EB 8389-1 EN
Translation of original instructions

EXPERTplus Valve Diagnostics
Type 3730-6 Electropneumatic Positioner

Firmware version 1.1x
Edition September 2018

Note on these mounting and operating instructions
These mounting and operating instructions assist you in mounting and operating the device
safely. The instructions are binding for handling SAMSON devices.
ÎÎ For the safe and proper use of these instructions, read them carefully and keep them forlater reference.
ÎÎ If you have any questions about these instructions, contact SAMSON‘s After-sales Service
Department (aftersalesservice@samson.de).

The mounting and operating instructions for the devices are included in thescope of delivery. The latest documentation is available on our website atwww.samson.de > Service & Support > Downloads > Documentation.

Definition of signal words! DANGER
Hazardous situations which, if not avoided,
will result in death or serious injury! WARNING
Hazardous situations which, if not avoided,
could result in death or serious injury

2! NOTICE
Property damage message or malfunction
Note
Additional information
Tip
Recommended action

EB 8389-1 EN

Contents

1

Description.....................................................................................................7

1.1

General.........................................................................................................7

1.2

Start-up..........................................................................................................9

1.3
1.3.1
1.3.2

Diagnostic functions......................................................................................10
Type of application.......................................................................................11
Assessment...................................................................................................112

Monitoring...................................................................................................13

2.1
2.1.1
2.1.2

Status messages............................................................................................13
Resetting status messages..............................................................................13
Condensed state...........................................................................................17

2.2

Logging........................................................................................................18

3

Data logger.................................................................................................21

3.1

Permanent data logging................................................................................21

3.2
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5

Triggered data logging..................................................................................22
Triggered by condensed state.........................................................................22
Triggered by set point, valve position, set point deviation or signal pressure.......23
Triggered by binary input..............................................................................24
Triggered by internal solenoid valve/forced venting.........................................25
Triggered by set point or internal solenoid valve/forced venting........................25

4

Valve signature............................................................................................27

4.1
4.1.1

Reference graphs..........................................................................................28
Analysis and monitoring................................................................................28

4.2
4.2.1

Valve signature, signal pressure(x)..................................................................29
Analysis and monitoring................................................................................30

4.3
4.3.1

Course of supply pressure..............................................................................31
Analysis and monitoring................................................................................32

4.4
4.4.1

Valve signature, friction(x).............................................................................33
Analysis and monitoring................................................................................34

4.5

Resetting single status messages.....................................................................34

5

On/off valve................................................................................................37

5.1

Diagnostics for on/off valve...........................................................................38

5.2

Analysis and monitoring................................................................................39

5.3

Resetting single status messages.....................................................................40

EB 8389-1 EN

3

Contents

6

Valve position x histogram...........................................................................41

6.1

Analysis and monitoring................................................................................42

6.2

Resetting single status messages.....................................................................427

Set point deviation e histogram.....................................................................44

7.1

Analysis and monitoring................................................................................45

7.2

Resetting single status messages.....................................................................46

8

Cycle counter histogram...............................................................................49

8.1

Analysis and monitoring................................................................................50

8.2

Resetting single status messages.....................................................................50

9Leakage sensor............................................................................................53

9.1
9.1.1
9.1.2

Start-up of the leakage sensor........................................................................54
Manufacturer reference.................................................................................54
Process reference..........................................................................................57

9.2
9.2.3

Short-term monitoring...................................................................................62
Resetting single status messages.....................................................................63

9.3
9.3.1

Long-term monitoring....................................................................................63
Resetting single status messages.....................................................................63

9.4
9.4.2

Sound level(x)...............................................................................................64
Resetting single status messages.....................................................................64

10

Course of end position..................................................................................67

10.1

Analysis and monitoring................................................................................68

10.2

Resetting single status messages.....................................................................68

11

Valve dead band..........................................................................................69

11.1

Resetting single status messages.....................................................................70

12

Partial stroke test (PST).................................................................................74

12.1

Start triggered by on/off valve.......................................................................79

12.2

Start triggered by the binary input.................................................................79

12.3

Analysis and monitoring................................................................................80

12.4

Resetting single status messages.....................................................................81

13

Full stroke test (FST)......................................................................................83

13.1

Analysis and monitoring................................................................................87

4

EB 8389-1 EN

Contents

13.2

Resetting single status messages.....................................................................87

14

SIL operator test...........................................................................................88

14.1

Analysis and monitoring................................................................................90

15

Binary input.................................................................................................91

16

Dynamic HART® variables.............................................................................93

17

Appendix.....................................................................................................95

17.1

Code list.......................................................................................................95

17.2

Error messages and recommended corrective action......................................103

17.3

Diagnostic data points saved in a non-volatile memory..................................108

17.4

Resetting parameters...................................................................................109

EB 8389-1 EN

5﻿Overview
On/off service

Throttling service

No configuration
required formonitoring

Configuration
required for
diagnosis

No configuration
required formonitoring

Configuration
required for
diagnosis

Travel histogram

Data logger

Travel histogram

Data logger

u Section 6

u Section 3

u Section 6

u Section 3

Set point deviation
histogram e

Valve signature

Set point deviation
histogram e

On/off diagnosis

u Section 7
Cycle counter
histogramu Section 8
Course of end
positionu Section 10

u Section 4
Packingu Section 7

u Section 8

Cycle counter
histogram

Leakage sensor

u Section 8

u Section 9
Valve dead bandu Section 11

Course of end
positionu Section 10

Full stroke test (FST)u Section 13

u Section 5
Packingu Section 8
Leakage sensor
u Section 9
Valve dead bandu Section 11
Partial stroke test
(PST)
u Section 12
Full stroke test (FST)Note:u Section 13−− Tests highlighted in red border require an initialization with valve signature−− Tests highlighted in gray can optimize the proper functioning of safety equipment according to IEC 61508 and IEC 61511,
provided these tests are performed regularly.

6

EB 8389-1 EN

Description

1 Description
1.1 General
These instructions supplement the standard
Mounting and Operating Instructions for theType 3730-6 Positioner (u EB 8384-6).
EXPERTplus is a diagnostic firmware integrated into the positioner which allows the predictive, status-oriented maintenance of valves
with pneumatic actuators.
EXPERTplus records the valve condition while
the process is running (in automatic mode)and generates messages on the required
maintenance work. In addition, numerous
tests can be performed in manual mode topinpoint emerging faults.
The diagnostic functions of EXPERTplus arecompletely integrated into the positioner. Diagnostic data are compiled, saved and analyzed in the positioner itself. Classified status
messages on the state of the valve are generated from the analysis.

All the parameter settings that are changed
must also be downloaded onto the positioner to allow them to become effective.
Local operation
Some parameters can be changed at the positioner as well as over the operator interface.
The positioner code of these parameters are
written in parentheses. Refer to the Mounting
and Operating Instructions of the Type 3730-6
Positioner (EB 8384-6) for a list of all parameters that can be changed at the positioner.
The operation described in the following
sections illustrates operation using TROVISVIEW 4. The default settings of the positioner and TROVIS-VIEW 4 are written in square
brackets [ ]. Settings highlighted in gray refer to operation using TROVIS-VIEW 4.

Operation using TROVIS-VIEW 4/DD/DTM/
eDD
EXPERTplus allows the parameters to beviewed or changed using the TROVIS-VIEW 4
software or DD/DTM/eDD.
TROVIS-VIEW 4 · SAMSON operator interface used to configure various SAMSON devices−− DTM · Device type manager to describe
the device and communication properties−− DD/eDD · Device description/enhanced
device description

EB 8389-1 EN

7

Description

Initialization mode

â

â

â

MAX

NOM

MAN/MAN2âInitialization including valve
signatureßà

Later recording ofreference graphs

No

START-UPYesâOperating mode = MAN

â

â

Zero
Valve signature (D1)

Code 81

Valve signature (D1)
All reference values are overwritten!

Code 81ß Not successful

ß Not successful

ß SuccessfulâOperating mode = AUTO

Automatic change to
AUTO operating modeà8

Throttling or on/off serviceßEB 8389-1 EN

Description

1.2 Start-up
The positioner must be initialized to use thefull scope of the valve diagnostics. During initialization the positioner adapts itself optimally to the friction conditions and the signal pressure required by the control valve. The positioner can be initialized using one of the following initialization modes: maximum range(MAX), nominal range (NOM), manual setting
1 (MAN) and manual setting 2 (MAN2).
−− Maximum range (MAX)
Initialization mode for simple start-up ofvalves with two clearly defined mechanical end positions, e.g. three-way valves−− Nominal range (NOM)
Initialization mode for all globe valves−− Manual setting 1 (MAN)
Initialization mode for globe valves requiring OPEN position to be entered manually−− Manual setting 2 (MAN2)
Initialization mode for globe valves requiring the end positions (OPEN and CLOSED
positions) to be entered manually
The type of application, pressure limit and thestart-up parameters required for the selected
initialization must be entered to initialize thepositioner.
Note
Positioner start-up is described in detail in theassociated Mounting and Operating Instructions (EB 8384-6).

al reference tests of the valve signature to be
performed. Refer to Section 4. The reference
tests required for the diagnostic functions cannot be performed if the positioner has been
initialized in the substitute calibration (SUB)
mode. By setting 'Initialization including valve
signature' = Yes, the positioner records the reference data automatically after initialization.
Start-up−−Type of application (Code 49 - h0): [Control
valve], On/off valve−−Initialization mode (Code 6): [Maximum
range (MAX)], Nominal range (NOM), Manual
setting 1 (MAN) or Manual setting 2 (MAN2)−−Initialization including valve signature(Code 48 - h0): [Yes]−−Pin position (Code 4): [Off], 17, 25, 35, 50,
70, 100, 200 mm, 90°−−Pressure limit (Code 16): 1.4 to [7.0] bar

During positioner initialization, the 'Kp level' and 'Tv level' are optimally set. If the positioner tends to overshoot impermissibly due
to other disturbances, the proportional-action
coefficient (Kp level) and derivative-action
time (Tv level) can be adapted accordingly.
Increment the derivative-action time until thedesired behavior is reached. When the maximum value of 4 is reached for the derivativeaction time, the proportional-action coefficient
can be reduced in steps.

The monitoring of friction, supply pressure,leakage, actuator springs, course of end position and zero point shift requires addition-

EB 8389-1 EN

9

Description! NOTICE
Kp level changes affect the set point deviation.
After changing the proportional-action coefficient 'Kp level', we recommend to recalibrate
the fine filter in the positioner. Use the 'Finetuning after Kp change' function for this.
Start-up > Control parameters−−Proportional-action coefficient Kp level(Code 17): 0 to 17, [7]−− Derivative-action time Tv level (Code 18): Off, 1
to 4, [2]−−Fine-tuning after Kp change

1.3 Diagnostic functions
There are two different types of diagnostic
functions:
1. Monitoring functions
Data are compiled, saved and analyzed
by the positioner while the process is running without disrupting the process. The
positioner follows the set point to position
the valve. A classified status alarm or fault
alarm is generated if the positioner detects an event.
2. Dynamic tests
Similar to the monitoring function, data
are compiled, saved and analyzed by the
positioner. However, in this case, the valve
position is not determined by the set point,
but by the settings of the test. The dynamic
tests can only be started when the conditions in the plant allow it (e.g. plant shutdown or service work in the workshop).
For reasons of safety, the dynamic tests,
except for partial stroke testing, can only be performed in the MAN operatingmode.
A dynamic test is stopped and the positioner changes to the fail-safe position
when the electrical signal falls below acertain level or when the solenoid valve
is triggered or the forced venting function is activated.

10

EB 8389-1 EN

Description

1.3.1

Type of application

Different diagnostic functions are available
depending on the type of application selectedin EXPERTplus. The types of application 'Control valve' and 'On/off valve' are available.
Depending on the type of application selected, the positioner behaves differently in theautomatic mode (AUTO):−− Control valve
The positioner uses the set point to position the valve.
The valve position (current position) appears in % on the display.
−− On/off valve
Discrete analysis of the set point
The valve position (current position) in %and O/C (Open/Close) appear in alternating sequence on the display. See
u Section 5.
Start-up−−Type of application (Code 49 - h0): [Control
valve], On/off valve

On-site operation Code 49 - h0−−Type of application [No], YES, ESC
No = Control valve
YES = On/off valve

1.3.2

Assessment

Table 1 shows the diagnostic functions andtheir statements on the condition of the valve
depending on the type of application.

EB 8389-1 EN

11

Description

Table 1: Diagnostic functions and test analysis
Controlvalve

On/offvalve

Data logger•

Valve signature

Diagnostic functions

Assessment

See section•

Depending on trigger status
selectedu 3 on page 21•

U−−Change in friction−−Supply pressure−−Defective actuator springs−−Pneumatic leakage

u 4 on page 27

On/off valve–•−−Breakaway time−−Transit time−−Valve end positionu 5 on page 37

Valve position
histogram•

U−−Change in manipulated variable
range−−Manipulated variable range

u 6 on page 41

Set point deviation
histogram••−−Manipulated variable range
limitation−−Seat leakage−−Positioner-valve linkage−−Average set point deviationu 7 on page 44

Cycle counter
histogram••−−Packing leakage−−Dynamic stress factor

u 8 on page 49

Leakage sensor••−−Seat leakage

u 9 on page 53

Course of end
position••−−Course of end position−−Zero shift

u 10 on page 67

Valve dead band••−−Dead bandu 11 on page 69

Partial stroke test
(PST)

•

•

−−Overshooting−−Dead time−−T86−−Settling time

u 12 on page 74

Full stroke test (FST)••−−Overshooting−−Dead time−−T86−−Settling time

u 13 on page 83

Monitoring

Dynamic tests

•
U

–

12

Full scope of functions
Function is performed, but not analyzed
Function is not performed

EB 8389-1 EN

Monitoring

2 Monitoring
2.1 Status messages
The valve diagnostics integrated into the positioner generates classified status messages.
Messages generated from the analysis of thediagnosis can be classified according to thepossible causes. See u Section 4 to 13.
The following classifications are possible:−− No message
If an event is classified as “No message”,
this event does not have any affect on thecondensed state.
−− Function check
Test or calibration procedures are performed in the positioner. The positioner
is temporarily unable to perform its control task as long as the procedure is taking place.
−− Maintenance request/maintenance required
The positioner still performs its control task(with restrictions). A maintenance demandor above average wear has been determined. The wear tolerance will soon be
exhausted or is reducing at a faster rate
than expected. Maintenance is necessary
in the medium term.
−− Out of specification
The positioner is running outside the specified operating conditions.
−− Failure
The positioner cannot perform its control
task due to a functional fault in the positioner itself or in one of its peripherals or

EB 8389-1 EN

an initialization has not yet been successfully completed.
You can view these messages in TROVISVIEW 4 in the Diagnostics folder (> Monitoring) and its subfolders. The 'Positioner status','Valve status', 'Actuator status' and 'Valve position status' messages provide a condensed
state of the status messages of each subfolder.

2.1.1

Resetting status messages

When a status message is generated, you
should first locate the source of the fault andtake action to remedy it.
For recommended action concerning the status messages see u Section 17.2.
Status messages can be reset individuallyor using the reset function. Table 2 on page
15 contains an overview on how the diagnosis can be reset. Resetting is performedin the Diagnostics folder (> Service/maintenance > Reset).
If you want to keep measured data and theanalysis after resetting the positioner, it is possible to upload them onto a computer.
Resetting single status messages−− Status messages represented by a code in
the positioner can be confirmed at the positioner itself. Select the error code andconfirm it by pushing the rotary pushbutton. See the standard instructions of thepositioner u EB 8384-6.
−− On resetting histograms and diagrams,
the data for short-term monitoring are also reset.

13Monitoring−− Resetting measured data does not cause
the diagnostic parameters and reference
value to be reset as well.
−− The positioner does not need to be re-initialized after resetting.
Reset measured diagnostic data
Code 36 - Diag−− Parameters are reset as described inu Section 17.4.
−− Resets diagnostics assessment.

Reset to default settings
Code 36 - DS−− Parameters are reset as described inu Section 17.4.
−− Resets diagnostics assessment.
−− Reference values are deleted.
−− Status classification and data logs are deleted.
−− The positioner must be re-initialized after
resetting.

−− Reference values remain unchanged.
−− Status classification and data logs remain
saved.
−− The positioner does not need to be re-initialized after resetting.
−− If the diagnostic data are to be reset atregular intervals, enter the time in "Desired time until ‘Reset measured diagnostic data" (Code 48 - h3). The setting"00:00:00" causes the resetting at regular intervals to be deactivated.

Note
Before mounting the positioner on a new control valve, perform a reset by selecting thecommand 'Reset to default settings' (Code 36- DS) and re-initialize the positioner.

Reset start-up parameters
Code 36 - Std−− Parameters are reset as described inu Section 17.4.
−− Resets diagnostics assessment.
−− Reference values are deleted.
−− Status classification remains unchanged.
−− Data logs are reset.
−− The positioner must be re-initialized after
resetting.

14

EB 8389-1 EN

Monitoring

Table 2: Resetting the diagnosis
ResettingCode 36
single status
messages Diag Std
DS
ReferencegraphsData logger

Valve signature
Leakage sensor

NO
YES

NO

YES

YES

YES

NO

YES

YES

NO

YES

YES

YES

YES

YES

YES

YES

NO

NO

YES

YES

YES

YES

YES

YES

Measured values
Measured values

Friction(x)Valve position x histogram
Short-term monitoring
Set point deviation e histogram
Short-term monitoring
Cycle counter histogram
Short-term monitoring
Leakage sensor Short-term monitoring

YES

Manufacturer reference

Course of supply pressure Configuration

On/off valve

YES

Process reference
Configuration and measured values

Valve signature Signal pressure(x)NO

Measured values

YES

YES

YES

YES

Configuration

YES

NO

YES

YES

Measured values

YES

YES

YES

YES

Measured values

YES

YES

YES

YES

'Sampling time' andmeasured values

YES

YES

YES

YES

Measured values

YES

YES

YES

YES

'Sampling time' andmeasured values

YES

YES

YES

YES

Measured values

YES

YES

YES

YES

Measured values

YES

YES

YES

YES

'Sensitivity sound level'
and measured values

YES

YES

YES

YES

Long-term monitoring

Measured values

YES

YES

YES

YES

Sound level(x)Measured values

YES

YES

YES

YES

Course of lower end position

Measured values

YES

YES

YES

YES

Reference value

YES

NO

YES

YES

Valve dead band

Configuration andmeasured values

YES

YES

YES

YES

Partial stroke test (PST)

Configuration andmeasured values

YES

NO*

YES

YES

* Except for 'Sampling time' parameterEB 8389-1 EN

15

Monitoring

ResettingCode 36
single status
messages Diag Std
DS
Full stroke test (FST)

Configuration andmeasured values

YES

NO*

YES

YES

* Except for 'Sampling time' and 'Max. test duration' parameters

Alarm settings

NO

See uSec.17.4

Status classification according to NAMUR 107

NO

NO

NO

YES

All logged messages, see u Section 2.2

YES

NO

YES

YES

Operating hours counter

NO

NO

NO

NO

NO

NO

YES

YES

Device in operation16

Device switched on since initialization

NO

NO

YES

YES

Device in operation since initialization

NO

NO

YES

YES

EB 8389-1 EN

Monitoring

2.1.2

Condensed state

To provide a better overview on the conditionof the positioner, all status messages are summarized in a condensed state which is madeup from a summary of all classified messages
in the positioner. The status message with thehighest priority determines which condensed
state is set.
The condensed state appears in TROVISVIEW 4 on the right-hand side of the info bar
and in the Measured process values folder.
See u Table 3 for a description of the icons
and their meaning.
Additionally, the condensed state can beused to trigger the data logger. See uSection 3.2.1.

