PROGRAMMABLE CONTROLLER

PC-900INSTRUCTION MANUALPreface

Thank you for purchasing our Programmable Controller PC-900.
This manual contains instructions for the mounting, functions, operations and notes when operating the PC-900.
To prevent accidents arising from the misuse of this controller, please ensure the operator receives this manual.
Abbreviations
SymbolTerm
PV
Process variable
SV
Desired value
MV
Manipulated variable
OUT1 Control output 1
OUT2 Control output 2
AT
Auto-tuningDC
DC current input
input
DC voltage input

Characters used in this manual
Indication
Number, /Indication
Alphabet
Indication
Alphabet

-1

0

A
N

O

1

2

3

4

5

6

7

8

9

B

C

D

E

F

G

H

I

J

K

L

P

Q

R

S

T

U

V

W

X

Y

Z

M

Notes

• This instrument should be used in accordance with the specifications described in the manual.
If it is not used according to the specifications, it may malfunction or cause a fire.
• Be sure to follow the warnings, cautions and notices. If they are not observed, serious injury or malfunction
may occur.
• Specifications, external appearance of the PC-900 and the contents of this instruction manual are subject
to change without notice.
• Care has been taken to ensure that the contents of this instruction manual are correct, but if there are any
doubts, mistakes or questions, please inform our sales department.
• This instrument is designed to be installed within a control panel. If it is not, measures must be taken to
ensure that the operator cannot touch power terminals or other high voltage sections.
• Any unauthorized transfer or copying of this document, in part or in whole, is prohibited.
• Shinko Technos CO., LTD. is not liable for any damage or secondary damage(s) incurred as a result of using
this product, including any indirect damage.
Safety Precautions (Be sure to read these precautions before using our products.)
The safety precautions are classified into categories: “Warning” and “Caution”.
Depending on circumstances, procedures indicated by
Caution may be linked to serious results, so be
sure to follow the directions for usage.

Warning
CautionProcedures which may lead to dangerous conditions and cause death orserious injury, if not carried out properly.
Procedures which may lead to dangerous conditions and cause superficial tomedium injury or physical damage or may degrade or damage the product, if not
carried out properly.

Warning• To prevent an electric shock or fire, only Shinko or other qualified service personnel may handle the innerassembly.
• To prevent an electric shock, fire or damage to the instrument, parts replacement may only be undertaken
by Shinko or other qualified service personnel.

Safety Precautions• To ensure safe and correct use, thoroughly read and understand this manual before using this instrument.
• This instrument is intended to be used for industrial machinery, machine tools and measuring equipment. Verify
correct usage after consulting purpose of use with our agency or main office. (Never use this instrument for
medical purposes with which human lives are involved.)• External protection devices such as protective equipment against excessive temperature rise, etc. must be
installed, as malfunction of this product could result in serious damage to the system or injury to personnel.
Also proper periodic maintenance is required.
• This instrument must be used under the conditions and environment described in this manual. Shinko TechnosCo., Ltd. does not accept liability for any injury, loss of life or damage occurring due to the instrument being used
under conditions not otherwise stated in this manual.
2Caution with respect to Export Trade Control Ordinance
To avoid this instrument from being used as a component in, or as being utilized in the manufacture of weaponsof mass destruction (i.e. military applications, military equipment, etc.), please investigate the end users and thefinal use of this instrument. In the case of resale, ensure that this instrument is not illegally exported.

1. Installation precautions

CautionThis instrument is intended to be used under the following environmental conditions (IEC61010-1):
Overvoltage category , Pollution degree 2
Ensure the mounting location corresponds to the following conditions:• A minimum of dust, and an absence of corrosive gases• No flammable, explosive gases• No mechanical vibrations or shocks• No exposure to direct sunlight, an ambient temperature of 0 to 50 (32 to 122 ) that does not change
rapidly, and no icing• An ambient non-condensing humidity of 35 to 85%RH• No large capacity electromagnetic switches or cables through which large current is flowing.
• No water, oil or chemicals or where the vapors of these substances can come into direct contact with the unit
• Take note that the ambient temperature of this unit – not the ambient temperature of the control panel –must not exceed 50 (122 ) if mounted through the face of a control panel, otherwise the life of theelectronic components (especially electrolytic capacitors) of the unit will be shortened.
Note: Avoid setting this instrument directly on or near flammable material even though the case of this
instrument is made of flame-resistant resin.