The condensed state can be read in the positioner display in Code 48 - d6. See u Table 3.
Condensed state at the fault alarm output
The condensed state also be read out at thefault alarm output if one of the following conditions occurs:
1. Condensed state 'Failure' is activated.
2. Condensed state 'Function check' is activated and the fault alarm output is activated.
3. Condensed state 'Maintenance required'or 'Out of specification' is activated andthe fault alarm output is activated.

Note
The condensed state is marked by until the
positioner data have been uploaded.

Table 3: Condensed state reading
Status message

TROVIS-VIEW 4/DTM

FailureredFunction checkorangeOut of specification

yellow

Maintenance request/
maintenance requiredblue

No message, OK

green

EB 8389-1 EN

Positioner

Priority

Text e.g. TESTING, TUNEor TEST
blinking

17

Monitoring

Device settings > Alarm settings
2. −−Fault alarm at condensed state 'Function
check' (Code 32): Yes
3. −−Error message in case of 'Maintenance required' and 'Out of specification' condensed states (Code 33): Yes

2.2 Logging
The last 30 generated messages are saved in
the positioner with a time-stamp (logged by
the operating hours counter) and with details
on how long the message exists.
You can view these messages in TROVISVIEW 4 in the Diagnostics folder (> Monitoring > Logging).
Logging starts automatically 15 minutes after
initialization. It does not need to be activated by the user.

Note
Logging can only be deactivated when the associated status classification is set to 'No message'.
Device settings > Alarm settings > Statusclassification > Logging−−Supply pressure: [Yes], No−−Change in friction: [Yes], No−−Seat leakage: [Yes], No−−Packing leakage: [Yes], No−−Pneumatic leakage: [Yes], No−−Defective actuator springs: [Yes], No−−Manipulated variable range limitation: [Yes],No−−Course of end position: [Yes], No−−Positioner-valve linkage: [Yes], No

Messages are logged when:−−Manipulated variable range: [Yes], No−− Their status classification is not 'No message'.

−−Change in manipulated variable range: [Yes],No−− Their recording in the logging is activated.
−− The 'Internal solenoid valve/forced venting/supply pressure' message is only additionally logged when the time enteredin 'Min. interval for new logging of internal solenoid valve' has elapsed between the generation of two 'Internal solenoid valve/forced venting/supply pressure' messages.

18−−Partial stroke test (PST) [Yes], No−−Full stroke test (FST): [Yes], No−−On/off valve: [Yes], No−−Code 50-58, 61, 63, 76, 81: [Yes], No−−Binary input: [Yes], No−−Data logger: [Yes], No−−Internal solenoid valve/forced venting/supply
pressure: [Yes], No−−Min. interval for new logging of internalsolenoid valve: 0 to 5000 s, [300 s]

EB 8389-1 EN

Monitoring

The following messages are not logged ifthey are generated due to a hardware error:−− Packing leakage−− Pneumatic leakage−− Manipulated variable range limitation−− Course of end position−− Positioner-valve linkage−− Manipulated variable range−− Change in manipulated variable range
In this case, only the original hardware error is logged:−− x > range (Code 50)−− Internal solenoid valve/forced venting/supply pressure (Code 54)−− Transit time not reached (Code 55)−− Inconsistent data memory (Code 59)−− Internal device error (Code 60)−− x signal (Code 62)−− i/p converter (Code 64)−− Hardware (Code 65)

EB 8389-1 EN

19

Monitoring
Data logger

FunctionââPermanent

TriggeredââSampling time

Triggered byâStart 1)
ââ

START-UP

Condensed
stateâ

w, x, eor pout

â

BE

â

â

Solenoid
valve/
forcedventingw or solenoid
valve/forced
ventingâ

Trigger conditionâ

Trigger value

Trigger value

Trigger band

Trigger band

Trigger condition

Trigger conditionâ
Trigger lead time
Sampling timeâ
100 measured
values(w, x, e, pout)âStart 1)
â
Trigger eventâ
PROCESS

Logged by operating hours
counterââMeasured values (w, x, e, pout) before trigger
event+ Measured values (w, x, e, pout) after trigger event(Number = Trigger lead/Sampling time)(Number = 100 – Trigger lead/Sampling time)âTotal 100 measured values (w, x, e, pout)
1)

20

The data logger is started by the software, e.g. TROVIS-VIEW 4

EB 8389-1 EN

Data logger

3 Data logger

3.1 Permanent data logging

The data logger records the measured variables (valve position x, set point w, set point
deviation e and signal pressure pout). The recorded data are plotted against time in agraph.

The measured variables are logged at the rate
defined in 'Sampling time' and saved in a circular buffer, which holds 100 data points per
measured variable at one time.

Note
The data logger is interrupted and must bereactivated when one of the following eventsoccurs:−−Failure of power supply of the positioner−−Failure of power supply of the external solenoid valve

Note
You can read the measured data logged overthe past 24 hours from the 'Data logger'
graph when the Diagnostics folder (> Datalogger) is left open over this period.

Fig. 1: Diagnostics > Data logger

EB 8389-1 EN

21

Data logger

Defining parameters

Defining parameters

1. Select 'Permanent' (Function).

1. Select 'Triggered' (Function).

2. Enter sampling time.

2. Select the triggering event.

3. Start data logger.
The 'Test information' status indicates 'Test
active'.

3. Enter sampling time.

Diagnostics > Data logger
1. −−Function: [Permanent]
2. −−Sampling time: 0.2 to 3600.0 s, [1.0 s]

4. Start data logger.
The 'Test information' status indicates 'Test
active'.
When the data logging is finished, theProgress bar indicates 'Memory full, data
recording completed'.

3. −−Start data logger

Note
Right-click 'Cancel data logger' and select'Execute' to stop the data logger ('Test information' = 'Test not active').

3.2 Triggered data logging
Measured values are saved in a circular buffer after the event defined in 'Triggered by'has occurred (see u Section 3.2.1 to 3.2.5).
The event that has triggered data logging
is recorded. Data logging is terminated after 100 measured values per measured variable have been saved in the circular buffer.
The 'Sampling time' determines the time between recordings. A 'Trigger lead time' greater than 0 also leads to the measuring values
before the triggering event for the time selected being included in the 100 measured values per measured variable. The 'Trigger leadtime' may include the value 100 x 'Samplingtime' at the maximum.

22

Note
Right-click 'Cancel data logger' and select'Execute' to stop the data logger ('Test information' = 'Test not active').

3.2.1

Triggered by condensed
state

The measured values are included in the triggered event when the condensed state definedin 'Triggered by condensed state' arises.
Note
If 'Function check' is selected as the condensed state ('Triggered by condensed state'),data are logged when a dynamic test starts.
Data from each test start are logged.
Diagnostics > Data logger
1. −−Function: Triggered.
2. −−Sampling time: 0.2 to 3600.0 s, [1.0 s]
3. −−Triggered by: Condensed state

EB 8389-1 EN

Data logger−−Trigger lead time:
0.0 s to 100 x 'Sampling time', [20.0 s]−−Triggered by condensed state: No message,
Function check [Maintenance required],
Maintenance demanded, Out of specification, Failure'Trigger condition' = Increasing signal/
upper band value exceeded
w, x, y, e

4. −−Start data logger

3.2.2

Triggered by set point,valve position, set point
deviation or signal pressure

The measured values are included in the triggered data logging when the conditions forthe selected measured variable (set point w,
valve position x, set point deviation e or signal
pressure pout) defined in 'Trigger value', 'Trigger band' and 'Trigger condition' are met.
'Trigger condition' = Decreasing signal/
lower band value undercut
w, x, y, e

Trigger value
Lower band limit =Trigger value – ½ Trigger band
Trigger band

The conditions for starting a trigger event are
met when the value falls below the limit ('Trigger value' – ½ 'Trigger band').

EB 8389-1 EN

Upper band limit =Trigger value + ½ Trigger band
Trigger value
Trigger band

The conditions for starting a trigger event are
met when the value falls below the limit ('Trigger value' – ½ 'Trigger band').
'Trigger condition' = Band exit
w, x, y, eUpper band limit =Trigger value + ½ Trigger band
Trigger value
Lower band limit =Trigger value - ½ Trigger band
Trigger band

The conditions for starting a trigger event are
met when the value falls below the limit ('Trigger value' – ½ 'Trigger band') or exceeds thelimit ('Trigger value' + ½ 'Trigger band').
This function is only active when 'Trigger
band' ≠ 0.

23

Data logger'Trigger condition' = Band entry
w, x, y, e−−Trigger condition: [Decreasing signal/lower band value undercut], Increasing signal/upper band value exceeded, Band exit, Band entry
3. −−Sampling time: 0.2 to 3600.0 s, [1.0 s]

Upper band limit =Trigger value + ½ Trigger band
Trigger value
Lower band limit =Trigger value - ½ Trigger band
Trigger band

The conditions for starting a trigger event are
met when the value exceeds the limit ('Trigger value' – ½ 'Trigger band') or falls below
the limit ('Trigger value' + ½ 'Trigger band').
This function is only active when 'Trigger
band' ≠ 0.
Diagnostics > Data logger
1. −−Function: Triggered

4. −−Start data logger

3.2.3

Triggered by binary inputThis setting is only active when a binary input
is installed in the positioner. If this is not thecase, the Progress bar indicates 'Cannot startdata logger – trigger cannot be set'.
The measured values are included in the triggered data logging when the state of the binary input changes.
Diagnostics > Data logger
1. −−Function: Triggered
2. −−Triggered by: Binary input

2. −−Triggered by: Valve position, set point deviation, signal pressure or set point−−Trigger lead time:
0.0 s to 100 x 'Sampling time', [20.0 s]−−Trigger value:
0.0 to 100.0 %, [99.0 %] (set point, valve
position, set point deviation)
0.0 to 7000.0 mbar, [99.0 mbar] (signal
pressure)

3. −−Sampling time: 0.2 to 3600.0 s, [1.0 s]
4. −−Start data logger−−Trigger band:
0.0 to 100.0 %, [99.0 %] (set point, valve
position, set point deviation)
0.0 to 10000.0 1/s, [99.0 1/s] (drive signal)−−Trigger lead time:
0.0 s to 100 x 'Sampling time', [20.0 s]

24

EB 8389-1 EN

Data logger

3.2.4

Triggered by internalsolenoid valve/forced
venting

This setting is only active when an internalsolenoid valve/forced venting is installed in
the positioner. See 'Internal solenoid valve/
forced venting' reading. If this is not the case,
the Progress bar indicates 'Cannot start datalogger – trigger cannot be set'.
The measured values are included in the triggered data logging when the solenoid valve
is triggered or the forced venting is activated.
Diagnostics > Data logger

noid valve/forced venting“ or 'Triggered by
set point' are met.
Diagnostics > Data logger
1. −−Function: Triggered−−Triggered by: Set point or internal solenoid
valve/forced venting−−Trigger value: 0.0 to 100.0 %, [99.0 %]−−Trigger band: 0.0 to 100.0 %, [99.0 %]−−Trigger lead time:
0.0 s to 100 x 'Sampling time', [1.0 s]−−Trigger condition: [Decreasing signal/lower band value undercut], Increasing signal/upper band value exceeded, Band exit, Band entry

1. −−Function: Triggered

3. −−Sampling time: 0.2 to 3600.0 s, [20.0 s]

2. −−Triggered by: Internal solenoid valve/
forced venting

4. −−Start data logger−−Trigger lead time:
0.0 s to 100 x 'Sampling time', [20.0 s]
3. −−Sampling time: 0.2 to 3600.0 s, [1.0 s]
4. −−Start data logger

3.2.5

Triggered by set point orinternal solenoid valve/
forced venting

This setting is only active when an internal solenoid valve/forced venting is installed in thepositioner. See 'Internal solenoid valve/forced
venting' reading. If this is not the case, theProgress bar indicates 'Cannot start data logger – trigger cannot be set'.
The measured values are included in the triggered data logging when one of the conditions defined in 'Triggered by internal sole-EB 8389-1 EN

25

Data
Valve
loggersignature

Requirements:– Actuator: Single-acting– Type of application: Control valve
Only applies to first start-up after reset with Code 36

â – DS or Std.
Initialization including valve signatureâàStart initialization
âValve signature
canceled

Not successful

START-UP

Valve signature recordingâValve signature, signal pressure(x)Course of supply pressureâAlarm settings
ATC

Valve signature, friction(x)âRecording threshold

ATO and ATCâAlarm settings

Zero limit,
lag time

Lower limit

Status classification (NE 107)

Status classification (NE 107)

Status classification (NE 107)

Supply pressure

Change in friction

Zero

Spring pre-loading

Upper limitâ

Lower in total range
x0 >(ZPInit + Zero limit) Reduced springx0 < (– Zero limit) pre-loading

Too lowNotavailable
Perm.
limit

Lower/higher in midposition
Too high

exceeded

PROCESSââ

Analysis (NE 107)/logged byoperating hours counter
Zero

Defective actuator
springsââ

Lower/higher nearmax. OPEN position
Lower/higher nearââ CLOSED position

Analysis (NE 107)/logged byoperating hours counter

Analysis (NE 107)/logged byoperating hours counter

Supply pressure status

Change in friction

Min. supply pressure
Max. supply pressure
Dwell time (supply pressure< 1.0 bar)
Dwell time (supply pressure> 7.0 bar)â
Reset 'Pressure sensor monitoring values'

26

EB 8389-1 EN

Valve signature

4 Valve signature
The valve signature plots the signal pressure
pout as a function of valve position x.
All diagnostic functions dependent on the signal pressure are based on the valve signature,e.g. to detect pneumatic leakage or to reveal
an excessively high or low supply pressure.
Note
Additionally, the pneumatics are monitored
using the 'Leakage limit' parameter, which isadjustable between 0 and 100 % in the Device settings folder (> Alarm settings). The
positioner generates the 'Pneumatic leakage'
message whenever the leakage exceeds thislimit value. 'No message' is assigned by default.

Requirements
1. A single-acting actuator is mounted on thevalve.
2. The valve operates as a control valve.
Device settings > Actuator
1. −−Principle of operation (Code 48 - d11):
Single-acting
Start-up
2. −−Type of application (Code 49 - h0):[Control valve]

To perform monitoring while the process isrunning, the reference graph must first be
plotted.

Fig. 2: Start-up > Reference graphs > Valve signature

EB 8389-1 EN

27

Valve signature

4.1 Reference graphs
During the plotting of the reference graph(Fig. 2), the valve is moved very slowly fromthe end position at which no pressure is applied to the actuator to the position at which
the maximum air signal is applied to the actuator. The valve is then moved back again to
its end position. During which, the positioner switches to open-loop control (control without feedback).
The sensitivity of reference graph plotting defines at which speed the valve is moved. The
time span how long the reference graph is tobe plotted depends on the sensitivity selected.
Select 'High' for valves with small bench ranges and/or high friction.
After the reference graph has been plotted,
the recorded data points for signal pressure
pout and valve position x are converted into
fixed points.
Note
The valve positions cannot be predicted inopen-loop control (control without feedback).
The reference graph may differ for the same
valve after each logging.
Defining parameters
The reference graph is automatically plotted
after initialization when 'Initialization including valve signature' = Yes.
Start-up−−Initialization including valve signature(Code 48 - h0): [Yes]28

The reference graph can also be plotted separately outside initialization.
1. Switch to manual mode.
2. Select 'Sensitivity' from the drop-down list.
3. Start test.
The 'Test information' status indicates 'Test
active'. 'D1' and 'TEST' are indicated inalternating sequence on the positioner display.
'Function check' is activated as the condensed state.
Start-up
1. −−Enter operating mode (Code 0): ManualStart-up > Reference graphs > Valvesignature
2. −−Sensitivity: Low, [Medium], High
3. −−Start test

4.1.1

Analysis and monitoring

The positioner records the data for filling andventing the actuator. It then determines thecharacteristic values listed below:−− 'Mean hysteresis': Average hysteresis (average signal pressure change Δpout in relation to the spring range)−− 'Min. hysteresis': Lowest possible hysteresis (minimum signal pressure change Δpoutin relation to the spring range)−− 'Max. hysteresis': Highest possible hysteresis (maximum signal pressure changeΔpout in relation to the spring range)−− 'Detected lower spring range value': Signal pressure pout when the actuator is filledwith the minimum amount of air

EB 8389-1 EN

Valve signature−− 'Detected upper spring range value': Signal pressure pout when the actuator is filledwith the maximum amount of air
The 'Valve signature canceled' message is
generated if the test is canceled.
Start-up > Initialization result−−Valve signature canceled (Code 81):, , ,The 'Test status' reading indicates the reason
why the test was canceled:−− No supply pressure: The supply pressure
was under 500 mbar during the test.
−− Valve moved too quickly. Recommended
action: Increase sensitivity−− Position at pmax not reached (filling withair):
(1) Even though the pressure was increased in steps from 0 bar to the maximum amount of air for filling the actuator,
the valve was not able to reach the maximum position in closed-loop operation.
(2) The minimum valve position without tight-closing is below 96 %.
Recommended action: Increase supply
pressure.
−− Position at pmin not reached (venting):(1) Even though the pressure was reduced in steps from the maximum
amount of air for filling the actuator, thevalve was not able to reach the minimum
position in closed-loop operation. The
valve might be jammed.
(2) The minimum valve position without
tight-closing is above 4 %.
−− Time-out

EB 8389-1 EN−− Double-acting actuator−− Internal error−− Current too low−− Internal solenoid valve/forced venting
triggered−− SUB initialization

4.2 Valve signature, signal
pressure(x)The positioner records the data for filling andventing the actuator during closed-loop operation. The recorded data can be directly compared with the reference graph. Additionally,
the minimum, maximum and current supply
pressure are shown in the graph.
Data are recorded in the background regardless of the operating mode selected if a reference graph has already been plotted. Data
logging does not need to be activated.
Note
The positioner determines the minimum andmaximum supply pressure while plotting thereference graph. The current supply pressure
may fall below the minimum supply pressureand exceed the maximum supply pressure.
Defining parameters
1. Record the reference graph. See u Section 4.2.
2. Set the limit for zero monitoring in control valves with closed position ATC (airto close).
3. Select classification for status messages.
See u Section 4.2.1.

29

Valve signature

4.2.1

Device settings > Alarm settings
2. −−Zero limit (Code 48 - d5):
0.0 to 100.0 %, [5.0 %]If the monitoring line has a smaller gradientthan the reference line, this pinpoints to a reduced compression of the actuator springs.

−−Lag time: 1 to 9999 s, [30 s]
Device settings > Alarm settings > Statusclassification > Positioner
3. −−Zero (Code 58):,[],

Diagnostics > Monitoring > Actuator

Defective actuator springs,,,

Valves with ATC (air to close) closed position

Device settings > Alarm settings > Statusclassification > Actuator],,−−Defective actuator springs:,−− Reduced spring pre-loading: [Analysis and monitoring,

In valves with ATC closed position, the positioner generates a zero error when the valve
position in the tight-closing position is larger
than the sum of the initialization zero points
and 'Zero limit' or smaller than the negative'Zero limit' after the adjusted 'Lag time' haselapsed.
Diagnostics > Monitoring > Positioner−−Zero (Code 58):

,

,

,

Fig. 3: Diagnostics > Monitoring/tests > Valve signature > Valve signature, signal pressure(x)30

EB 8389-1 EN

Valve signature

4.3 Course of supply pressure
During control-loop operation, five values ofthe supply pressure are recorded and saved
in a circular buffer. A new supply pressure
is recorded and saved in the circular bufferwhen it deviates from the last value plotted in
the graph by the amount entered in 'Recording threshold'.
Data are recorded in the background regardless of the operating mode selected. Data logging does not need to be activated. To monitor the limits ('Lower limit' and 'Upper limit'), the corresponding limit must be activatedfirst. The limits are automatically determinedwhile the valve signature is being plotted. Alternatively, user-defined limits can be entered.

Defining parameters
1. Define 'Recording threshold'.
2. Enter limits for monitoring. See u Section
4.3.1.
3. Select classification for status messages.
See u Section 4.3.1.
Diagnostics > Monitoring/tests > Valvesignature > Course of supply pressure
1. −−Recording threshold:0.10 to 14.00 bar, [0.50 bar]
Device settings > Alarm settings
2. −−Activate lower limit: [Yes], No−−Lower limit: [0.0] to 7.0 bar−−Activate upper limit: Yes, [No]−−Upper limit: [0.0] to 7.0 bar

Fig. 4: Diagnostics > Monitoring/tests > Valve signature > Course of supply pressure

EB 8389-1 EN

31

Valve signature

Device settings > Alarm settings > Statusclassification > Supply pressure
3. −−Permissible limit exceeded:, , ,[ ]−−Too high:,[−−Fluctuates: [],−−Too low:

],
],

,

−−Not available:

,

,

4.3.1

−−Time stamp of max. supply pressure−−Dwell time (supply pressure < 1.0 bar),,[−−Time stamp of min. supply pressure−−Max. supply pressure,,−−Min. supply pressure−−Dwell time (supply pressure > 7.0 bar),[]

Analysis and monitoring

The positioner generates the 'Supply pressure
status' message with the defined status classification.
−− 'Too high' if the supply pressure exceeds
the 'Upper limit'.
−− 'Not available' if the supply pressure falls
below 0.1 bar.
−− 'Too low' if the supply pressure exceeds
the 'Lower limit'.
−− 'Permissible limit exceeded' if the supply
pressure exceeds 7.0 bar.
A fluctuating supply pressure is recognizedby the positioner whenever the supply pressure continuously falls below the 'Lower limit'
and rises above the 'Upper limit'. In such cases, the positioner generates the 'Supply pressure status' message with the defined statusclassification.
Diagnostics > Monitoring > Actuator−−Supply pressure status:

,

,

,

−−Supply pressure (Code 48 - d7)

32

EB 8389-1 EN

Valve signature

4.4 Valve signature, friction(x)The positioner calculates the friction duringclosed-loop operation and compares it withthe friction determined when the referencegraph was plotted.
Data are recorded automatically 15 minutes
after initialization (regardless of the operating mode selected) if a reference graph has
already been plotted. Data logging does notneed to be activated.
Defining parameters
1. Record the reference graph. See u Section 4.1.
2. Select classification for status messages.
See uSection 4.2.1.

Device settings > Alarm settings > Statusclassification > Valve
2. Change in friction−−Higher in total range: [],−−Lower in total range: [

],

,

,

,

−−Higher in mid-position: [],−−Lower in mid-position: [

],

,
,
,

,
,

−−Higher near max. OPEN position:[ ], , ,−−Lower near max. OPEN position:[ ], , ,−−Higher near CLOSED position:[ ], , ,−−Lower near CLOSED position:[ ], , ,Fig. 5: Diagnostics > Monitoring/tests > Valve signature > Valve signature, friction(x)EB 8389-1 EN

33

Valve signature

4.4.1

Analysis and monitoring

The positioner generates the 'Change in friction' message with the selected status classification. The friction for the total range of thevalve, the mid valve position and for the ranges near to the end positions are compared.
The positioner calculates the friction duringclosed-loop operation from the actuator filling and venting graphs at the point where a
directional change in valve travel takes place.
The positioner converts the friction data into fixed points close to the point of directional change and compares them to the reference friction.
If the friction at a fixed point increases to morethan double of the reference friction, the friction is regarded to be higher.

4.5 Resetting single status messages
All messages generated by the valve signature
can be reset together by selecting and executing "Reset 'Pressure sensor monitoring values". These messages include:−− Change in friction−− Supply pressure status−− Defective actuator springs−− ZeroAt the same time, the supply pressure data
(supply pressure, min. supply pressure andmax. supply pressure) are reset as well.
Diagnostics > Service/maintenance > Reset−−Reset 'Pressure sensor monitoring values'

If the friction at a fixed point drops to less thanhalf of the reference friction, the friction is regarded to be lower.
Note
To ensure that sufficient data points are available for calculating the friction, the valve mustnot be moved too quickly.
Diagnostics > Monitoring > Valve−−Change in friction:

34

,

,

,

EB 8389-1 EN

Valve
On/offsignature
valve

Prerequisite:– Type of application: On/off valve
âOperating point, Limit fail-safe position, Limit operating pointâTravel time assessment limit

START-UP

Valve end position limit
Status classification (NE 107)
Breakaway time increasing/decreasing
Transit time increasing/decreasing
Final travel/angle value not reached
Final travel/angle value increasing/decreasing

Define parameters for partial stroke
test, see u Section 12ââ

On/off diagnosis

Discrete set point analysis PST

x [%]
w [%]

x [%]
w [%]

50
25

t [s]

∆t > 6 st [s]âFirst analysis after defining parameters =­Reference

PROCESS

Breakaway time, transit
time, valve end position(increasing/decreasing)ââ

Analysis (NE 107)/
logged by operating hours counter

Analysis, see u Section 12.3

On/off valve status

â
Reset measured 'On/off valve' values

Reset all 'On/off valve' parameters

36

EB 8389-1 EN

On/off valve

5 On/off valve
The travel range of open/close (on/off) is defined by the fail-safe position and the operating point. As a result, the following parameters to determine the working range and set
point range are not analyzed and cannot bechanged.
−− Lower travel/angle range value−− Upper travel/angle range value−− Lower travel/angle limit−− Upper limit for travel/angle−− Lower set point range value−− Upper set point range value
The discrete analysis of the reference variable
is performed in automatic mode.
If the set point ( ) is below 'Operating point
limit' when the automatic mode starts, thevalve ( ) moves to the fail-safe position. If
the set point increases and exceeds 'Operating point limit', the valve moves to the 'Operating point'. The valve moves back to the failsafe position (0 % in the example) if the set
point then falls below 'Fail-safe action limit'.
x [%]
w [%]

If the set point ( ) is above 'Operating point
limit' when the automatic mode starts, thevalve ( ) moves to the operating point. The
valve moves back to the fail-safe position (0 %in the example) if the set point then falls below'Fail-safe action limit'.
x [%]
w [%]
Operating point

Operating point limit

50
25
Fail-safe action limit
Fail-safe positiont<6sStarting the partial stroke test (PST)
A partial stroke test is started when the set
point ( ) moves starting from the operating
point into the range between 25 and 50 % of
the travel range and remains there for longer
than six seconds. See u Section 12.1.
x [%]
w [%]
Operating point =Lower range value (PST)

Operating pointt [s]Start PST

Stop PST

Upper range value (PST)
Operating point limit

Operating point limit

50

50

25

25

Fail-safe action limit

Fail-safe action limit

Fail-safe position∆t > 6 s

EB 8389-1 ENt [s]Fail-safe position

t>6s

t [s]

37

On/off valve

The PST diagnostic parameter 'Lower range
value' must be within the defined position± 'Tolerance limit' for the partial stroke test
to start.

−−Fail-safe action limit (Code 49 - h2): 0.0 to
20.0 %, [12.5 %]After the partial stroke test is completed, thevalve moves back to its last position (fail-safe
position or operating point).

Diagnostics > Monitoring/tests > Dynamic
tests > Partial stroke test (PST)−−Operating point limit (Code 49 - h5):55.0 to 100.0 %, [75.0 %]3. See u Section 12

Canceling the partial stroke test (PST)The partial stroke test is canceled whenever
the set point ( ) leaves the range between'Fail-safe action limit' and 'Operating point
limit', falling below 'Operating point limit'.
After the partial stroke test is canceled, thevalve moves back to its last position (fail-safe
position or operating point).
Defining parameters
Note
The parameters can only be defined in
TROVIS-VIEW 4 after the 'Type of application'
has been set to 'On/off valve'.
1. Select the type of application.
2. Define parameters for on/off valve.
3. Define parameters for partial stroke test
(PST). See u Section 12.
Start-up
1. −−Type of application (Code 49 - h0): On/
off valve
Device settings > Positioner > Transfer
characteristic on/off
2. −− Operating point (Code 49 - h1): 0.0 to
100 %, [100 %]38

5.1 Diagnostics for on/offvalve
The diagnostics for on/off valve provide statements on the valve end positions, transit times(increasing/decreasing) and breakaway times(increasing/decreasing).
The data are recorded automatically for the
diagnostics for on/off valve in automaticmode. Data logging does not need to be activated.
The positioner compares the current breakaway time, transit time and valve position
with the values recorded during the reference
measurement (first analysis) while the plant isrunning.
Defining parameters
Note
The parameters can only be defined in
TROVIS-VIEW 4 after the 'Type of application'
has been set to 'On/off valve'.
1. Enter limits for monitoring. See u Section
5.2.
2. Select classification for status messages.

EB 8389-1 EN

On/off valve

Device settings > Alarm settings
1. −−Travel time assessment limit (Code 49 - h7):[0.6] to 30.0 s−−Valve end position limit (Code 49 - h8):[0.3] to 100.0 %Device settings > Alarm settings > Statusclassification > On/off valve
2. −−Increasing breakaway time: [

],

,

,

−−Decreasing breakaway time:[ ], , ,−−Transit time increasing: [−−Transit time (decreasing): [

],

,
],

−− The current 'Transit time increasing' differsfrom the reference value by the amountentered in 'Valve end position limit'.
−− The current 'Transit time (decreasing)'
differs from the reference value by theamount entered in 'Valve end position
limit'.
−− The valve end position is not reached.

,,amount entered in 'Travel time assessment
limit'.

,−−Final travel/angle value not reached:[ ], , ,

x [%]
w [%]
Valve end position(increasing)−−Increasing final travel/angle value:[ ], , ,−−Decreasing final travel/angle value:[ ], , ,5.2 Analysis and monitoring
The analysis pinpoints to a fault when at least
one of the following conditions is met whilethe valve is moving:−− The current 'Increasing breakaway time'differs from the reference value by theamount entered in 'Travel time assessment
limit'.
−− The current 'Decreasing breakaway time'differs from the reference value by theamount entered in 'Travel time assessment
limit'.
−− The current 'Transit time increasing' differsfrom the reference value by the amountentered in 'Travel time assessment limit'.

Valve end position(decreasing)
Breakaway time(decreasing)

Breakaway time(increasing)Transit time(decreasing)t [s]Transit time(increasing)Fig. 6: Analysis of diagnostics for on/off valve

If one of these conditions is met, the positioner generates an 'On/off valve status' message
according the selected status classification.
Diagnostics > Monitoring−−On/off valve status (Code 85):, , ,−− The current 'Transit time (decreasing)'
differs from the reference value by the

EB 8389-1 EN

39

On/off valve

5.3 Resetting single status messages
The message and the limit values are reset by
selecting and executing "Reset measured 'On/
off valve' values".
The positioner saves the reference analysis
and two further test analyses. The analysis of
the oldest test is deleted when another test is
performed.
Diagnostics > Service/maintenance > Reset−−Reset measured 'On/off valve' values

40

EB 8389-1 EN

Valve position x histogram

6 Valve position x histogram
The valve position histogram is a statisticalanalysis of the plotted valve positions. The histogram provides information about where thevalve mainly spends the majority of its time
during its service life and whether it shows arecent trend concerning changes in its operating range.
Data are recorded automatically 15 minutes
after initialization (regardless of the operating
mode selected). Data logging does not need
to be activated.
The positioner records the valve position every
second and assigns the data into predefinedvalve position classes. The distribution showing how often the sound level occurred within
a valve position class is shown in a bar graph.
−− 'Mean value': Average class assignmentof valve positions throughout 'Monitoring
duration'.

−− 'Number of measurement points': Total number of values recorded during the'Monitoring duration'.
−− 'Monitoring duration'
The measured data are saved every 24 hours
in the positioner.
Short-term monitoring
In order to be able to recognize any shortterm changes in valve position, the positioner records the valve positions according to theadjusted 'Sampling time' and analyses the last
100 measured values.
−− 'Mean time': Contains the average classassignment of valve positions for the last
100 measured values.
−− 'Adjusted monitoring duration': 100 x'Sampling time'
The positioner saves the valve positions in acircular buffer, which holds 100 measured
values at one time.

Fig. 7: Diagnostics > Monitoring/tests > Histograms > Valve position x histogramEB 8389-1 EN

41

Valve position x histogram

Note
Changing 'Sampling time' causes all existingmeasured values to be deleted from the circular buffer.
Defining parameters
1. Set the 'Sampling time' for the short-termmonitoring.
2. Select classification for status messages.
See u Section 6.1.
Diagnostics > Monitoring/tests > Histograms> Valve position x histogram > Short-termmonitoring
1. −−Sampling time: Adjustable as required,[00:14:24 d.h:min:s]
Device settings > Alarm settings > Statusclassification > Valve position
2. Manipulated variable range−−Mainly near CLOSED position:[ ], , ,−−Mainly near max. OPEN position:[ ], , ,−−Mainly in CLOSED position:[ ], , ,Change in manipulated variable range:−−Operating range shifted to CLOSED
position: [ ], , ,−−Operating range shifted to max. OPEN
position: [ ], , ,

42

],

,

Analysis of the histogram for control valves
starts one hour after the monitoring period
begins. No analysis is performed for on/off
valves.
If the control valve mainly works during themonitoring duration near or in one of the end
positions, the positioner generates the 'Manipulated variable range' message with theselected status classification.
For analysis of the short-term monitoring, acomplete set of data (100 measured values)
is required. The analysis is only active when
the sampling time setting is greater or equal
to one minute.
The positioner generates the 'Change in manipulated variable range' message with theselected status classification whenever a trend
showing a change in the operating range isfound from the analysis of the histogram andthe short-term monitoring.
Diagnostics > Monitoring > Valve position−−Manipulated variable range:−−Mainly near max. OPEN position:[ ], , ,−−Short-term change: [6.1 Analysis and monitoring

,

,

,

−−Change in manipulated variable range:
, ,

,
,

6.2 Resetting single status messages
The 'Manipulated variable range' and the'Change in manipulated variable range' messages can be reset by selecting and executing
the command "Reset 'Reset valve position x
histogram". This command resets all diagnos-

EB 8389-1 EN

Valve position x histogramtic parameters and measured data of the histogram and the short-term monitoring.
By selecting and executing the command "Reset 'Short-term valve position x histogram",the diagnostic parameters and measured datain the Short-term monitoring folder are reset.
Diagnostics > Service/maintenance > Reset−−Reset 'Valve position x histogram'−−Reset 'Short-term valve position x histogram'EB 8389-1 EN

43

Set point deviation e histogram

7 Set point deviation e histogram
The set point deviation histogram contains astatistical analysis of any set point deviations
recorded. It provides information on to which
extent a set point deviation has occurred during the valve service life and whether faults
may occur due to a restricted operating range
or due to seat leakage.
Data are recorded automatically 15 minutes
after initialization (regardless of the operating
mode selected). Data logging does not need
to be activated.
The positioner records the set point deviation
every second and assigns the data into predefined classes. The distribution showing how
often the set point deviation remained withina class is shown in a bar graph.
−− 'Mean value': Average class assignmentof set point deviation throughout 'Monitoring duration'.

−− 'Number of measurement points': Total number of values recorded during the'Monitoring duration'.
−− 'Monitoring duration'
The measured data are saved every 24 hours
in the positioner.
Short-term monitoring
In order to be able to recognize any shortterm changes in set point deviation, the positioner records the set point deviation according to the adjusted 'Sampling time' and analyses the last 100 measured values.
−− 'Mean time': Contains the average classassignment of set point deviations for thelast 100 measured values.
−− 'Adjusted monitoring duration': 100 x'Sampling time'
The positioner saves the set point deviations ina circular buffer, which holds 100 measured
values at one time.

Fig. 8: Diagnostics > Monitoring/tests > Histograms > Set point deviation e histogram44

EB 8389-1 EN

Set point deviation e histogram

Note
Changing 'Sampling time' causes all existingmeasured values to be deleted from the circular buffer.
Defining parameters
1. Set the 'Sampling time' for the short-termmonitoring.
2. Select classification for status messages.
See u Section 7.1.
Diagnostics > Monitoring/tests > Histograms> Set point deviation e histogram > Shortterm monitoring
1. −−Sampling time: Adjustable as required,[00:14:24 d.h:min:s]
Device settings > Alarm settings > Statusclassification > Valve
2. Seat leakage−−May exist: [

],

,

,

Device settings > Alarm settings > Statusclassification > Valve position
Manipulated variable range limitation−−Lower: [

],

,

,

−−Upper: [

],

,

,

−−No change possible: [],,Positioner-valve linkage−−Travel transmission not optimal:[ ], , ,,7.1 Analysis and monitoring
Ideally, the set point deviation should be nearly 0 %.
Set point deviations greater than 1 % following in quick succession pinpoint to a limitation of the upper operating range. In thiscase, the positioner generates the 'Manipulated variable range limitation' and 'Positionervalve linkage' messages with the selected status classifications.
Set point deviations smaller than 1 % following in quick succession pinpoint to a limitationof the lower operating range or to seat leakage. The positioner generates the 'Manipulated variable range limitation', 'Positioner-valve
linkage' and 'Seat leakage' messages with theselected status classifications.
If almost all set point deviations during theshort-term monitoring are greater than 1 %or smaller than –1 %, this may indicated thatthe actuator or valve stem is jammed. The positioner generates the 'Manipulated variable
range limitation' and 'Positioner-valve linkage' messages with the selected status classifications.
Diagnostics > Monitoring > Valve−−Seat leakage:,,

Diagnostics > Monitoring > Valve position−−Manipulated variable range limitation:, ,−−Positioner-valve linkage:

EB 8389-1 EN

,

,

,

,

,

45

Set point deviation e histogram

7.2 Resetting single status messages
The 'Seat leakage', 'Manipulated variable
range limitation' and 'Positioner-valve linkage' messages can be reset by selecting andexecuting the command "Reset 'Set point deviation e histogram" or "Reset 'Short-term set
point deviation e histogram".
By selecting and executing the "Reset 'Set
point deviation e histogram" command, alldiagnostic parameters and measured data of
the histogram and the short-term monitoring
are reset.
By selecting and executing the command "Reset 'Short-term set point deviation e histogram", the diagnostic parameters and measured data in the Short-term monitoring folder are reset.
Diagnostics > Service/maintenance > Reset−−Reset 'Set point deviation histogram e'−−Reset 'Short-term set point deviation e histogram'46

EB 8389-1 EN

Set
Cycle
point
counter
deviation
histograme histogram

Stem sealâââ

Self-adjustingâ

Adjustableâ

Other, -/-Bellows sealâ
START-UP

Max. cycle count

â

â

â

â

â

Status classification (NE 107)
External leakage possibly to be
expected soon

Status classification (NE 107)
External leakage possibly to be
expected soonââ
Determining the cycle height

Determining the cycle spans

x [%]

x [%]
1

3

2

1

2

4
3

4

t [s]

t [s]

PROCESSââ

Dynamic stress factorâ

Dynamic stress factor

Dynamic stress factor >90 %âDynamic stress factor >90 %Analysis (NE 107)/
logged by operating hours counter

Analysis (NE 107)/
logged by operating hours counter

Packing leakage

Packing leakage

âReset 'Cycle counter histogram'48

EB 8389-1 ENCycle counter histogram

8 Cycle counter histogram
The cycle counter histogram provides a statistical analysis of the cycles. As a result, the cycle
counter also provides information on the dynamic stress of a bellows seal and/or packing.
Data are recorded automatically 15 minutes
after initialization (regardless of the operating
mode selected). Data logging does not need
to be activated.
The positioner records the number of cycle
spans when the stem seal setting is set to 'Liveloaded', 'Adjustable', 'Other' or '-/-'. A valve
cycle span starts at the point where the valve
stroke changes direction until the point where
it changes direction again. The valve stroke
between these two changes in direction is thecycle span.
The positioner records the cycle height whenthe 'Stem seal’ setting is set to 'Bellows seal'.
The cycle height is the travel performed between two changes in direction.