2. Wiring precautions

Caution• Do not leave bits of wire inside the instrument, because they could cause a fire or malfunction.
• Use a solderless terminal with an insulation sleeve in which an M3 screw fits when wiring the PC-900.
• The terminal block of this instrument is designed to be wired from the left side.
The lead wire must be inserted from the left side of the terminal, and fastened with the terminal screw.
• Tighten the terminal screw within the specified torque.
If excessive force is applied to the screw when tightening, the screw or case may be damaged.
• Do not apply a commercial power source to the sensor connected to the input terminal nor allow thepower source to come into contact with the sensor, as the input circuit may be burnt out.
• This controller has no built-in power switch, circuit breaker or fuse. It is necessary to install a power switch,circuit breaker or fuse near the controller. (Recommended fuse: Time-lag fuse, rated voltage 250V AC,
rated current 2A)• For a 24V AC/DC power source, do not confuse polarity when using direct current (DC).

3. Running and maintenance precautions

Caution• It is recommended that AT (auto-tuning) be performed on the trial run.
• Do not touch live terminals. This may cause electric shock or problems in operation.
• Turn the power supply to the instrument OFF when retightening the terminal and cleaning. Working or
touching the terminal with the power switched ON may result in severe injury or death due to Electric Shock.
• Use a soft, dry cloth when cleaning the instrument.
(Alcohol based substances may tarnish or deface the unit.)• As the display section is vulnerable, do not strike or scratch it with a hard object or press hard on it.

Notice• Setup of the Rotary switch and the DIP switch inside the controller is required before the power isturned on. Default values of the product are:Sensor input: K, Control action: PID (with AT function), Heating control, Alarm (A1): Pattern end output,
Alarm (A3): High limit alarm output, Alarm (A4): Low limit alarm output, Unit: . Refer to “3. Setup”.
• It is recommended that the auto-tuning be performed on the trial run.
• Install protective devices against environmental conditions which may cause damage to the instrument
or the deterioration of its parts.
• In the case of the PC-955 model, set the Open and Closed output time according to the specificationof the control valve.
3

1. Model--

CONTENTS--

1.1 Explanation of the model ----------------------------------------------------------------------------- 5
1.2 How to read the model label ------------------------------------------------------------------------- 6
2. Name and functions ----------------------------------------------------------------------------- 7
3. Setup ----------------------------------------------------------------------------------------------------- 10

4. Mounting to the control panel

4.1 Site Selection ------------------------------------------------------------------------------------------ 14
4.2 External dimensions, Panel cutout --------------------------------------------------------------- 14
4.3 Mounting ------------------------------------------------------------------------------------------------ 14

5. Wiring

5.1 Terminal arrangement ------------------------------------------------------------------------------- 15
5.2 Wiring examples -------------------------------------------------------------------------------------- 18