The cycle spans or cycle heights are assigned
to classes. The distribution showing how often the cycle span or height occurred within aclass is shown in a bar graph.
−− 'Mean value': Average class assignmentof cycle height calculated from the 'No.
of cycles'−− 'No. of cycles'
The measured data are saved every 24 hours
in the positioner.
Defining parameters
1. Select the type of stem seal.
(*When 'Other' is selected as the stem
seal, the additional parameter 'Max. cycle count' must also be set).
Device settings > Alarm settings
1. −− Stem seal: [-/-], Live-loaded, Adjustable,
Bellows seal, Other* −−Max. cycle count:
1 to 1000000000, [1000000]

Fig. 9: Diagnostics > Monitoring/tests > Histograms > Cycle counter histogramEB 8389-1 EN49

Cycle counter histogram

Short-term monitoring
To recognize short-term changes in the cycle
spans or cycle height, the positioner analyzes the last 100 cycle heights or cycle spans.
The positioner saves the cycle heights or cycle spans in a circular buffer, which holds 100
measured values at one time.
−− 'Mean time': Contains the average classassignment for the last 100 measured values.
Defining parameters
1. Select classification for status messages.
Device settings > Alarm settings > Statusclassification > Valve
1. Packing leakage−−Possibly to be expected soon: [
,

],

,

8.1 Analysis and monitoring
The load on the bellows and/or packing canbe read from the 'Dynamic stress factor' parameter. The value is determined from the cycle spans or cycle heights and takes into account the type of packing used in the valve.
A 'Packing leakage' message is generated
with the selected status classification whenever:−− The number of measured cycle spans exceeds 450000 when 'Live-loaded' is selected as the stem seal.

−− The number of measured cycle spans exceeds 90 % of the 'Max. cycle count' when
'Other' is selected as the stem seal.
−− The number of measured cycle heights exceeds 180000 when 'Bellows seal' is selected as the stem seal.
Measured process values−−Dynamic stress factor
Diagnostics > Monitoring > Valve−−Packing leakage:

,

,

,

8.2 Resetting single status messages
The 'Packing leakage' message is reset by selecting and executing the command "Reset'Cycle counter histogram" or "Reset 'Shortterm cycle counter histogram".
By selecting and executing the "Reset 'Cycle
counter histogram" command, all measured
data of the histogram and the short-term monitoring as well as the 'Dynamic stress factor'
are reset.
By selecting and executing the command "Reset 'Short-term cycle counter histogram", themeasured data in the Short-term monitoring
folder are reset.
Diagnostics > Service/maintenance > Reset−−Reset 'Cycle counter histogram'−−Reset 'Short-term cycle counter histogram'−− The number of measured cycle spans exceeds 180000 when 'Adjustable' is selected as the stem seal.

50

EB 8389-1 ENCycleLeakagecounter
sensorhistogram

Requirements– Positioner accessories identification:
Leakage sensor– Activate CLOSED end position: OnâManufacturer referencewith specified standard conditions

Process referencewith process conditions

User-definedáâ
Settling time before sound levelmeasurement

Sensitivity soundlevel lower

â

START-UPàá

Set points, sensitivity sound level

Cancelâ

Level (x)diagram

Start
â á

ß

Phase 3

ß Not successful

ß Successful

Phase 2Phase 1

Successfulââ

Reset 'Leakage sensor
manufacturer reference'

Reset 'Leakage sensor process
reference'ââ

Alarm settings

ßResponse time, preset alarm limits

Recommended:
10 dB, 15 dB, 25 dB

Status classification (NE 107)
Alarm limit 2
exceeded

Alarm limit 3
exceededx [%]Determining the mean sound levels while thevalve is tightly shut
Cyclic analysis of sensor level, e.g. overdynamic HART® variables

PROCESS0
Mean sound level exceeds
alarm limit 2

Alarm limits 1,
2, 3

t [s]

â

â

Mean sound level exceeds
alarm limit 3

Analysis (NE 107)/logged by operating hours counter
Seat leakage
âReset 'Leakage sensor process reference'52

EB 8389-1 EN

Leakage sensor

9 Leakage sensor
By upgrading the positioner with a leakage
sensor, it is possible to detect seat leakage
when the valve is in the closed position. To
achieve this, the leakage sensor measures thesound pressure level (dB) while the valve istightly shut and compares the current soundpressure level with predefined alarm limits.
The positioner generates a message if the current sound pressure level exceeds one of thealarm limits.
Requirements for using the seat leakage
sensor:
1. A leakage sensor is mounted to the valve.
Refer to the standard mounting and operating instructions of the positioner
u EB 8384-6

2. The leakage sensor option has been selected.
3. The tight-closing function has been activated.
4. The leakage sensor has been put into operation. See u Section 9.1.
Start-up > Reference graphs > Leakage
sensor2. −−Positioner accessories identification:
Leakage sensor
Device settings > Positioner > Transfer
characteristic or Transfer characteristic on/off
3. −−Activate CLOSED end position (Code 14):On−−CLOSED end position (Code 14):0.0 to 49.9 %, [1.0 %]Alarm limit 3

Alarm limit 2

Alarm limit 1

Fig. 10: Start-up > Reference graphs > Leakage sensor > Manufacturer reference

EB 8389-1 EN53

Leakage sensor

9.1 Start-up of the leakage
sensorTo be able to use the full scope of functions,the response of the leakage sensor to standardized conditions and to the prevailing process conditions must be measured. Furthermore, the limit to activate the alarm must beentered.

9.1.1

ing a set point and after the 'Settling time before sound level measurement' has elapsed,the leakage sensor measures the sound pressure level.
If the difference between two neighboring set
points is larger or equal to the adjusted 'Sensitivity sound level', the valve does not moveto the next set points. Instead, Phase 2 starts.

Manufacturer reference

The manufacturer reference (u Fig. 10) measures the response of the leakage sensor. We
recommend performing the manufacturer reference test. On request, it can also be performed by SAMSON and must not be performed again. In this case, the standard conditions are:
• Medium = air• Input pressure = 4 bar• Output pressure = atmosphere
Default values of alarm limits are A2 = 15 dB
and A3 = 25 dB. If the leakage sensor has
been fitted later onto the valve, the alarm
limits must be manually configured or adjusted by performing a manufacturer or process reference test before the leakage sensor
can be used. See u Section 9.1.2.

Phase 1 successful: The sound pressure levelexceeded the adjusted 'Sensitivity sound level'(10 dB) between set points 4 and 5. Phase 2
starts.

If the 'Sensitivity sound level' is not reachedafter the valve has moved to all eleven set
points, the test is canceled. The canceled test
is logged with a time stamp. The 'Test information' reading indicates 'Test failed: sound levelchange too small'.

While the manufacturer reference test is running, the parameters listed below are automatically deactivated:−− Activate CLOSED end position−− Activate ramp function
Phase 1: The valve moves to eleven defined
set points one after the other. After reach-54

Phase 1 not successful: The difference in soundpressure level between two neighboring set
points is smaller than the 'Sensitivity sound level'(10 dB). The reference test is canceled.

EB 8389-1 EN

Leakage sensor

Phase 2: A 0.30 % band is placed aroundthe last set point that the valve moved to. One
third of this band lies in front of the set pointthat the valve moved to and two thirds of theband lies behind it. The band itself is subdivided into eleven fixed points. Each fixed
point is located at a distance of 0.03 % to
the next point. The valve moves to the new
fixed points one after the other. After reaching a fixed point and after the 'Settling time
before sound level measurement' has elapsed,the leakage sensor measures the sound pressure level.
The manufacturer reference test is successfulwhen the difference between the first and last
newly defined points is larger or equal to theadjusted 'Sensitivity sound level'.

Phase 2 not successful: The difference in soundpressure level between the first and last newly
defined points is lower than 'Sensitivity soundlevel' (10 dB). Phase 3 starts.

Phase 3: The valve moves to the set points
valid for phase 1 one after the other. This isplotted in a sound level vs. travel graph. The
graph shows where the point of activation isand to which value the 'Sensitivity sound level'
must be reduced to allow the test to be completed successfully.
Defining parameters

Phase 2 successful: The 'Sensitivity sound level'(10 dB) is reached between the first and last
newly defined points. The manufacturer test is
successfully completed.

If the 'Sensitivity sound level' is not reachedafter the valve has moved to all eleven newly defined points, then the change in soundpressure level is too low. In this case, phase3 starts.

EB 8389-1 EN

Note
The parameters can only be defined in
TROVIS-VIEW 4 after the 'Positioner
accessories identification' has been set to'Leakage sensor'.
1. Switch to manual mode.
2. Define the parameters for the manufacturer reference test. Refer to Note concerning
editing set points.
3. Start manufacturer reference test.
The start of the reference test is documented in the Time stamp.
'D8' and 'TEST' are indicated in alternating sequence on the positioner display.

55

Leakage sensor

Start-up
1. −−Enter operating mode (Code 0): ManualStart-up > Reference graphs > Leakage
sensor > Manufacturer reference
2. −−Settling time before sound level measurement: 1 to 255 s, [5 s]−−Sensitivity sound level: 3 to 255 dB, [10 dB]−−Edit set points: 0.00 to 100.00 %[1: 0.00 %; 2: 0.10 %; 3: 0.20 %;4: 0.30 %; 5: 0.40 %; 6: 0.50 %; 7: 0.60 %;8: 0.70 %; 9: 0.80 %; 10: 0.90 %,11: 1.00 %]3. −−Start manufacturer reference

Note
By selecting and executing 'Cancel manufacturer reference' or by pressing the rotary
pushbutton, the manufacturer reference test
is canceled (Test information = 'Test canceled
manually'). After canceling the manufacturer reference test, the positioner remains in the
manual mode.
In TROVIS-VIEW 4 the test information andprogress flag of the manufacturer reference
test are displayed. When the manufacturer
reference test has been successfully completed, the Test information reading indicates 'Test
completed successfully'.
Note concerning editing set points−− The entered set points must continuously
increase from 'Set point 1' to 'Set point
11'.

56

−− The valve moves to the set points in stepsof 0.1 %. Set points must be rounded up
to two decimal places.
−− User-defined settings can be saved forother functions (e.g. process referencetest) in a file.

9.1.1.1 Assessment
While the manufacturer reference test is
running, the positioner determines three alarm
limits. The relation between Valve position x[%] and Sound level [dB] is shown in TROVISVIEW 4:−− Relation 1: Valve position and sound level at 0 % position−− Relation 2: Valve position and sound levelat the point where the curve in the 'Leakage sensor manufacturer reference' graphstarts to rise monotonously−− Relation 3: Valve position and sound levelat the last measurement

9.1.1.2 Resetting single status
messages
The short-term monitoring (parameters, measured data and analysis) can be reset by selecting and executing the command "Reset'leakage sensor manufacturer reference".
If the test is restarted and a test analysis has
already been performed, the analysis of theold manufacturer reference test is overwritten.
Diagnostics > Service/maintenance > Reset−−Reset 'Leakage sensor manufacturer reference'

EB 8389-1 EN

Leakage sensor

9.1.2

Process reference

The process reference test (Fig. 11) measures
the response of the leakage sensor to process
conditions. Process medium, inlet and outletpressures as well as the process environment
can have an effect on the sensor's response.
The alarm limits are determined from the measured data.
The process reference test is performed andanalyzed in the same manner as the manufacturer reference test described in u Section 9.1.1. This test must be performed after
the valve has been installed and the plant has
been commissioned.
If it is not possible to perform the process reference test, the user-defined alarm limits canbe entered. See u Section 9.1.2.2.

While the process reference test is running,
the parameters listed below are automatically deactivated:−− Activate CLOSED end position−− Activate ramp function
Phase 1: The valve moves to eleven defined
set points one after the other. After reaching a set point and after the 'Settling time before sound level measurement' has elapsed,the leakage sensor measures the sound pressure level.
If the difference between two neighboring set
points is larger or equal to the adjusted 'Sensitivity sound level', the valve does not moveto the next set points. Instead, Phase 2 starts.

Alarm limit 3

Alarm limit 2
Alarm limit 1

Fig. 11: Start-up > Reference graphs > Leakage sensor > Process reference

EB 8389-1 EN

57

Leakage sensor

fixed points one after the other. After reaching a fixed point and after the 'Settling time
before sound level measurement' has elapsed,the leakage sensor measures the sound pressure level.

Phase 1 successful: The sound pressure levelexceeded the adjusted 'Sensitivity sound level'(10 dB) between set points 4 and 5. Phase 2
starts.

If the 'Sensitivity sound level' is not reachedafter the valve has moved to all eleven set
points, the test is canceled. The canceled test islogged with a time stamp and the 'Test information' reading indicates 'Test failed: soundlevel change too small'.

Phase 1 not successful: The difference in soundpressure level between two neighboring set
points is smaller than the 'Sensitivity sound level'(10 dB). The process reference test is canceled.

Phase 2: A 0.30 % band is placed aroundthe last set point that the valve moved to. One
third of this band lies in front of the set pointthat the valve moved to and two thirds of theband lies behind it. The band itself is subdivided into eleven fixed points. Each fixed
point is located at a distance of 0.03 % to
the next point. The valve moves to the new

58

Phase 2 successful: The 'Sensitivity sound level'(10 dB) is reached between the first and last
newly defined points. The process reference test is
successfully completed.

The process reference test is successful when
the difference between the first and last newly defined points is larger or equal to the adjusted 'Sensitivity sound level'.
If the 'Sensitivity sound level' is not reachedafter the valve has moved to all eleven newly defined points, then the change in soundpressure level is too low. In this case, phase3 starts.

Phase 2 not successful: The difference in soundpressure level between the first and last newly
defined points is lower than 'Sensitivity soundlevel' (10 dB). Phase 3 starts.

EB 8389-1 EN

Leakage sensor

Phase 3: The valve moves to the set points
valid for phase 1 one after the other. This isplotted in a sound level vs. travel graph. The
graph shows where the point of activation isand to which value the 'Sensitivity sound level'
must be reduced to allow the test to be completed successfully.
Defining parameters
Note
The parameters can only be defined in
TROVIS-VIEW 4 after the 'Positioner
accessories identification' has been set to'Leakage sensor'.
1. Switch to manual mode (Code 0 = MAN).
2. Define the parameters for the process reference test. Refer to Note concerning editing set points.
3. Start process reference test.
The start of the reference test is documented in the Time stamp.
'D9' and 'TEST' are indicated in alternating sequence on the positioner display.
Start-up
1. −−Enter operating mode (Code 0): ManualStart-up > Reference graphs > Leakage
sensor > Process reference
2. −−Settling time before sound level measurement: 1 to 255 s, [5 s]−−Sensitivity sound level: 3 to 255 dB, [10 dB]−−Edit set points: 0.00 to 100.00 %[1: 0.00 %; 2: 0.10 %; 3: 0.20 %; 4: 0.03 %;5: 0.04 %; 6: 0.05 %; 7: 0.06 %; 8: 0.07 %;9: 0.08 %; 10: 0.09 %, 11: 1.00 %]EB 8389-1 EN

3. −−Start process reference

Note
By selecting and executing 'Cancel reference
reference' or by pressing the rotary pushbutton, the process reference test is canceled (Testinformation = 'Test canceled manually'). Afterthe test has been canceled, the positioner remains in manual mode.
In TROVIS-VIEW 4 the test information andprogress flag of the test are displayed. Whenthe process reference test has been successfully completed, the Test information reading indicates 'Test completed successfully'.
Note concerning editing set points−− The entered set points must continuously
increase from 'Set point 1' to 'Set point
11'.
−− The valve moves to the set points in stepsof 0.1 %. Set points must be rounded up
to two decimal places.
−− User-defined settings can be saved forother functions (e.g. another process reference test) in a file.

9.1.2.1 Assessment
While the process reference test is running,
the positioner determines three alarm limits.
The relation between Valve position x [%] andSound level [dB] is shown in TROVIS-VIEW 4:−− Relation 1: Valve position and sound level at 0 % position−− Relation 2: Valve position and sound levelat the point where the curve in the 'Leak-

59

Leakage sensor

age detection process reference' graphstarts to rise monotonously−− Relation 3: Valve position and sound levelat the last measurement

9.1.2.2 Alarm settings
After connecting the leakage sensor and performing the manufacturer and process reference tests, the positioner is able to pinpoint
any seat leakage. To do this, it records thesound level in closed-loop operation while thevalve is tightly shut. The seat leakage monitoring is performed automatically while the process is running.
The alarm limits detected in the manufacturer reference test, process reference test or user-defined settings can be selected. When user-defined limits are entered, the alarm limits
must rise continuously from 'Alarm limit 1' to'Alarm limit 3'.

During closed-loop operation, the meansound levels while the valve is tightly shut arecompared to the alarm limits. Which meansound level is to be used for comparison canbe selected in 'Response time':−− Very quick: The mean value calculated
from the current sound level and from thelast four sound levels measured while thevalve is tightly shut is used for monitoring(Fig. 12: Tight-closing event 31 and soundlevel E to I).
−− Quick: The mean value calculated from allsound levels measured while the valve istightly shut is used for monitoring (Fig. 12:
Tight-closing event 31 and sound level Ato I).

x [%]

1

2

3

4 … 29

30

31

0

t [s]

[dB]
D
A

B

C

F
E

GH
I

t [s]

Fig. 12: Tight-closing process and calculated mean values for analysis of the process reference test60

EB 8389-1 EN

Leakage sensor−− Slow: The mean value calculated fromthe last 30 sound levels measured during
short-term monitoring (see uSection 9.2)
is used for monitoring (Fig. 12: Tight-closing event 2 to Tight-closing event 31 withall sound levels).
−− Very slow: The mean value calculated
from all the sound levels measured duringlong-term monitoring (see u Section 9.3)
is used for monitoring (Fig. 12: Tight-closing event 1 to Tight-closing event 31 withall sound levels).
The 'No alarm triggering' setting deactivatesthe alarm function.
Defining parameters
1. Define alarm parameters.
2. Select classification for status messages.
See u Section 9.1.2.3.
Start-up > Reference graphs > Leakage
sensor > Process reference
1. −−Response time: [No alarm triggering], Veryquick, Quick, Slow, Very slow−−Preset alarm limits 1): [Manufacturer
reference], Process reference, User-defined
Device settings > Alarm settings > Statusclassification > Valve

9.1.2.3 Monitoring
If the determined mean sound level exceeds
the 'Alarm limit 2', the positioner generates
a 'Seat leakage' message with status classification selected for 'Alarm limit 2 exceeded'.
If the determined mean sound level exceeds
the 'Alarm limit 3', the positioner generates
a 'Seat leakage' message with status classification selected for 'Alarm limit 3 exceeded'.
Diagnostics > Monitoring > Valve−−Seat leakage:

,

,

,

9.1.2.4 Reset
The process reference test (diagnostic parameters, measured data and analysis) and the'Seat leakage' message can be reset by selecting and executing the command "Reset 'leakage sensor process reference".
If the test is restarted and a test analysis has
already been performed, the analysis of theold process reference test is overwritten.
Diagnostics > Service/maintenance > Reset−−Reset 'Leakage sensor process reference'

2. −−Alarm limit 2 exceeded:[ ], , ,−−Alarm limit 3 exceeded:[ ], , ,1)

On selecting the alarm limit 'User-defined',
we recommend checking the correct settingof the alarm limits using an operating time of
one to three months based on the measured
data in 'Sound level monitoring' diagram (seeu Section 9.4).