6. Operations

6.1 Operation flowchart ---------------------------------------------------------------------------------- 20
6.2 Key operation when setting ------------------------------------------------------------------------ 22
6.3 Program pattern setting ----------------------------------------------------------------------------- 22
6.4 How to clear set values ----------------------------------------------------------------------------- 26
6.5 Block data Setting ------------------------------------------------------------------------------------ 27
6.5.1 PID block data setting ------------------------------------------------------------------------ 27
6.5.2 Time signal block data setting -------------------------------------------------------------- 29
6.5.3 Wait block data setting ----------------------------------------------------------------------- 32
6.5.4 Alarm block data setting ---------------------------------------------------------------------- 35
6.5.5 Output block data setting --------------------------------------------------------------------- 38
6.6 Number of repetitions of the pattern, Pattern link setting ----------------------------------- 41
6.7 Attached function setting ---------------------------------------------------------------------------- 43
6.7.1 Alarm parameter setting ---------------------------------------------------------------------- 43
6.7.2 Output parameter setting -------------------------------------------------------------------- 48
6.7.3 SV high/low limit value setting -------------------------------------------------------------- 54
6.7.4 Transmission output parameter setting --------------------------------------------------- 56
6.7.5 Input parameter setting ----------------------------------------------------------------------- 59
6.7.6 Communication parameter setting --------------------------------------------------------- 63
6.7.7 Other functions setting ------------------------------------------------------------------------ 66
6.8 Fixed value control parameter setting ----------------------------------------------------------- 75
6.8.1 SV setting ---------------------------------------------------------------------------------------- 75
6.8.2 PID parameter setting ------------------------------------------------------------------------- 76
6.8.3 Alarm value setting ---------------------------------------------------------------------------- 78
6.8.4 Attached function setting mode ------------------------------------------------------------- 80

7. Running

7.1 Program setting --------------------------------------------------------------------------------------- 82
7.2 Program control run ---------------------------------------------------------------------------------- 83
7.3 Fixed value control run ------------------------------------------------------------------------------ 85
7.4 Manual control Perform ----------------------------------------------------------------------------- 86
7.5 SV/MV/TIME display indication change --------------------------------------------------------- 88
7.6 Notes when performing AT ------------------------------------------------------------------------- 89
7.7 AT Perform/Cancel ----------------------------------------------------------------------------------- 90

8. Explanation of Control action and Alarm action

8.1 Fuzzy overshoot suppression PID action ------------------------------------------------------- 92
8.2 PID and ARW ------------------------------------------------------------------------------------------ 92
8.3 AT (auto-tuning) --------------------------------------------------------------------------------------- 93
8.4 Standard control action ------------------------------------------------------------------------------ 95
8.5 ON/OFF control action ------------------------------------------------------------------------------- 96
8.6 Heating/Cooling control action (DR, DS, DA option) (for PC-935) ------------------------ 97
8.7 When setting Open/Closed output dead band (for PC-955) ------------------------------ 100
8.8 Pattern end action ----------------------------------------------------------------------------------- 100
8.9 Alarm 1 (A1) to Alarm 4 (A4) actions ----------------------------------------------------------- 101
9. Other functions ---------------------------------------------------------------------------------- 103

10. Specifications

10.1 Standard specifications --------------------------------------------------------------------------- 104
10.2 Optional specifications ---------------------------------------------------------------------------- 107
11. Troubleshooting --------------------------------------------------------------------------------- 110
12. Default values ------------------------------------------------------------------------------------- 113
Index 1 (Program control) ---------------------------------------------------------------------------- 118
Index 2 (Fixed value control) ------------------------------------------------------------------------ 120
Program pattern graphing ---------------------------------------------------------------------------- 121
4

1. Model
1.1 Explanation of the model
Alphanumeric characters to represent the function or type are entered for the[Example].

PC – 9 3 5 – R / M, A2 , TS
Time signal output
Alarm 2 (A2) output
Relay contact output
PID control action
Standard model
PC- 9
5 Control 3
action5
Alarm action 5/ M,