EB 8389-1 EN

61

Leakage sensor

9.2 Short-term monitoring
Short-term monitoring provides an insight into short-term changes in the sound level whilethe valve is tightly shut.
Data are recorded in the background regardless of the operating mode selected. Data logging does not need to be activated.
The leakage sensor records the sound level
when the valve leaves the tightly shut position
or whenever the sound level changes by 2 dB.
A mean value is calculated from the recorded
sound level and last four recorded sound levels.
If this value deviates from the previous meanvalue by 'Sensitivity sound level', the newmean value is saved in the short-term monitoring.
The last 'Mean value' recorded in the shortterm monitoring is indicated.
The positioner saves the mean values of thesound level and valve travel in a circular buffer, which holds 30 measured values at one
time together with a time stamp. The savedvalues can be read in the Measured data assessment folder.
Defining parameters
1. Enter the sensitivity sound level.
Diagnostics > Monitoring/tests > Leakage
sensor > Short-term monitoring
1. −−Sensitivity sound level: 3 to 255 dB, [3 dB]

Fig. 13: Start-up > Reference graphs > Leakage sensor > Short-term monitoring62

EB 8389-1 EN

Leakage sensor

9.2.3

Resetting single status
messages

The short-term monitoring (diagnostic parameters, measured data and analysis) can be reset by selecting and executing the command"Reset 'Short-term leakage sensor monitoring". The data in the Measured data assessment folder are reset as well.
Diagnostics > Service/maintenance > Reset−−Reset 'Short-term leakage sensor monitoring'

9.3 Long-term monitoring
To obtain a sound level trend over a long period of time, the long-term monitoring contains
all the mean values saved in the short-termmonitoring since the last reset:−− 'Mean value': The average sound levelcalculated from 'No. of measuring points'−− 'No. of measuring points'
Data are recorded in the background regardless of the operating mode selected. Data logging does not need to be activated.

9.3.1

Resetting single status
messages

The measured data of the long-term monitoring are reset by selecting and executing thecommand "Reset 'Leakage detection - Longterm monitoring".
Diagnostics > Service/maintenance > Reset−−Reset 'Leakage sensor - Long-term monitoring'

EB 8389-1 EN63

Leakage sensor

9.4 Sound level(x)The sound level monitoring is shown in a histogram. The distribution of recorded soundlevels within fixed classes of valve position x
is revealed.
The leakage sensor records the sound level
every second and assigns the data into predefined valve positions classes. The distribution showing how often the sound level occurred within a valve position class is shownin a bar graph.

9.4.2

Resetting single status
messages

The measured data of the sound level monitoring are reset by selecting and executing
the command "Reset 'Leakage sensor soundlevel(x)".
Diagnostics > Service/maintenance > Reset−−Reset 'Leakage sensor sound level(x)'Data are recorded in the background regardless of the operating mode selected. Data logging does not need to be activated.

Fig. 14: Start-up > Reference graphs > Leakage sensor > Level(x)64EB 8389-1 EN

Leakage
Course ofsensorend position

Prerequisite– Activate CLOSED end position: On

START-UPâ
Recording thresholdâ
Alarm settings (NE 107)
Course of end position

x [%]

0

t [s]

Valve signature complete?
u Section 4.1

ß NO YESâPROCESSàààFirst zero point =Reference

Subsequent zero calibration over
Code 6 - ZPßZero calibration

Zero shifted monotonically increasing/decreasing,alternatingâ
Status classification (NE 107)/logged by operating hours counter
Course of end position

á

66

â

â

Reset 'Reference values for course oflower end position'

Reset 'Course of lower end position'

EB 8389-1 EN

Course of end position

10 Course of end position
The course of end position is used to detectan alternating zero point or a creeping zero
point shift due to seat and plug wear or dirt
between the seat and plug.
Data are recorded in the background regardless of the operating mode selected if the tightclosing function (Code 14) is active. Data logging does not need to be activated.
The course of the end position records thevalve position x and the signal pressure pout
together with the time stamp by the operating hours counter when the valve moves to thelower end position. The new recorded valve
position is compared to the last saved zero
point. If it differs by the 'Recording threshold'from the last value, the data of the new zero
point are saved.
A graph of the recorded valve positions at thelower end position is plotted over time.
The positioner saves the valve positions in acircular buffer, which holds 30 measured values at one time. The recorded measured data are listed in the Lower end position folder.
Defining parameters
1. Activate tight-closing function.
2. Define 'Recording threshold'.
3. Select classification for status messages.

Fig. 15: Diagnostics > Monitoring/tests > Course of end position

EB 8389-1 EN

67

Course of end position

Device settings > Positioner > Transfer
characteristic or Transfer characteristic on/off
1. −−Activate CLOSED end position (Code 14):On−−CLOSED end position (Code 14):0.0 to 49.9 %, [1.0 %]Device settings > Alarm settings

3. Course of end position−−Monotonically increasing: [

],

,

,

−−Monotonically decreasing: [

],

,

,

,

,

,

,

10.2 Resetting single status messages

Device settings > Alarm settings > Statusclassification > Valve position],

Diagnostics > Monitoring > Valve position−−Course of end position:

2. −−Recording threshold:0.10 to 5.00 %, [0.25 %]−−Alternating: [If the analysis of course of the end position
pinpoints to a fault, the positioner generates
the 'Course of end position' message with theselected status classification.

,

10.1 Analysis and monitoring
A reference zero point must be recorded toanalyze the course of the end position. Thisis recorded during the valve signature reference test (see u Section 4.1). In case a reference test has not been performed, the first zero point that the valve moved to serves as thereference value. The reference value is represented by a straight line in the course of end
position graph.

The 'Course of end position' message and themeasured data for the course of the end position can be reset by selecting and executing"Reset 'Course of lower end position".
If only the reference zero point is to be reset,
select and execute "Reset 'Reference values forcourse of lower end position".
Diagnostics > Service/maintenance > Reset−−Reset 'Course of lower end position'−−Reset 'Reference values for course of lower end
position'

Note
If the reference value has been reset by selecting and executing "Reset 'Reference values
for course of lower end position" (see u Section 2.1.1), the first zero point that the valve
moves to after the reset serves as the new reference value, provided it does not exceed the'Zero limit' (Code 48 - d5).

68

EB 8389-1 EN

Valve dead band

11 Valve dead band
The difference in set point w that causes aminimal change in the valve position x is
termed ‘dead band’.
The valve dead band is affected by the friction hysteresis and the elastic processes in thevalve stem packing.
The test is started in the manual mode.
The positioner specifies the set point w in adefined test range ('Lower range value' and'Stop') in small steps and records the responseof the valve position x after waiting a 'Waiting time after step change'. The step height isdetermined automatically from the number ofmeasured values ('No. until reversing') andthe defined test range. The ascendent and descendent are plotted within the test range. The

response of the valve position x to the change
in set point (∆w) is plotted in a graph.
The dead band is analyzed in the positioner when a step height is smaller than 0.2 %.
−− 'Mean dead band': Average change in set
point that causes a minimal change in thevalve position.
−− 'Min. dead band': Minimum change in set
point that causes a minimal change in thevalve position.
−− 'Max. dead band': Maximum change inset point that causes a minimal change inthe valve position.

Fig. 16: Diagnostics > Monitoring/tests > Dynamic tests > Valve dead bandEB 8389-1 EN

69

Valve dead band

Defining parameters
1. Switch to manual mode (Code 0 = MAN).
2. Select test parameters.
3. Start test.
The 'Test information' status indicates 'Test
active'. 'D3' and 'TEST' are indicated inalternating sequence on the positioner display.
'Function check'is activated as thecondensed state.
Diagnostics > Service/maintenance >1. Operating mode

11.1 Resetting single status messages
The diagnostic parameters and measured data of the last test are reset by selecting andexecuting the command "Reset 'Valve deadband".
If the test is restarted and a test analysis has
already been performed, the analysis of theold test is overwritten.
Diagnostics > Service/maintenance > Reset−−Reset 'Valve dead band'−−Enter operating mode (Code 0): Manual
Diagnostics > Monitoring/tests > Dynamic
tests > Valve dead band

2. −−Lower range value: 0.0 to 100.0 %,[50.0 %]−−Stop: 0.0 to 100.0 % [52.0 %]−−Waiting time after step change:
0.1 to 25.0 s, [1.0 s]−−No. until reversing: 1 to [50]3. −−Start test

Note
Cancel the test by right-clicking 'Cancel test'
and selecting 'Execute' or by pressing the rotary pushbutton at the positioner. After the test
has been canceled, the positioner remains inmanual mode.
In TROVIS-VIEW 4 the test information andprogress flag of the test are displayed. The'Test information' status indicates 'Test not active' after the test is finished.

70

EB 8389-1 EN

Valve
Partialdeadstrokeband
test (PST)

Step response settings: Lower range value, Stop, Tolerance limit, Settling time
before starting test, Waiting time after step change, Sampling time, Number ofstep responses
Activate ramp function
â
â

No

Yes

x [%]

â

100

100

Ramp time (increasing)
Ramp time (decreasing)

90

90

t [s]

t [s]

â

START-UP

Cancelation conditions
Max. test
durationMax. breakaway time

Perm. time until
step end

x monitoring value

Δp out monitoring value

PST tolerance
band

Status classification (NE 107)
PST/FSTâ
Observe start conditions(see page 73)âTest intervalââ
Test start

The valve has
The valve has not reached
not moved
the 'Stop'
beforepositionreaching before 'Perm.
Max. test
the max.
time until
durationbreakaway step end' has
exceededtime.
elapsed.

âââTEST/PROCESS

Other cancelation causes: solenoid valve triggered/forced venting active; Supply pressure
too low; Too much friction; Step start too large;
Change in set point; Current too low

â

â

â

â

â

Immediately

Time-controlled*â
PST startââFirst PST after defining parameters =­ReferenceâStart further PSTâThe signal
pressurechange has
exceededor fallen
below thereferencevalue.

The valve
position
deviationexceeds the
PST tolerance
band.

â

â

â

Other cancelation causes: solenoid valve triggered/forced venting active; Supply pressure
too low; Too much friction; Step start too large;
Change in set point; Current too lowâAnalysis (NE 107)/logged by operating hours counter
PST/FSTâ
Reset 'PST parameters'

72

The valve
positionhas fallen
below themonitoringvalue.

ââ* Note! The positioner is write-protected when tests are performed according to a schedule (local operation and operating software).

x [%]

â

EB 8389-1 EN

Partial Valvestrokedead
test (PST)
band

Start conditions of partial stroke test
Operating mode

â

â

â

SAFE

AUTO

MAN

â

â

â

Type of application

Type of application

Type of applicationââ

On/off orcontrol valveââ

On/off valve

Control valveââ

On/off orcontrol valveâ

25 %w > 'Fail-safe action
w < 'Fail-safe action<w>
limit'
limit'
50 %

x [%]
w [%]

50
25

∆t > 6 s

t [s]

â

â

â

PST not possible

PST 1,3,4)­possible

PST 1,2,4)­possibleâââ

PST not possible

PST 1,3,4,5)­possible

PST not possibleââ

Fail-safe action of actuator (failsafe position operating mode)

â

â

â

â

Operating point/valve position according to set point

PST started once over operator software
PST started once using rotary pushbutton on positioner
3)
Time-controlled PST start4)
PST started once over set point w, see u Section 5
1)
2)

EB 8389-1 EN73

Partial stroke test (PST)12 Partial stroke test (PST)The partial stroke test (PST) is particularly suitable for the status-oriented detection of malfunctions in pneumatic shut-off valves. As aresult, the probability of failure on demand(PFD) can be reduced and it may be possible
to extend maintenance intervals.
A shut-off valve normally in its end position
can be prevented from seizing up or getting
jammed. The breakaway torque must be overcome when the plug starts to move out of its
open position. This breakaway torque depends on the seal, deposits on the seat andplug, the process medium and friction in thevalve trim. After the breakaway torque has
been overcome, it can be assumed that thevalve is able to completely close. Recording
the test results additionally allows an analysisof the dynamic control response.

The partial stroke test can be performed once
(test immediately started) or, with an on/off
valve in automatic mode, regularly (time-controlled), provided the start conditions are met(see u page 73):−− A control valve is in the manual mode.
−− An on/off valve is in the manual or automatic mode. In automatic mode, thetest is only started when the Set point w
is greater than the 'Fail-safe action limit'(Code 49 - h2).
The following listed parameters are activated while the partial stroke test is being performed:−− Characteristic selection (Code 20): Linear−− Required transit time OPEN (Code 21):
Variable−− Required transit time CLOSED (Code 22):
VariableFig. 17: Diagnostics > Monitoring/tests > Dynamic tests > Partial stroke test (PST)74

EB 8389-1 EN

Partial stroke test (PST)

During the partial stroke test, the valve moves
from its current operating point to a defined'Stop' value and back to the initial position
again.
The change in travel can be performed either
in steps or in a ramp function (Fig. 18). For
the test in a ramp function, additionally theramp times for the increasing and decreasing
ramps need to be defined.
To perform a partial stroke test, the 'Lower
range value' must be near the current operating point ± 'Tolerance limit'.
After being activated, the test does not start
until the 'Settling time before starting test' haselapsed. Based on the operating point, thevalve moves until reaching the 'Stop' valve

x [%]Start PST

position. The valve remains in this position for
the time defined by the 'Waiting time after
step change' before performing a second stepchange in the opposite direction from 'Stop'to the operating position. The 'Sampling time'
defines the time interval between which themeasured values are recorded during the test.
Test cancelation conditions
Various cancelation conditions provide additional protection against the valve slamming
shut or moving past the end position. The positioner cancels the partial stroke test when
one of the following cancelation conditions isfulfilled:

Start PST

Operating point + Tolerance limit
Operating point
Lower range value
Operating point – Tolerance limit

Stop

t [s]

Settling time before
starting test

Settling time before
starting test

∆tdecreasing

Waiting time after
step change∆tdecreasing∆tincreasing‘Lower range value’ – ‘Stop’
100‘Lower range value’ – ‘Stop’
100

Waiting time after
step changex‘Ramp time (decreasing)’x‘Ramp time (increasing)’∆tincreasing

Fig. 18: Course of the partial stroke test with step response (left) and ramp function (right)

EB 8389-1 EN

75

Partial stroke test (PST)

Cancelation conditions, time-out−− 'Max. test duration': The test is canceledwhen the maximum permissible test duration is reached.
−− 'Max. breakaway time': The test is canceled when the valve position has reachedless than 10 % of the PST target travel after
the defined time has elapsed. This cancelation condition only becomes effective after it has been activated ("Activate 'Max.
breakaway time" = [Yes]).
−− 'Perm. time until step end': The test is canceled when the time entered in 'Settling
time before starting test' has elapsed before the valve has reached its 'Stop' position. This cancelation condition only becomes effective after it has been activated ("Activate 'Perm. time until step end"
= [Yes]).
Cancelation condition - valve position x (tocheck the valve position)−− 'x monitoring value': The test is canceled
as soon as the valve position falls below
the adjusted value. This cancelation condition only becomes effective after it has
been activated ('Activate x monitoring' =Yes).
Cancelation condition, signal pressure Δp out−− '∆p out monitoring value': The test is canceled if the change in signal pressure exceeds or falls below the reference value.
The reference value is made up of 'Δp out
reference value' and 'Δp out monitoringvalue'. This cancelation condition only becomes effective after it has been activated('Activate Δp out monitoring' = Yes).

76

The positioner determines the '∆p out reference value' from both signal pressures
issued at the start and end of the step. It
only applies to adjusted step change andramp values.
Cancelation condition, tolerance band−− 'PST tolerance band': The test is canceled
as soon as the deviation of the valve position (in relation to the step end value(Stop)) exceeds the adjusted PST tolerance
band. This cancelation condition only becomes effective after it has been activated ('Activate PST tolerance band monitoring' = Yes).
Note−−The partial stroke test must be performed
with deactivated cancelation conditions
for valves with double-acting actuator andpneumatic booster as well as for valves thathave been initialized using the SUB mode
(substitute calibration).
−−Excessive overshooting may occur in valvesfitted with boosters. In this case, the cancelation conditions 'x monitoring value' and'PST tolerance band' must be increased accordingly.
Additionally, the partial stroke test is canceledwhen one of the following events arises:−− Cancel internal solenoid valve/forced
venting: The test was canceled by the activation of the solenoid valve/forced venting function.
−− Canceled by control loop error: A control
loop error has occurred.

EB 8389-1 EN

Partial stroke test (PST)−− Set point start difference too high: During
the step change, 'Lower range value' isoutside the range (operating point ± 'Tolerance limit').
−− Set point change: Time-controlled start of
the test. Due to a set point change before
the step change, 'Lower range value' isoutside the range (operating point + 'Tolerance limit').
−− Current too low−− Supply pressure too low−− Electric current change: The partial stroke
test of a control valve is canceled when
the change in electric current ≥ 'Tolerance
band' (Code 19) arises.
The partial stroke test of an on/off valve iscanceled when the valve moves from theoperating position to the fail-safe position
or from the fail-safe position to the operating position due to a change in electric current.
Note
The 'Measured data storage out of memory' reading (Failure) is generated when the'Sampling time' is too low. After recording
100 measured values per variable, logging is
stopped, but the test continues until it is completed.
After the partial stroke test is canceled, the'PST status' reading indicates 'Not successful'.
The reason for cancelation is marked by the'Failure' message in the Measured data assessment folder (> Current test).
Defining parameters

EB 8389-1 EN

1. Define parameters for the partial stroke
test. See also u Note concerning setting
the PST diagnostic parameters. (The default settings partly depend on the closing
position ATO/ATC.)2. Define parameters for cancelation conditions.
3. Select classification for status messages.
4. Start the partial stroke test.
The 'Test information' status indicates 'Test
active'. 'D4' and 'TEST' are indicated inalternating sequence on the positioner display. 'Function check'is activated as
the condensed state.
1. Diagnostics > Monitoring/tests > Dynamic
tests > Partial stroke test (PST)−−Lower range value (Code 49 - d2): 0.0 to
100.0 %, [ATO: 100.0 %; ATC: 0.0 %]−−Stop (Code 49 - d3): 0.0 to 100.0 %[ATO: 90.0 %; ATC: 10 %]−−Tolerance limit: 0.1 to 10.0 %, [2.0 %]−−Activate ramp function (Code 49 - d4):
[Yes], No−−Settling time before starting test
(Code 49 - d7): [1] to 240 s−−Waiting time after step change(Code 49 - d8):
1.0 to 240.0 s, [2.0 s]−−Sampling time (Code 49 - d9):
0.2 to 250.0 s, [0.8 s]
Only when the ramp function is activated:−−Ramp time (decreasing) (Code 49 - d5):
0 to 9999 s, [600 s]−−Ramp time (increasing) (Code 49 - d6):
0 to 9999 s, [60 s]

77Partial stroke test (PST)

2. −−Max. test duration (Code 49 - E7):
30 to 25000 s, [90 s]−−Set point start difference too high:[ ], , ,−−Activate 'Max. breakaway time' [Yes], No−−Set point change: [],−−Max. breakaway time: 0.0 to 25000 s,[30.0 s]−−Current too low: [

],

,
,

,
,

−−Activate 'Perm. time until step end' [Yes], No−−Max. breakaway time exceeded:[ ], , ,−−Perm. time until step end:
0.0 to 25000 s, [70.0 s]−−Perm. time until step end exceeded:[ ], , ,−−Activate x monitoring (Code 49 - E0): [Yes],No−−Canceled by supply pressure:[ ], , ,−−x monitoring value (Code 49 - E1):
–10.0 to 110.0 %, [ATO: 0.0 %; ATC: 85 %]Diagnostics > Monitoring/tests > Dynamic
tests > Partial stroke test (PST)−−Activate Δp out monitoring (Code 49 - A8):[Yes], No−−Δp out monitoring value (Code 49 - A9):0.00 to 7.00 bar, [1.00 bar]−−Activate PST tolerance band monitoring (Code 49 - E5): Yes, [No]Device settings > Alarm settings > Statusclassification > PST/FST],−−Δp out cancelation: [

,

,
],

,

−−Tolerance band exceeded: [

,
],

,

,

−−Max. test duration exceeded:[ ], , ,−−Test canceled manually: [

],

,

,

−−Measured data memory full:[ ], , ,−−Enter test start (Code 49 - A2) =[Immediately]−−Start testOr:
(only when 'Type of application' = On/off
valve)−−PST tolerance band (Code 49 - E6):
0.1 to 100.0 %, [5.0 %]3. −−x cancelation: [4. Either:−−Enter test interval (Code 49 - A3):
[1 h] to 2345 d−−Enter test start (Code 49 - A2) = Timecontrolled! NOTICE
The positioner is write-protected when tests
are performed according to a schedule(local operation and operating software).
Code0
reading:
"O/C"
and
"PST"
in
alternating
sequence
Code 3 reading: "PST" blinks.

−−Cancel internal solenoid valve/forced
venting: [ ], , ,−−Canceled by control loop error:[ ], , ,78

EB 8389-1 EN

Partial stroke test (PST)

Note
Cancel the test by right-clicking 'Cancel test'
and selecting 'Execute' or by pressing the rotary pushbutton at the positioner. After the test
has been canceled, the positioner remains inselected mode. The 'PST status' reading indicates 'Not successful'.
In TROVIS-VIEW 4 the test information andprogress flag of the test are displayed. The'Test information' status indicates 'Test not active' after the test is finished.
Note concerning setting the PST diagnostic
parameters−− We recommend only to start the partial
stroke test when the valve is in the end
position. In on/off valves, the start value
must be the same as the operating point.
−− The 'Ramp time (increasing)' must be
greater than the corresponding value for'Min. transit time CLOSED' (Code 41) determined during initialization.
−− The 'Ramp time (decreasing)' must be
greater than the corresponding value for'Min. transit time OPEN' (Code 40) determined during initialization.
−− The 'Sampling time' must not be lower
than the indicated 'Recommended min.
sampling time'. The 'Recommended min.
sampling time' is calculated from the 'Expected duration of test'.

12.1 Start triggered by on/offvalve
The partial stroke test of on/off valves is triggered when the set point w moves away fromthe operating point into the range between
25 and 50 % of the travel range and remains
there for longer than six seconds. See u Section 5 and chart u page 72.
The PST diagnostic parameter 'Lower range
value' must be within the defined position± 'Tolerance limit' for the partial stroke test
to start.
The test and its cancelation are described in
section 12, while the test assessment is described in u Section 12.3.

12.2 Start triggered by thebinary input
If the positioner is fitted with the optional binary input, the partial stroke test can be started by the binary input when the conditions tostart the partial stroke test are met:−− A control valve is in the manual mode.
−− An on/off valve is in the manual or automatic mode. In automatic mode, the testis only started when the 'Safety set point'
is greater than the 'Fail-safe action limit'(Code 49 - h2).
The test and its cancelation are described in
section 12, while the test assessment is described in u Section 12.3.
It is important to make sure that the diagnostic parameter 'Lower range value' of theEB 8389-1 EN79

Partial stroke test (PST)

partial stroke test is within the range of the'Safety set point' ± 'Tolerance limit'.
Defining parameters
1. Select 'Binary input' in 'Positioner accessories identification'.
2. Configure the binary input.
3. Select classification for status message.
Device settings > Positioner > Options

Test completed successfully
When a partial stroke test has been completed
successfully, the analyzed parameters are displayed separately for the increasing and decreasing characteristics.
Analysis of measured data (step responsetest):−− 'Overshooting' (relative to the stepheight) [%]1. −−Positioner accessories identification: Binary
input−− 'Dead time' [s]Device settings > Positioner > Options >Configuration, binary input−− 'Settling time' [s]2. −−Binary input configuration: [For floating
contact (switch function)], For non-floating
contact (0-24 V)−−Select function: Start PST−−Binary input control: Activate function:
switch open, [Activate function: switch
closed]−−Safety set point: 0.0 to 100.0 %, [50.0 %]3. −−Binary input classification:[ ], , ,Note
Further details on optional binary input
u Section 15.

12.3 Analysis and monitoring
The analysis of the last three partial stroke
tests are saved with a time stamp in the PST
measured data assessment folder. A graph ofthe last partial stroke test is shown in the Partial stroke test (PST) folder.

80−− 'T86' [s]Analysis of measured data (ramp test):−− 'Overshooting' (relative to the stepheight) [%]The results of the first partial stroke test areused as the reference measurement.
Note
Changes in the diagnostic parameters listed
below affect the test. The results of the next
following partial stroke test is used as the newreference measurement:−−'Lower range value'−−'Stop'−−'Activate ramp function'−−'Ramp time (increasing)'−−'Ramp time (decreasing)'−−'Waiting time after step change'−−Test not completed
If the test was not completed, the reason forcancelation is indicated in the corresponding
reading by the 'Failure' message. The posi-

EB 8389-1 EN

Partial stroke test (PST)

tioner generates a 'PST/FST' message with theselected status classification.
Diagnostics > Monitoring−−PST/FST status (Code 84):

,

,

,

Note
The ‘No test available’ status remains active
until a partial stroke is completed successfully.

12.4 Resetting single status messages
The diagnostic parameters and measured data analysis of the partial stroke test are resetby selecting and executing the command “Reset ‘PST parameters”.
The positioner saves the measured data analysis of the last three partial stroke tests. The
analysis of the penultimate test is deleted
when another test is performed.
Diagnostics > Service/maintenance > Reset−−Reset 'PST parameters'

EB 8389-1 EN

81

Partial
Full stroke
stroketest
test(FST)(PST)

Prerequisite– Operating mode: Manualâ
Tolerance limit, Settling time before starting test,
Waiting time after step change, Sampling time
Activate ramp functionââSTART-UP

x [%]

No

100

â

x [%]

Yes

1)

100

â
0

Ramp time (increasing)
Ramp time (decreasing)

t [s]

0

t [s]

â
Cancelation condition
Max. test duration

Max. breakaway time

Perm. time until
CLOSED position

Status classification

Manual mode (TEST)

PST/FST
Solenoid valve
triggered/forced
venting active;
Control loop
error; Set point
start difference
too high; Current
too low; Supply
pressure too low

The valve has not
moved before reaching the max. breakaway time.

The valve
has not
reachedthe 'Stop'
position
before'Perm.
time until
CLOSED
position' haselapsed.

âââMax. test duration
exceededâStart FSTâ

â

Analysis (NE 107)/logged by operating hours counter
PST/FSTâ
Reset 'FST parameters'

82

1)

Recommended

EB 8389-1 ENFull stroke test (FST)

13 Full stroke test (FST)The dynamic valve performance can be evaluated by performing this test.
The full stroke test is started in the manualmode.
The following listed parameters are activatedwhile the full stroke test is being performed:−− Characteristic selection (Code 20): Linear−− Required transit time OPEN (Code 21):
Variable−− Required transit time CLOSED (Code 22):
Variable
During the full stroke test, the valve moves
through its entire working range.
The first step ends in the fail-safe position. As
a result, the second step starts from the failsafe position.

The change in travel can be performed either
in steps or in a ramp function (Fig. 20). For
the test in a ramp function, additionally thetimes for the increasing and decreasing ramps
need to be defined.
After being activated, the test does not start
until the 'Settling time before starting test'
has elapsed. This ensures that the valve hasreached the start position.
Starting from the start position, the valve
moves to the fail-safe position. The valve remains in this position for the time defined by
the 'Waiting time after step change' before
performing a second step change in the opposite direction from the fail-safe position to
the start position of the first step. After the'Waiting time after step change' has elapsed,the valve moves back to its operating point.

Fig. 19: Diagnostics > Monitoring/tests > Dynamic tests > Full stroke test (FST)EB 8389-1 EN83

Full stroke test (FST)The 'Tolerance limit' parameter defines thepermitted valve positions for the start value
and the end value for the step.

−− 'Max. test duration': The test is canceledwhen the maximum permissible test duration is reached.

The 'Sampling time' defines the time interval
between which the measured values are recorded during the test.

−− 'Max. breakaway time': The test is canceled when the time entered in 'Settling
time before starting test' has elapsed andthe valve has still not changed its position.
This cancelation condition only becomes
effective after it has been activated ("Activate 'Max. breakaway time" = [Yes]).

Test cancelation conditions
Various cancelation conditions provide additional protection against the valve slamming
shut or moving past the end position. The positioner cancels the full stroke test when oneof the following cancelation conditions is fulfilled:
x [%]
100
Operating point + Tolerance limit
Operating point
Operating point – Tolerance limitt [s]Settling time before
starting test

Settling time before
starting test

Waiting time after
step change∆tdecreasing

Waiting time after
step change

Waiting time after
step change∆tincreasing

Waiting time after
step change∆tdecreasing∆tincreasing‘Lower range value’ – ‘Stop’100‘Step start’ – ‘Step end’100x

‘Ramp time (decreasing)’x‘Ramp time (increasing)’

Fig. 20: Course of the full stroke test with step response (left) and ramp function (right), fail-close84

EB 8389-1 ENFull stroke test (FST)−− 'Perm. time until CLOSED position': The
test is canceled when the valve does notreach the CLOSED position before the adjusted time has elapsed. This cancelation
condition only becomes effective after it
has been activated ("Activate 'Perm. time
until step end" = [Yes]).
Additionally, the full stroke test is canceledwhen one of the following events arises:−− Cancel internal solenoid valve/forced
venting: The test was canceled by the activation of the solenoid valve/forced venting function.
−− Canceled by control loop error: A control
loop error has occurred.
−− Set point start difference too high: During
the step change, 'Lower range value' isoutside the range (operating point ± 'Tolerance limit').
−− Current too low−− Supply pressure too low
Note
The 'Measured data storage out of memory' reading (Failure) is generated when the'Sampling time' is too low. After recording
100 measured values per variable, logging is
stopped, but the test continues until it is completed.
After the full stroke test is canceled, the 'FST
status' reading indicates 'Not successful'. The
reason for cancelation is marked by the 'Failure' message in the Measured data assessment folder (> Current test).

EB 8389-1 EN

Defining parameters
1. Switch to manual mode (Code 0 = MAN).
2. Define parameters for full stroke test. See
also u Note concerning setting the FST diagnostic parameters.
3. Define parameters for cancelation conditions.
4. Select classification for status messages.
5. Start full stroke test.
The 'Test information' status indicates 'Test
active'. 'D6' and 'TEST' are indicated inalternating sequence on the positioner display. 'Function check'is activated as
the condensed state.
Diagnostics > Service/maintenance >Operating mode−−Enter operating mode (Code 0): Manual
Diagnostics > Monitoring/tests > Dynamic
tests > Full stroke test (FST)
2. −−Tolerance limit: 0.1 to 10.0 %, [2.0 %]−−Activate ramp function: [Yes], No−−Settling time before starting test:[1] to 240 s−−Waiting time after step change:
0.1 to 25.0 s−−Sampling time: 0.2 to 250.0 s, [1.4 s]
Only when the ramp function is activated:−−Ramp time (increasing): 0 to 9999 s, [60 s]−−Ramp time (decreasing): 0 to 9999 s, [60 s]
3. −−Max. test duration: 30 to 25000 s, [150 s]−−Activate 'Max. breakaway time': Yes, [No]−− Max. breakaway time: 0.0 to 25000 s,[70.0 s]85

Full stroke test (FST)−−Activate 'Perm. time until CLOSED position
exceeded': Yes, [No]−−Perm. time until CLOSED position exceeded:
0.0 to 25000 s, [30.0 s]
Device settings > Alarm settings > Statusclassification > PST/FST−−Max. test duration exceeded:[ ], , ,−−Test canceled manually: [

],

,

,

−− The 'Ramp time (decreasing)' must be
greater than the corresponding value for'Min. transit time OPEN' (Code 40) determined during initialization.
−− The 'Sampling time' must not be lower
than the indicated 'Recommended min.
sampling time'. The 'Recommended min.
sampling time' is calculated from the 'Expected duration of test'.

−−Measured data memory full:[ ], , ,−−Cancel internal solenoid valve/forced
venting: [ ], , ,−−Canceled by control loop error:[ ], , ,−−Set point start difference too high:[ ], , ,−−Set point change: [],−−Current too low: [

],

,
,

,
,

−−Max. breakaway time exceeded:[ ], , ,−−Perm. time until CLOSED position exceeded:[ ], , ,−−Canceled by supply pressure:[ ], , ,Diagnostics > Monitoring/tests > Dynamic
tests > Full stroke test (FST)
4. Start test

Note concerning setting the FST diagnostic
parameters−− The 'Ramp time (increasing)' must be
greater than the corresponding value for'Min. transit time CLOSED' (Code 41) determined during initialization.

86

EB 8389-1 ENFull stroke test (FST)13.1 Analysis and monitoring
The analysis of the last three full stroke tests
are saved with a time stamp in the FST measured data assessment folder.
Test completed successfully
When a full stroke test has been completed
successfully, the analyzed parameters are displayed separately for the increasing and decreasing characteristics.
Analysis of measured data (step responsetest):−− 'Overshooting' (relative to the stepheight) [%]−− 'Dead time' [s]−− 'T86' [s]−− 'Settling time' [s]Analysis of measured data (ramp test):−− 'Overshooting' (relative to the stepheight) [%]The results of the first full stroke test are usedas the reference measurement.
Note
Changes in the diagnostic parameters listed
below affect the test. The results of the next following full stroke test is used as the new reference measurement:−−'Activate ramp function'−−'Ramp time (increasing)'−−'Ramp time (decreasing)'−−'Waiting time after step change'

EB 8389-1 EN

Test not completed
If the test was not completed, the reason forcancelation is indicated in the corresponding
reading by the 'Failure' message. The positioner generates a 'PST/FST' message with theselected status classification.
Diagnostics > Monitoring−−PST/FST status (Code 84):

,

,

,

Note
The 'No test available' status remains active
until a full stroke is completed successfully.

13.2 Resetting single status messages
The diagnostic parameters of the full stroke
test are reset by selecting and executing thecommand 'Reset FST parameters'. The measured data analysis and the 'PST/FST status'
message cannot be reset.
The positioner saves the measured data analysis of the last three full stroke tests. The analysis of the penultimate test is deleted when another test is performed.
Diagnostics > Service/maintenance > Reset−−Reset 'FST parameters'

87

SIL operator test

14 SIL operator test
The SIL operator ensures that the safety function of the positioner is working. The safetyfunction is based on the shutdown of the i/p
converter (6, Fig. 22). This causes the pneumatic actuator to be vented and the valve to
move to its fail-safe position.
Monitoring of the input signal

A3

A2

The i/p converter is switched off when the input signal of the positioner at terminals +11/
–12 +81
falls below
3.8 mA
4.4 mA-82+11-12 or +83-84 depending+51 -52on the positioner version (a signal range of 4
to 20 mA is required). See Fig. 21.

Monitoring the voltage supply(version with forced venting and solenoid
valve)The i/p converter and the solenoid valve(when installed) are shut down wheneverthe voltage at terminals +81/–82 falls below 12 V (an input voltage of 24 V DC is required). See Fig. 21.
A1
GG
The SIL
operator
test checks
the emergency
shutdown by the integrated safety function(SIL). It can be started in the manual or automaticof control
valves.
+41-42mode
+31
-32
+31
-32
+31 -32

The positioner generates a permanent message in the Aevent that an error occurs during
the operator test. All control properties of thepositioner remain kept. Only the emergency
shutdown function of the positioner is no longer guaranteed.

Optional

A3

+81

-82

+11 -12

+83

-84

A2

A1

+51 -52+41 -42

Optional

Optional

OptionalGG+31 -32+31 -32+31 -32

LeakagesensorBinary input

A

24 V DC
Forcedventing/solenoid valve(optional)mA
controlsignalSwitching amplifier according to
EN 60947-5-6
A3 Fault
alarm
outputLimit switches
A2
Software

A1
Softwareoptionallyinductive

Two-wiretransmitter
Supply unit
only foroptionaltransmitter

Fig. 21: Electrical connections

88

EB 8389-1 ENSIL
SILoperator
operatortest
test

22
Serial20
Interface

16

21 FSK

13

%

mm

mm

S

4

w

BE

A3

%

15

5

19

A2

14

x1)

A1

14
&

>12 V

w

24 V DC
17

x

18

12

PD

G

25
6

G

9

8
23

11

2

3

10
7

Q

24
y

1
x

1 Control valve

14 Software limit switches A1/A2

2 Travel sensor

15 Fault indication output A33 PD controller

16 LCD

4 A/D converter

17* Actuation of solenoid valve

5 Microcontroller

18* Electrical insulation

6 i/p converter

19 D/A converter

7 Air capacity booster

20 Communication interface

8 Pressure regulator

21 HART® connection

9 Flow regulator

22 Binary input BE*

10 Volume restriction

23 Pressure sensor for supply air ps

11* Inductive limit switch
12* Solenoid valve
13* Analog position transmitter or
binary input

24 Pressure sensor for signal pressure pout

25* Forced venting* OptionsFig. 22: Functional diagram

EB 8389-1 EN

89

SIL operator test

! NOTICEThe SIL operator test causes the valve to automatically move. It must only be started when
the plant allows it.
Defining parameters
1. Set Type of application to Control valve.

The emergency shutdown function of the positioner is no longer guaranteed. The positioner needs to be returned immediately to
SAMSON.
Diagnostics > Service/maintenance > SIL
operator test−−SIL test:,

2. Apply an external set point:
4.0 to 4.5 mA for 3.8 mA emergency
shutdown
4.8 to 5.5 mA for 4.4 mA emergency
shutdown
3. Start SIL operator test.
S001 to S030 appear on the positioner
display one after the other.
Start-up
1. −−Type of application (Code 49 - h0): Control
valve
Diagnostics > Service/maintenance > SIL
operator test
3. −−Start SIL operator test

14.1 Analysis and monitoring
SIL operator test completed successfully
OK appears on the positioner display.
SIL operator test not completed
Possible error code E001 to E030 appears on
the positioner display. The positioner generates the permanent error code 86 (Failure this status classification cannot be changed).

90

EB 8389-1 EN

Binary input

15 Binary input
Type 3730-6xxxxx3x00x0x00
The positioner has an optional binary input toactivate various functions:−− [Transmit switching state]
The switching state of the binary input islogged.
−− Activate local write protection
After the first initialization, a local write
protection can be activated. While the binary input is active, no settings can bechanged at the positioner. The positioner
cannot be restarted. Enabling configuration over Code 3 is not active.
−− Start PST
The positioner starts a single partial stroke
test. The test is performed using the settings in Code 49 - d2 to Code 49 - d9.
See u Section 12.
−− Move valve to safety set point
An on/off valve moves to the predetermined safety set point when the positioner
is in automatic mode. This function is not
performed if the positioner is in the manual mode or fail-safe position mode.
−− Switch AUTO/MAN
The positioner changes from the automatic mode to the manual mode or vice versa. This function is not performed if thepositioner is in the fail-safe position mode.