Series name: PC-900 [96 x 96 x 100mm (W x H x D)]
PID
ON/OFF servo output PID
Alarm 3(A3): High limit, Alarm 4(A4): Low limit (*1)
R
Relay contact: 1a1b (PC-935) or 1a x 2 (PC-955) (*2)
Control output 1
S
Non-contact voltage (for SSR drive): 12+20 V DC
(OUT1)
A
DC current: 4 to 20mA DC
Input
M
Multi-range (*3)
A2
Alarm 2 (A2) (including Pattern end output 2) (*4, *5)
LA
Loop break alarm (*5, *7)
DR
Relay contact: 1aControl output 2 (OUT2)
Non-contact voltage (SSR drive):(Heating/Cooling control)DS
12+20 V DC(*4, *6)DA
DC current: 4 to 20mA DC
TA
DC
current: 4 to 20mA DC
OptionTransmission output
TV
DC voltage: 0 to 1V DC
C5EIA RS-485
Serial communicationC
EIA RS-232C
SVTC
Set value digital transmission
TS
Time signal
BK
Color: BlackIP
Dust-proof/Drip-proofTC
Terminal cover
Input range: Shipped as specified input range
Alarm type: Shipped as specified alarm type
User
specified OUT2 action mode: Shipped as specified OUT2 action mode
Transmission output: Shipped as specified output(See p.107 for detailed options.)(*1) 12 types of alarm action, No alarm action and pattern end output are selectable by internal Rotaryswitch and DIP switch.
(*2) The relay contact output is available only for the PC-955 type.
(*3) 16 input types (Thermocouple, RTD, DC current and DC voltage) are selectable by internal Rotaryswitch and DIP switch.
(*4) This option is not available for the PC-955 type.
(*5) When A2 and LA option are added together, they utilize common output terminals.
(*6) When this option is added, A2 or LA cannot be added.
(*7) For the PC-955 type, the LA indicator lights in case of burnout, however, output does not occur.

51.2 How to read the model label

Warning
Turn the power supply to the instrument OFF before confirming the model labels.
Working on or touching the terminal with the power switched ON may result in severe
injury or death due to electric shock.

Model labels are attached to the case and the left side of the inner assembly.
Model label (Example)
(1)
(2)
(3)

PC – 935 – R/M
A2

Relay contact output/ Multi-range input
Alarm 2 output

MULTI – RANGE
No. x x x x x x(1) Model(2) Option codes(3) Serial number6

2. Name and functions
4

3

2

1

10

11
12

5

13
14
15

6

16
17

7

18

8

19

9
(Fig. 2-1)
1

PV display
Indicates the PV (process variable) or setting characters in the setting mode with the red LED.

2

SV/MV/TIME display
Indicates the SV (desired value), MV (manipulated variable), Time or each set value in the setting
mode with the green LED. (The indication can be changed by the
key.)

3

PTN (Pattern number) display
Indicates the Pattern number with the yellow LED.

4

Program monitor indicator
During program control, the green LED ( ) lights when the PV is rising.
During program control, the green LED ( ) lights when the PV is constant.
During program control, the green LED ( ) lights when the PV is falling.

5

STEP (Step number) display
Indicates the Step number with the green LED.
The Step number flashes during wait action.

6

SV indicator
The green LED lights while the SV (desired value) is indicated on the SV/MV/TIME display.

7

OUT1 indicator
PC-935: Control output 1
The green LED lights when the Control output 1 (OUT1) is ON.
(With DC current output type, it flashes corresponding to the MV (manipulated variable)
at a cycle of every 125ms.)
PC-955: Control motor Open output
The green LED lights when the Control motor Open output (OUT1) is ON.
(With DC current output type, it flashes corresponding to the MV (manipulated variable)
at a cycle of every 125ms.)
7

8

OUT2 indicator
PC-935: Control output 2
The yellow LED lights when the Control output 2 (OUT2) is ON.
(With DC current output type, it flashes corresponding to the MV (manipulated variable)
at a cycle of every 125ms.)
PC-955: Control motor Closed output
The yellow LED lights when the Control motor Closed output (OUT2) is ON.
(With DC current output type, it flashes corresponding to the MV (manipulated variable)
at a cycle of every 125ms.)

9

Run indicator (Program control RUN)
During program control, the red LED lights.

10

A1/SB indicator: Alarm 1 output (including Pattern end 1 output)/Sensor burnout
The red LED lights when the Alarm 1 (A1) output or Pattern end 1 output is ON.
The red LED lights when the Sensor is burnt out.

11

A2/LA indicator: Alarm 2 output (including Pattern end 2 output)/ Loop break alarm output
The red LED lights when the Alarm 2 (A2) output or Pattern end 2 output is ON.
The red LED lights when the Loop break alarm output is ON.