EB 8389-1 EN−− Start data logger
Activation of the binary input causes thedata logger to start. See u Section 3.
−− Reset diagnostics
Active monitoring and dynamic tests are
stopped and the diagnostic data is reset
once.
Note
The optional binary input can only be configured using the TROVIS-VIEW 4 software andusing the DD parameters. In the default setting, the switch state is logged with a closed
switch.
Defining parameters
Note−−The parameters can only be defined in
TROVIS-VIEW 4 after the 'Positioner
accessories identification' has been set to'Binary input'.
−−The 'Safety set point' can only be set whenthe 'Type of application' is set to 'On/off
valve'.
1. Select 'Binary input' in 'Positioner accessories identification'.
2. Configure the binary input.
Device settings > Positioner > Options
1. −−Positioner accessories identification: Binary
input

91

Binary input

Device settings > Positioner > Options >Configuration, binary input
2. −−Binary input configuration: [For floating
contact (switch function)], For non-floating
contact (0-24 V)−−Select function: [Transmit switching state],
Activate local write protection, Start PST,
Move valve to safety set point, Switch
AUTO/MAN, Start data logger, Resetdiagnostics−−Binary input control: Activate function:
switch open, [Activate function: switch
closed]−−Safety set point: 0.0 to 100.0 %, [50.0 %](only when Type of application = On/off
valve)−−Binary input classification: [

92

],

,

,

EB 8389-1 ENDynamic HART® variables

16 Dynamic HART® variables
The HART® specification defines four dynamic variables consisting of a value and an engineering unit. These variables can be assigned
to device parameters as required. The universal HART® command 3 reads the dynamic
variables out of the device. This allows manufacturer-specific parameters to also be transferred using a universal command.
In the Type 3730-6 Positioner, the dynamic
variables can be assigned in the Device settings folder (> Positioner > HART communication) as listed in u Table 4:
Device settings > Positioner > HART
communication−−Primary variable assignment: [Set point],
Direction of action set point, Set point after
transit time specification, Valve position, Set
point deviation e, Absolute total valve travel,
Binary input status, Internal solenoid valve/
forced venting status, Condensed state,
Temperature, Leakage sensor sound level,
Ambient pressure, Signal pressure p out, Supply
pressure, Flow rate, Differential pressure, All
active errors−−Tertiary variable assignment: Set point,
Direction of action set point, Set point after
transit time specification, Valve position,[Set point deviation e], Absolute total valve
travel, Binary input status, Internal solenoid
valve/forced venting status, Condensed state,
Temperature, Leakage sensor sound level,
Ambient pressure, Signal pressure p out, Supply
pressure, Flow rate, Differential pressure, All
active errors−−Quaternary variable assignment: Set point,
Direction of action set point, Set point after
transit time specification, Valve position,
Set point deviation e, [Absolute total valve
travel], Binary input status, Internal solenoid
valve/forced venting status, Condensed state,
Temperature, Leakage sensor sound level,
Ambient pressure, Signal pressure p out, Supply
pressure, Flow rate, Differential pressure, All
active errors−−Secondary variable assignment: Set point,
Direction of action set point, Set point after
transit time specification, [Valve position],Set point deviation e, Absolute total valve
travel, Binary input status, Internal solenoid
valve/forced venting status, Condensed state,
Temperature, Leakage sensor sound level,
Ambient pressure, Signal pressure p out, Supply
pressure, Flow rate, Differential pressure, All
active errors

EB 8389-1 EN93

Dynamic HART® variables

Table 4: Dynamic HART® variables assignment
Variable

Meaning

Unit

Set point

Set point%

Direction of action set point

Direction of action set point%

Set point after transit time
specification

Set point after transit time specification%

Valve position

Valve position%

Set point deviation e

Set point deviation e%

Absolute total valve travel

Absolute total valve travel–

Binary input status

0 = Not active
1 = Active
255 = –/––

Internal solenoid valve/forced
venting status

0 = De-energized
1 = Energized
2 = Not installed–

Condensed state

0 = No message
1 = Maintenance required
2 = Maintenance request
3 = Failure
4 = Out of specification
7 = Function check–

Temperature

Temperature°C

Leakage sensor sound level

Leakage sensor sound leveldB

Ambient pressure

Ambient pressurembar

Signal pressure p out

Signal pressure poutbarSupply pressure

Supply pressurebarFlow rate

Flow rat

m³/h

Differential pressure

Differential pressurebar

All active errors

0 = No errors
1 = Control loop
2 = Zero
4 = w too low
8 = PST/FST status
16 = On/off error activated
32 = SIL test
64 = Set point outside range
128 = Total valve travel exceeded
256 = Operating mode not AUTO–

94

EB 8389-1 EN

Appendix

17 Appendix
17.1 Code list
Code Parameter – Readings/
no. values [default setting]Description

Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration.
48* Diagnostic parametersd0

Temperature
Read onlyd1Min. temperature
Read onlyd2

Max. temperature
Read onlyd3

No. of zero calibrations

Current operating temperature [°C] inside the positioner (accuracy ±3 %)Lowest temperature [°C] recorded inside the positioner since starting the operating hours counter
Highest temperature [°C] recorded inside the positioner since starting the operating hours counter
The number of zero calibrations performed since last initialization

Read onlyd4

No. of initializations
Read only

d5* Zero limit

Number of initializations performed since last start with default
valuesValve position limit relating to nominal range

0.0 to 100.0 %,'Zero point' message (Code 58) triggered depending on selected[5.0 %] of the nominal status classification if limit is exceeded.
range, ESC
Note: The 'Zero point' message (Code 58) has the default statusclassification 'Maintenance required'. This classification can only
be changed in the operator software (e.g. TROVIS-VIEW).
d6

Condensed state
Read only

EB 8389-1 EN

Summary of all status messages classified according to NAMUR
Recommendation NE 107
OK: No message
C: Maintenance required
CR: Maintenance demanded
S: Out of specification
B: Failure
I:
Function check95

Appendix

Code Parameter – Readings/
no. values [default setting]Description

Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration.
48* d7

Supply pressure ps

Current supply pressure [bar]Read onlyd8

Signal pressure pout

Current signal pressure [bar]Read onlyd9

Flow rate

Current valve flow rate

Read onlyNote– – – – appears on the display when the flow rate calculation is not
active or has failed.
d10 Differential pressure

Current differential pressure [bar]Read only
d11* Direction of action (ac- Indicates the actuator's direction of action
tuator)
SA: Single-acting
DA: Double-acting[-/-], SA, DA, ELSE,
ELSE: Other
ESC
Diagnostic parameters h
h0* Initialization including Initialization with [YES] or without [No] plotting the valve signature
valve signature
The valve signature involves the signal pressure p being plotted
No, [YES], ESC

in relation to the valve position.

out

Regardless of the adjusted settings, the valve signature is recorded
automatically when initializing a positioner that has not yet been
initialized (e.g. after initialization was reset (Code 36 - Std andCode 36 - DS)), after each further initialization if the settings for'Initialization mode', 'Pin position', 'Direction of action', 'Pressure
limit', 'Proportional-action coefficient Kp level' or 'Derivative-action
time Tv level' were changed, and when the switch position (ATO/
ATC) was changed.

Note
The valve signature is required to perform diagnostic functions.

96

EB 8389-1 EN

Appendix

Code Parameter – Readings/
no. values [default setting]Description

Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration.
h1, h2

Unassigned

48* h3* Desired time until 'Re- Time interval for scheduled resetting of measured diagnostic data
set measured diagnostic data'[0] to 365 days, ESC
h4

Remaining time until Remaining time (time and unit of time displayed in alternating se'Reset measured diag- quence) until the next scheduled reset of the diagnosis data
nostic data'
Read only

49* Partial stroke test (PST)
A

Partial stroke test (PST)A0* Start test
[No], YES, ESC

Starts partial stroke test (test D4).
The valve moves through the test range (Lower range value(Code 49 - d2) to Upper range value (Code 49 - d3)) and backagain in a ramp or in steps.
Recorded variables: time, set point, valve position, set point deviation, control signal.

A1

Time until next test
Read only

A2* Test start
AUTO, [MAN], ESC

Remaining time (time and unit of time displayed in alternating sequence) until the the next time-controlled test starts
Activates (AUTO) or deactivates (MAN) the time-controlled partial stroke test.

The write protection is
active in the AUTO setting (local operationand operation oversoftware locked).
A3* Test intervalTime interval (time and unit of time displayed in alternating sequence) between time-controlled tests

A4

Unassigned

A5

Recommended min.
sampling time
Read only

Sampling time [s] used to record entire step response in the graphof the partial stroke test

Appendix

Code Parameter – Readings/
no. values [default setting]Description

Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration.
49* A6
A7

Unassigned
Δp_out reference val- The valve moves to the lower range value (Code 49 - d2) and upper range value (Code 49 - d3) with a certain signal pressure.
ue
These signal pressures are used to form the Δp_out reference valRead onlyue [bar].

Note
The reference value only applies to the adjusted step and ramp
values.
A8* Activate Δp_out mon- Activates Δp_out monitoring (YES) or deactivates it (No)itoring[NO], YES, ESC
A9* Δp_out monitoringvalue
0.00 to 7.00 bar,
[1.00 bar,] ESC
dTest canceled if signal pressure change exceeds or falls below thereference value. The reference value is made up of Δp_out reference value Δp_out reference value (Code 49 - A7) and the Δp_out
monitoring value.

Step parameters for the partial stroke test (PST)

d0, d1

Unassigned

d2* Lower range value

Start value of the test range

0.0 to [100.0] %, ESC

Note
To perform a partial stroke test, the 'Lower range value' must be near
the current operating point ± 'Tolerance limit'.
The Tolerance limit is 2.0 % by default. It can be changed in the operator software, e.g. TROVIS-VIEW.
d3* Upper range value
0.0 to 100.0 %,[90.0 %], ESC

98

End value of the test range

EB 8389-1 EN

Appendix

Code Parameter – Readings/
no. values [default setting]Description

Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration.
d4* Activation of rampfunctionNo, [YES]
d5* Ramp time (decreasing)
0 to 9999 s, (600 s],
ESC

YES:
No:

The valve is moved through the test range within the adjusted ramp time.
The valve is moved in steps through the test range (stepresponse).

The time required by the valve to move through the range from
CLOSED to OPEN position.
The time to move from Lower range value (Code 49 - d2) to Upper
range value (Code 49 - d3) is calculated:|Upper range value – Lower range value| / 100 x Ramp time (increasing)

49* d6* Ramp time (increasing)
0 to 9999 s, [60 s],
ESC

The time required by the valve to move through the range from
OPEN to CLOSED position.
The time to move from Upper range value (Code 49 - d3) to Lower
range value (Code 49 - d2) is calculated:|Lower range value – Upper range value| / 100 x Ramp time(decreasing)d7* Settling time before
starting test
1 to 240 s, [1 s], ESC

Settling time between reaching the upper range value (Code 49 d3) and the valve moving through the test range in the reverse direction

d8* Waiting time after
step change

Waiting time between step change from Lower range value(Code 49 - d2) to Upper range value (Code 49 - d3) and vice ver1.0 to 240.0 s, [2.0 s], sa
ESC

d9* Sampling time

Interval for measured data recording

0.2 to 250.0 s, [0.8 s],
ESC
E

Cancelation conditions of the partial stroke test (PST)E0* Activate x monitoring Activates x monitoring (YES) or deactivates it (No)No, [YES]

EB 8389-1 EN99

Appendix

Code Parameter – Readings/
no. values [default setting]Description

Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration.
E1* x monitoring value–10.0 to 110.0 %,[85.0 %] of total travel, ESC
E2, E3, E4

The test is canceled when the valve position– falls below the adjusted value (step end < step start)– exceeds the adjusted value (step end > step start)
Unassigned

E5* Activate PST tolerance Activates PST tolerance band monitoring (YES) or deactivates itband monitoring(No)[No], YES
E6* PST tolerance band
0.1 to 100.0 %,[5.0 %], ESC
49* E7* Max. test duration

The test is canceled when the valve position's deviation (relating tostep end) exceeds the adjusted value.

Test canceled when max. test duration is reached.

30 to 25000 s, [90 s],
ESC
E8

Unassigned

E9* Reset 'PST parameters' Resets partial stroke test parameters.
F

Partial stroke test (PST) information · Read only

F0

No test available

F1
F2

Unassigned
x cancelation

The test was canceled.
The valve position fell below the x monitoring value (Code 49 E1).

F3

Δp_out cancelation

The test was canceled.
The signal pressure change Δp_out exceeded or fell below the reference value.

F4

100

Tolerance band exceeded

The valve position deviation exceeds the PST tolerance band
(Code 49 - E6).

EB 8389-1 EN

Appendix

Code Parameter – Readings/
no. values [default setting]Description

Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration.
F5

Max. test duration ex- The test was canceled.
ceededThe Max. test duration (Code 49 - E7) was reached.

F6

Test canceled manually

F7

Measured data mem- The Sampling time (Code 49 - d9) is too low. After recording 100
ory fullmeasured values per variable, logging is stopped, but the test continues until it is completed.

F8

Cancel internal solenoid valve/forced
venting

The test was canceled.

Canceled by control
loop error

The test was canceled.

F9
49* h
h0

The internal solenoid valve has been energized/the forced venting
has been activated.
A control loop error has occurred.

Type of application · Note: Section 7.8 contains details on the on/off valve.
Type of application

No

Control valve[No], YES, ESC

YES

On/off valve

Depending on the adjusted type of application, the positioner responds differently in automatic mode and there are differences inthe diagnostic functions. See section 3.4.
h1

Operating point

Valve position if set point w > Operating point limit (Code 49 - h5)

0.0 to [100.0] % valve
position, ESC
h2

Fail-safe action limit

Limit of the set point w

0.0 to 20.0 % [12.5 %] A limit violation causes the valve to move to the fail-safe position.
of the set point, ESC
h3

Lower limit to start test If the set point is between Lower limit to start test (25 %) and Failsafe action limit (Code 49 - h2), the valve remains in its last val[25.0 % of the set
id position.
point]

If the set point remains between Lower limit to start test (25 %)and Upper limit to start test (50 %) for six seconds, a partial stroke
starts. After the partial stroke test is completed, the valve moves
back to the last valid position.

EB 8389-1 EN

101

Appendix

Code Parameter – Readings/
no. values [default setting]Description

Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration.
h4

h5

102

Upper limit to starttest

If the set point is between Operating point limit and Upper limit tostart test (50 %), the valve remains in its last valid position.

[50.0 % of the set
point]

If the set point remains between Lower limit to start test (25 %)and Upper limit to start test (50 %) for six seconds, a partial stroke
starts. After the partial stroke test is completed, the valve moves
back to the last valid position.

Operating point limit

Limit of the set point w

55.0 to 100.0 %,[75.0 %] of the set
point, ESC

A limit violation causes the valve to move to the Operating point(Code 49 - h1).

EB 8389-1 EN

Appendix

17.2 Error messages and recommended corrective action
Message

Possible reasons

Recommended action

Statusclassification

Single reset•–

Diagnostics > Monitoring > Positioner
Control loop (Code 57)−− Actuator is blocked.

−− Check attachment.

−− Positioner attachment has shifted
subsequently.

−− Check supply pressure.

[]−− Insufficient supply pressure
Zero point (Code 58)−− Mounting arrangement or linkage has slipped.

−− Check valve and positioner attachment.

−− Valve trim, particularly with softseat, is worn.

−− Calibrate zero.

•

•

[

]

We recommend to re-initialize thepositioner if zero deviates by morethan 5 %.

Inconsistent data
memory (Code 59)

The error is detected by automatic monitoring and corrected automatically.

–•

Internal device error(Code 60)−− Electromagnetic interference–•

Kp too low (Code 61)

Proportional-action coefficient Kp
level lower than 3 was detected during initialization.

−− Activate volume restriction inpositioner output.

••−− Actuator's measured value recording failed.

−− Return positioner to SAMSON
for repair.

x signal (Code 62)−− Reset initialization.
−− Re-initialize positioner.

[

]
–

–

−− Conductive plastic element defective.
w too small (Code 63)−− The set point (w) is lower than
3.7 mA.
This state is indicated on the positioner display by LOW blinking.

−− Check set point (w). If necessary, restrict lower limit of current source to ensure that a current below 3.7 mA cannot be
issued.

–

•

[

]

Return positioner to SAMSON for
repair.

––Hardware (Code 65)

Confirm error and select 'Automatic' operating mode. If not successful, reset initialization and re-initialize the positioner.

–•

Control calculation(Code 67)

Confirm error. If this is not possible, return positioner to SAMSON
for repair.

–•

Return positioner to SAMSON for
repair.

––i/p converter (Code 64)

Pressure sensor(Code 72)

EB 8389-1 EN

Current circuit of i/p converter interrupted.

Pressure sensor(s) for supply air
and/or signal pressure defective

103

Appendix

Statusclassification

Single reset

–

–

–

SIL operator test failed

Return positioner to SAMSON for
repair.

––Set point outside range

Set point smaller than 4 mA or
greater than 20 mA.

If possible, limit current source
at lower (4 mA) and/or upper(20mA) limit.

––

Binary input status

Binary input is active––

Temperature status−− Temperature fallen below –40 °C•–

Message

Possible reasons

Recommended action

Collective error(Code 79)

Messages generated in EXPERTplus

SIL test (Code 86)−− Temperature exceeded +80 °C
x > range (Code 50)−− Pin not mounted properly.
−− NAMUR attachment: bracket slipped or follower pin notproperly seated on the follower
plate's slot.

[−− Check attachment and pin position.
−− Re-initialize positioner.

]
•

[

•

]

−− Follower plate not mounted
properly.
∆x < range (Code 51)−− Pin not mounted properly.
−− Wrong lever mounted.

Attachment (Code 52)−− Check attachment and pressure limit.

−− Pressure limit set too low.

−− Re-initialize positioner.

−− Wrong lever mounted.

−− Check attachment and supply
pressure.

−− Supply pressure too low; valve
cannot be moved to desired position.

−− Re-initialize positioner.

•

[

•

]
•

•

[

]

−− Nominal range could not bereached during nominal range
initialization (NOM).
Initialization timeexceeded (Code 53)

Timeout detected during initialization−− Valve takes too long to open.

−− Check supply pressure and install pneumatic volume booster,
if necessary.

•

•

[

]

−− Valve cannot find fixed end stops −− Adjust travel/angle stops.
(e.g. when lined control butterfly −− Reduce hunting tendency (e.g.
restrict or open booster bypass).
valves are used).
Then re-initialize the positioner.
−− Valve tends to hunt considerably.
Internal solenoid valve/
forced venting/supply
pressure (Code 54)

Internal solenoid valve/forced venting not or improperly connected.

−− Check connection and supply voltage of solenoid valve/
forced venting.

•

[

•

]

−− Re-initialize positioner.
An attempt was made to initialize
the device from fail-safe position.

104−− Switch to manual mode.
−− Re-initialize positioner.

EB 8389-1 EN

Appendix

Message

Possible reasons

Recommended action

Transit time not reached(Code 55)

Actuator transit times detectedduring initialization are so short(< 0.3 s) that optimal positioner tuning is impossible.

−− Activate volume restriction inpositioner output.

Pin/switch position(Code 56)

No emergency mode
(Code 76)−− Re-initialize positioner.

Pin position not entered for nominal −− Enter pin position and nominal range.
range (NOM) or substitute (SUB) initialization.
−− Re-initialize positioner.
ATO/ATC switch defective.

Return positioner to SAMSON for
repair.

Positioner detected during initialization that actuator permits no emergency control mode without feedback. In case of a travel sensing error, positioner vents Output or A1 indouble-acting actuators.

For your information only. No further action required.

Valve signature canceled Error while recording valve(Code 81)signature. Refer to section

Restart the valve signature recording or start initialization including
valve signature.

Statusclassification

Single reset

•

•

[

]
•

[

•

]

•

[

–

]

–

•

[

]

Diagnostics > Monitoring > Valve
Change in friction−− The friction is higher/lower intotal range−− Check the valve's packing.

−− The friction is higher/lower invalve's mid-position.

•

•

[

]

−− The friction is higher/lower nearvalve's max. OPEN position.
−− The friction is higher/lower nearvalve's CLOSED position.
Seat leakage−− Alarm limit 2 or 3 exceeded.

−− Check seat and plug.