12

A3 indicator: Alarm 3 output (including Pattern end 3 output)
The red LED lights when the Alarm 3 (A3) output or Pattern end 3 output is ON.

13

A4 indicator: Alarm 4 output (including Pattern end 4 output)
The red LED lights when the Alarm 4 (A4) output or Pattern end 4 output is ON.

14

MAN (Manual control) indicator
The red LED lights in Manual control.

15

AT (Auto-tuning) indicator
The 1st decimal point (AT) from the right on the SV/MV/TIME display flashes during auto-tuning.

16

MV indicator
The red LED lights while the MV (manipulated variable) of OUT1 is indicated on the
SV/MV/TIME display.
The red LED flashes while the MV (manipulated variable) of OUT2 is indicated on the
SV/MV/TIME display.

17

TIME indicator
The yellow LED lights while the time is indicated on the SV/MV/TIME display.

18

FIX (Fixed value control) indicator
The red LED lights during Fixed value control.

19

HOLD (Program control Hold) indicator
The red LED flashes when program control is being held.

8

1
2

8
3

4

5

6

7

(Fig. 2-2)
(Run/Program Key)• Run key: Starts the Program run. Cancels the Hold function when holding.
• Program Key: Changes the mode from Fixed value control to Program control.
Clears the program in Pattern setting mode.
(Set/Reset key)
• Set key: Proceeds to the Setting mode.
• Reset key: Returns to the Run mode.
(Pattern/Up key)
• Pattern key: Selects the Program pattern number.
• Up key: Increases the value on the SV/MV/TIME display, or changes the selection item.
(Stop/Mode key)
• Stop key: Stops the program control. Cancels the Pattern end output.
• Mode key: Switches or selects the Setting mode, and registers the setting data as the
does.

key

(Display/Back mode key)
• Display key: Changes the indication on the SV/MV/TIME display.
• Back mode key: Moves back to each setting mode.
(Fast key)
• Fast key: During program control, makes step time progress 60 times faster than usual.
Makes the numerical value change faster when setting.
(Hold/Enter key)
• Hold key: During program control, it pauses time progression, and controls the processwith the set value at that time.
• Enter key: Registers the setting data, and proceeds to the next item.
(Advance/Down key)
• Advance key: During program control, interrupts performing step, and proceeds to the next step.
• Down key: Decreases the value on the SV/MV/TIME display, or changes the selection item.

93. Setup
3.1 Drawing out the internal assembly
Before the power supply to this instrument is turned on, take the internal assembly out from the caseby pushing the hook (bottom of the instrument) in the direction indicated by the arrow and holding thelatches.

(Fig. 3.1-1)
3.2 Switch setting
Using a small flat blade screwdriver or tweezers, set the following by the Rotary switch and DIP switch:
Sensor input, Alarm 1 (A1) type, Alarm 2 (A2) type, Control action, Direct (Cooling)/Reverse (Heating)action, Alarm 1 and 2 standby functions, Unit / and Program start Auto/Manual
Rotary switch SW301 is equipped only when A2 option is added.

Control action

Alarm 2 type

Direct(Cool)/Reverse(Heat) action

Alarm 1 type

Alarm 1 standby action

Sensor input

Alarm 2 standby action/
Sensor input
Program start Auto/Manual

Rotary switch

DIP switch(Fig. 3.2-1)

10

3.2.1 Multi function of the DIP switch
The following items can be set by the DIP switch (SW304).
Default value: All switches OFF.
(Table 3.2.1-1)
Item

DIP
SW304
No.

Control action

1

Heating/Cooling
actionAlarm 1standby action
Alarm 2standby action*1/

Sensor input *2
Program startAuto/Manual3
4
5

Selection
PID (with AT function)
Fuzzy overshoot suppression PID
Heating (reverse) action
Cooling (direct) action
Without standby action
Standby action

OFF
ON
OFF
ON
OFF
ON

Without standby action

OFF

Standby action

ON
OFF
ON

6

7

8

DIP Switch
StatusK, J, R, B, N, PL- ,Pt100, JPt100 (with decimal point)
S, E, T, C, 4 to 20mA, 0 to 20mA,
0 to 1V, Pt100 (no decimal point)
Manual start
Automatic start

OFF
ON
OFF
ON

• Be sure to turn the No. 2 DIP switch (SW304) always OFF.
*1: The A2 standby function works only when the A2 option is added.
*2: When selecting a sensor type, use this DIP switch (SW304) and the Rotary switch (SW303).