•

[

•

]

−− Seat leakage may exist.

u Sec.
9.1.2.4•
u Sec. 7.2

Packing leakage

Total valve travel exceeded

EB 8389-1 EN−− Packing leakage is possibly to
be expected soon.
−− 'Absolute total valve travel' exceeded 'Total valve travel limit'.

−− Check the valve's packing.

•

•

[

]
•

[

u Sec. 8.2
–

]

105

Appendix

Message

Possible reasons

Recommended action

Statusclassification

Single reset•–

Diagnostics > Monitoring > Actuator
Pneumatic leakage−− A leak in the pneumatics exists.

−− Check that pneumatic installations and connections are tight.

Defective actuator
springs−− The actuator spring pre-loading
is reduced.

−− Check actuator springs.

Supply pressure status−− The supply pressure is outsidepermissible limits.

−− Check supply pressure.

[

]
•

•

[

]

u Sec. 4.5]

u Sec. 4.5

•

•

[

−− The supply pressure is too high.

•[−− The supply pressure fluctuates.

]•[−− The supply pressure is too low.

]•[−− No supply pressure is available.

]
•

[

]

Diagnostics > Monitoring > Valve position
Manipulated variable
range limitation−− The working range is limited at
upper or lower range value.

−− Check that pneumatic installations and connections are tight.

−− The valve is jammed.

−− Check supply pressure.

•

•

[

]

u Sec. 7.2]

u Sec. 10.2]

u Sec. 7.2]

u Sec. 6.2−− Check plug stem for external influences that could be blocking it.
Course of end position−− Course of end position monotonically increasing/decreasing.

−− Check seat and plug.

−− The course of end position
alternates.
Positioner-valve linkage−− No optimal travel transmission.

−− Check attachment.

−− The working range is limited.
Manipulated variable
range−− The working range is mainly
close to the CLOSED/max.
OPEN position.

•

[

•

•

[
−− Rethink the working range.

•

•

[

•

−− The working range is mainlyin the CLOSED/max. OPEN
position.

106

EB 8389-1 EN

Appendix

Message

Possible reasons

Recommended action

Change in manipulated
variable range−− The working range has shifted
towards CLOSED or max. OPEN
position.

−− Rethink the working range.

Statusclassification[

Single reset••]u Sec. 6.2−− Short-term change ofmanipulated variable range
occurred.
Diagnostics > Monitoring
PST/FST status Status(Code 84)−− The partial stroke test or thefull stroke test has not been
completed successfully.

−− Read test status. See
section 12/13.

On/off valve (Code 85)−− The breakaway time or transit
time differs from the reference
value by the amount entered in'Travel time assessment limit'.

−− Check valve and actuator.

–

•

[

]
•

•

[

]

u Sec. 5.3−− The valve end position differs from reference value by theamount entered in 'Valve end
position limit'.
−− The valve end position cannot
be reached.

EB 8389-1 EN

107

Appendix

17.3 Diagnostic data points saved in a non-volatile memory
Data saved in a non-volatile memory
Saved directly after they change
Monitoring

Saved cyclically every 24 h−−Status classification−−Alarm settings−−Logging

Data logger

Diagnostic parameters

Valve signature−−Diagnostic parameters

Measured values−−Manufacturer referenceLong-term monitoring−−Process referenceSound level(x)On/off valve

Reference assessment

Assessment

Valve position x histogram

Diagnostic parameters

Measured data in histogram

Set point deviation ehistogram

Diagnostic parameters

Measured data in histogram

Cycle counter histogram
Lower end position

Measured data in histogram
Measured values

Valve dead band
Partial stroke test (PST)−−Diagnostic parameters−−Test cancelation conditions−−Δp out reference value−−Course of step response−−Measured data assessment−−Number of tests

Full stroke test (FST)−−Diagnostic parameters−−Test cancelation conditions−−Δp out reference value−−Course of step response−−Measured data assessment−−Number of tests

108

EB 8389-1 EN

Appendix

17.4 Resetting parameters
Reset Code 36
Parameters

Diag

Std

DS

Type of application (Code 49 - h0)

YES

YES

YES

Reading direction (Code 2)

NO

YES

YES

Initialization mode (Code 6)

NO

YES

YES

Initialization including valve signature (Code 48 - h0)

NO

YES

YES

Pin position (Code 4)

NO

YES

YES

Enter nominal range

NO

YES

YES

Pressure limit (Code 16)

NO

YES

YES

Actuator motion

NO

NO

YES

Principle of operation (Code 48 - d11)

NO

NO

YES

Stem seal

NO

NO*

YES

Air supply failure

NO

NO

YES

Power supply failure of positioner

NO

NO

YES

Power supply failure of external solenoid valve

NO

NO

YES

Emergency mode

NO

NO

NO

Proportional-action coefficient Kp level (Code 17)

NO

NO

NO

Derivative-action time Tv level (Code 18)

NO

NO

NO

Initialization mode (Code 6)

NO

YES

YES

Activate upper limit for travel/angle (Code 11)

NO

YES

YES

Direction of action (Code 7)

NO

YES

YES

Proportional-action coefficient Kp level (Code 17)

NO

NO

NO

Derivative-action time Tv level (Code 18)

NO

NO

NO

Substitute calibration optimization

NO

YES

YES

Start-up* Max. cycle count is set to 1000000
Start-up > Fail-safe action

Start-up > Control parameters

Start-up > Substitute calibration

EB 8389-1 EN

109

Appendix

Reset Code 36
Parameters

Diag

Std

DS

YES

YES

YES

Start-up > Reference graphs > Valve signature
Sensitivity

Start-up > Reference graphs > Leakage sensor > Manufacturer reference
Settling time before sound level measurement

NO

NO

NO

Sensitivity sound level

NO

NO

YES

Set points

NO

NO

YES

Settling time before sound level measurement

NO

NO

NO

Sensitivity sound level

NO

NO

YES

Response time

NO

NO

YES

Preset alarm limits

NO

NO

YES

Alarm limits 1 to 3

NO

NO

YES

Set points

NO

NO

YES

Attachment

NO

NO

YES

Inductive limit switch (Code 38)

NO

NO

NO

Direction of action (Code 7)

NO

YES

YES

Lower set point range value (Code 12)

NO

YES

YES

Upper set point range value (Code 13)

NO

YES

YES

Activate CLOSED end position (Code 14)

NO

YES

YES

CLOSED end position (Code 14)

NO

YES

YES

Activate OPEN end position (Code 15)

NO

YES

YES

OPEN end position (Code 15)

NO

YES

YES

Enter transit time OPEN (Code 21)

NO

YES

YES

Enter transit time CLOSED (Code 22)

NO

YES

YES

Lower travel/angle range value

NO

YES

YES

Start-up > Reference graphs > Leakage sensor > Process reference

Device settings > Positioner

Device settings > Positioner > Transfer characteristic

110

EB 8389-1 EN

Appendix

Reset Code 36
Parameters

Diag

Std

DS

Upper travel/angle range value (Code 9)

NO

YES

YES

Activate lower travel/angle limit (Code 10)

NO

YES

YES

Lower travel/angle limit (Code 10)

NO

YES

YES

Activate upper limit for travel/angle (Code 11)

NO

YES

YES

Upper limit for travel/angle (Code 11)

NO

YES

YES

Select characteristic (Code 20)

NO

YES

YES

User-defined characteristic

NO

YES

YES

Device settings > Positioner > Transfer characteristic on/off
Activate CLOSED end position (Code 14)

NO

CLOSED end position (Code 14)

NO

Activate OPEN end position (Code 15)

NO

OPEN end position (Code 15)

NO

Enter transit time OPEN (Code 21)

NOEnter transit time CLOSED (Code 22)

NO

Operating point (Code 49 - h1)

NO

Fail-safe action limit (Code 49 - h2)

NO

Operating point limit (Code 49 - h5)

NO

The type of applicationis reset to 'Control
valve'.
The Transfer
characteristic on/off
folder is not displayed
after resetting.
Parameters of theTransfer characteristic
on/off folder are resetto their default settings.

Device settings > Positioner > HART communication
Bus address (Code 46)

NO

NO

YES

Enter no. of preambles

NO

NO

YES

Primary variable assignment

NO

NO

YES

Secondary variable assignment

NO

NO

YES

Tertiary variable assignment

NO

NO

YES

Quaternary variable assignment

NO

NO

YES

HART® write protection

NO

NO

YES

Valve manufacturer

NO

NO

YES

Actuator motion

NO

NO

YES

Device settings > Valve

EB 8389-1 EN

111

Appendix

Reset Code 36
Parameters

Diag

Std

DS

Valve design

NO

NO

YES

Type designation

NO

NO

YES

Valve serial no.

NO

NO

YES

Configuration ID (Var.-ID)

NO

NO

YES

Valve standard

NO

NO

YES

Nominal size DN

NO

NO

YES

Flow direction

NO

NO

YES

Stem seal

NO

NO

YES

Packing type

NO

NO

YES

Friction coefficient of packing

NO

NO

YES

Pressure balancing

NO

NO

YES

Facing (leakage class)

NO

NO

YES

Friction coefficient of facing

NO

NO

YES

Bellows seal

NO

NO

YES

Valve seat diameter

NO

NO

YES

Kvs

NO

NO

YES

Kvs unit

NO

NO

YES

Plug type

NO

NO

YES

Valve characteristic

NO

NO

YES

Noise reduction

NO

NO

YES

Device settings > Actuator

112

Actuator manufacturer

NO

NO

YES

Actuator motion

NO

NO

YES

Actuator type

NO

NO

YES

Type designation

NO

NO

YES

Principle of operation (Code 48 - d11)

NO

NO

YES

Configuration ID (Var.-ID)

NO

NO

YES

Actuator serial no.

NO

NO

YES

EB 8389-1 EN

Appendix

Reset Code 36
Parameters

Diag

Std

DS

Effective actuator area

NO

NO

YES

Lower signal pressure range value

NO

NO

YES

Upper signal pressure range value

NO

NO

YES

Actuator fail-safe action

NO

NO

YES

Min. process pressure

NO

NO

YES

Max. process pressure

NO

NO

YES

Supply pressure

NO

NO

YES

Supply medium

NO

NO

YES

Device settings > Further accessories
Filter regulator

NO

NO

YES

Reversing amplifier

NO

NO

YES

Booster

NO

NO

YES

Quick exhaust valve

NO

NO

YES

3/2-way valve

NO

NO

YES

Choke valve

NO

NO

YES

Lock-up valve

NO

NO

YES

Limit switch

NO

NO

YES

External solenoid valve

NO

NO

YES

State of process medium

NO

NO

YES

Constant pressure level at

NO

NO

YES

Input pressure p1

NO

NO

NO

Output pressure p2

NO

NO

NO

Inlet temperature

NO

NO

NO

Inlet density

NO

NO

NO

Isentropic exponent

NO

NO

YES

Device settings > Process data

EB 8389-1 EN

113

Appendix

Reset Code 36
Parameters

Diag

Std

DS

Device settings > Process data > Min. operating point
Input pressure p1

NO

NO

YES

Flow rate

NO

NO

YES

Output pressure p2

NO

NO

YES

Inlet temperature

NO

NO

YES

Inlet density

NO

NO

YES

Vapor pressure

NO

NO

YES

Critical pressure

NO

NO

YES

Isentropic exponent

NO

NO

YES

Compressibility factor

NO

NO

YES

Viscosity

NO

NO

YES

Flow coefficient

NO

NO

YES

Outlet velocity

NO

NO

YES

Relative travel/angle

NO

NO

YES

Differential pressure ratio

NO

NO

YES

Sound pressure level

NO

NO

YES

Input pressure p1

NO

NO

NO

Flow rate

NO

NO

YES

Output pressure p2

NO

NO

NO

Inlet temperature

NO

NO

NO

Inlet density

NO

NO

NO

Vapor pressure

NO

NO

YES

Critical pressure

NO

NO

YES

Isentropic exponent

NO

NO

YES

Compressibility factor

NO

NO

YES

Viscosity

NO

NO

YES

Flow coefficient

NO

NO

YES

Device settings > Process data > Normal operating point

114

EB 8389-1 EN

Appendix

Reset Code 36
Parameters

Diag

Std

DS

Outlet velocity

NO

NO

YES

Relative travel/angle

NO

NO

YES

Differential pressure ratio

NO

NO

YES

Sound pressure level

NO

NO

YES

Input pressure p1

NO

NO

YES

Flow rate

NO

NO

YES

Output pressure p2

NO

NO

YES

Inlet temperature

NO

NO

YES

Inlet density

NO

NO

YES

Vapor pressure

NO

NO

YES

Critical pressure

NO

NO

YES

Isentropic exponent

NO

NO

YES

Compressibility factor

NO

NO

YES

Viscosity

NO

NO

YES

Outlet velocity

NO

NO

YES

Flow coefficient

NO

NO

YES

Relative travel/angle

NO

NO

YES

Differential pressure ratio

NO

NO

YES

Sound pressure level

NO

NO

YES

Device settings > Process data > Max. operating point

Device settings > Alarm settings
Tolerance band (Code 19)

NO

YES

YES

Zero limit (Code 48 - d5)

NO

YES

YES

Lag time

NO

YES

YES

Leakage limit

NO

NO

YES

Travel time assessment limit (on/off valve)NO

Travel assessment limit (on/off valve)NO

EB 8389-1 EN

The type of applicationis reset to 'Control
valve'.

115

Appendix

Reset Code 36
Parameters

Diag

Std

DS

Total valve travel limit (Code 24)

NO

YES

YES

Stem seal

NO

NO

YES

Alarm mode (Code 25)

NO

YES

YES

Activate limit A1 and A2

NO

YES

YES

Limit A1 and A2 (Code 26 and 27)

NO

YES

YES

Error message in case of … (Code 32 and 33)

NO

YES

YES

Permit 'More status available' bit

NO

NO

YES

Condensed state … activates

NO

NO

NO

Recording threshold

YES

YES

YES

Activate lower limit

NO

YES

YES

Lower limit

NO

YES

YES

Activate upper limit

NO

YES

YES

Upper limit

NO

YES

YES

NO

NO

YES

NO

NO

YES

NO

NO

YES

NO

NO

YES

NO

NO

YES

Device settings > Alarm settings > Status classification > Positioner
All classifications
Device settings > Alarm settings > Status classification > ValveAll classifications
Device settings > Alarm settings > Status classification > Actuator
All classifications

Device settings > Alarm settings > Status classification > Valve position
All classifications
Device settings > Alarm settings > Status classification > PST/FST
All classifications

Device settings > Alarm settings > Status classification > On/off valve
All classifications

116

NO

The type of applicationis reset to 'Control
valve'.

EB 8389-1 EN

Appendix

Reset Code 36
Parameters

Diag

Std

DS

NO

NO

YES

Supply pressure

NO

NO

YES

Change in friction

NO

NO

YES

Seat leakage

NO

NO

YES

Packing leakage

NO

NO

YES

Pneumatic leakage

NO

NO

YES

Defective actuator springs

NO

NO

YES

Manipulated variable range limitation

NO

NO

YES

Course of end position

NO

NO

YES

Positioner-valve linkage

NO

NO

YES

Manipulated variable range

NO

NO

YES

Change in manipulated variable range

NO

NO

YES

Partial stroke test (PST)

NO

NO

YES

Full stroke test (FST)

NO

NO

YES

On/off valve

NO

NO

YES

Code 50–58, 61, 63, 76, 81

NO

NO

YES

Binary input

NO

NO

YES

Data logger

NO

NO

YES

Internal solenoid valve/forced venting

NO

YES

YES

Min. interval for new logging of internal solenoid valve

NO

YES

YES

Function

YES

YES

YES

Sampling time

YES

YES

YES

Triggered by

YES

YES

YES

Trigger value

YES

YES

YES

Trigger band

YES

YES

YES

Device settings > Alarm settings > Status classification > Supply pressure
All classifications
Device settings > Alarm settings > Status classification > Logging

Diagnostics > Data logger

EB 8389-1 EN

117

Appendix

Reset Code 36
Parameters

Diag

Std

DS

Trigger condition

YES

YES

YES

Trigger lead time

YES

YES

YES

YES

YES

Diagnostics > Monitoring/tests > Valve signature > Course of supply pressure
Recording threshold

NO

Diagnostics > Monitoring/tests > Histograms > Valve position x histogram > Short-term monitoring
Sampling time

YES

YES

YES

Diagnostics > Monitoring/tests > Histograms > Set point deviation e histogram > Short-term monitoring
Sampling time

YES

YES

YES

YES

NO

YES

Lower range value

YES

YES

YES

Stop

YES

YES

YES

Waiting time after step change

YES

YES

YES

No. until reversing

YES

YES

YES

Diagnostics > Monitoring/Tests > Leakage sensor > Short-term monitoring
Sensitivity sound level
Diagnostics > Monitoring/tests > Dynamic tests > Valve dead band

Diagnostics > Monitoring/tests > Dynamic tests > Partial stroke test (PST)

118

Enter test start (Code 49 - A2)

NO

NO

NO

Enter test interval (Code 49 - A3)

NO

YES

YES

Lower range value (Code 49 - d2)

NO

YES

YES

Stop (Code 49 - d3)

NO

YES

YES

Tolerance limit

NO

YES

YES

Activate ramp function (Code 49 - d4)

NO

YES

YES

Ramp time (decreasing) (Code 49 - d5)

NO

YES

YES

Ramp time (increasing) (Code 49 - d6)

NO

YES

YES

Settling time before starting test (Code 49 - d7)

NO

YES

YES

Waiting time after step change (Code 49 - d8)

NO

YES

YES

EB 8389-1 EN

Appendix

Reset Code 36
Parameters

Diag

Std

DS

Sampling time (Code 49 - d9)

YES

YES

YES

Max. test duration (Code 49 - E7)

YES

YES

YES

Activate 'Max. breakaway time'

NO

YES

YES

Max. breakaway time

NO

YES

YES

Activate 'Perm. time until step end'

NO

YES

YES

Perm. time until step end

NO

YES

YES

Activate x-monitoring (Code 49 - E0)

NO

YES

YES

x monitoring value (Code 49 - E1)

NO

YES

YES

Activate Δp out monitoring (Code 49 - A8)

NO

YES

YES

Δp out monitoring value (Code 49 - A9)

NO

YES

YES

Activate PST tolerance band monitoring (Code 49 - E5)

NO

YES

YES

PST tolerance band (Code 49 - E6)

NO

YES

YES

Diagnostics > Monitoring/tests > Dynamic tests > Full stroke test (FST)
Tolerance limit

NO

YES

YES

Activate ramp function

NO

YES

YES

Ramp time (increasing)

NO

YES

YES

Ramp time (decreasing)

NO

YES

YES

Settling time before starting test

NO

YES

YES

Waiting time after step change

NO

YES

YES

Sampling time

YES

YES

YES

Max. test duration

YES

YES

YES

Activate 'Max. breakaway time'

NO

YES

YES

Max. breakaway time

NO

YES

YES

Activate 'Perm. time until CLOSED position exceeded'

NO

YES

YES

Perm. time until CLOSED position

NO

YES

YES

EB 8389-1 EN

119

Appendix

Reset Code 36
Parameters

Diag

Std

DS

NO

NO

YES

Diagnostics > Service/maintenance > Reset
Desired time until 'Reset measured diagnostic data'(Code 48 - h3)

120

EB 8389-1 EN

Appendix

Abbreviations usede

Set point deviation

pout Signal pressure
ps Supply pressurex

Valve position

x0

Valve position when the valve istightly shutw

Set point, reference variable

EB 8389-1 EN

121

122

EB 8389-1 EN

EB 8389-1 EN123

SAMSON AKTIENGESELLSCHAFT
Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany
Phone: +49 69 4009-0 · Fax: +49 69 4009-1507
samson@samson.de · www.samson.de

2018-09-21 · English

EB 8389-1 EN