Program start for Program control• Manual start: When the power to the PC-900 is turned on, the mode turns to the standby mode.
Press thekey to start the preset program.
• Automatic start : When the power to the PC-900 is turned on, the preset program automaticallystarts from Step 0 directly.

11

3.2.2 Sensor selection
Select the sensor type by the rotary switch (SW303) and the DIP switch (SW304, No. 7),
andorby the DIP switch (SW304, No. 6).
Default value: K, -200 to 1370
Note: If the input type is changed, Scaling high/low limit and Transmission output high/low
limit value (optional) will become the altered input range high/low limit value.
(Table 3.2.2-1)
RotaryDIP
Scale range
SW303 SW304
Sensor type
DIP
DIP
No.
No.7
SW 304 (No. 6 OFF)SW 304 (N0. 6 ON)
0

OFF

K

-200 to 1370

-320 to 2500

1

OFF

J

-200 to 1000

-320 to 1800

2

OFF

R

0 to 1760

0 to 3200

3

OFF

B

0 to 1820

0 to 3300

4

OFF

PL-

0 to 1390

0 to 2500

5

OFF

N

0 to 1300

0 to 2300

6

OFF

Pt100

-199.9 to 850.0-199.9 to 999.9

7

OFF

JPt100-199.9 to 500.0-199.9 to 900.0

0

ON

S

0 to 1760

0 to 3200

1

ON

E

0 to 1000

0 to 1800

2

ON

T

-199.9 to 400.0-199.9 to 750.0

3ON

C (W/Re5-26)

0 to 2315

0 to 4200

4ON

4 to 20mA DC-1999 to 9999

5ON

0 to 20mA DC-1999 to 9999

6ON

0 to 1V DC-1999 to 9999

7

ON

Pt100

-200 to 850

12-320 to 1560

3.2.3 Alarm 1 (A1), Alarm 2 (A2) type selection
Alarm 1 (A1), Alarm 2 (A2) type and pattern end output for program control can be set by the Rotaryswitches SW302 and SW301.
The Rotary switch SW301 is equipped only when A2 option is added.
Rotary switch SW302: Alarm 1 (A1) type, Pattern end 1 output.
Rotary switch SW301: Alarm 2 (A2) type, Pattern end 2 output.
Default value: Rotary switch SW302 (A1): Pattern end 1 output
Rotary switch SW301 (A2): No alarm action
Note: If an alarm type is changed, the alarm set value becomes 0 (0.0).
(Table 3.2.3-1)
Alarm 1 (A1) type

Rotary switch(SW302) No.

Alarm 2 (A2) type

Rotary switch(SW301) No.

No alarm action0

No alarm action

0

High limit alarm

1

High limit alarm

1

Low limit alarm2

Low limit alarm

2

High/Low limits alarm

3

High/Low limits alarm

3

High/Low limit range alarm

4

High/Low limit range alarm

4

Process high alarm

5

Process high alarm

5

Process low alarm

6

Process low alarm

6

Pattern end 1 output

7

Pattern end 2 output

7

3.3 Inserting the internal assembly
When the setup is completed, insert the internal assembly into the case.
Securely insert the assembly until it is locked by the hook at the bottom of the instrument.
(A clicking sound should be heard.)

Caution
Do not confuse the top and bottom of the internal assembly.
If the assembly is inserted into the case by force in the wrong direction, the PCB (printed
circuit board) may be damaged.

13

4. Mounting to the control panel
4.1 Site selection
Ensure the mounting location corresponds to the following conditions:(1) A minimum of dust, and an absence of corrosive gases(2) No flammable, explosive gases(3) No mechanical vibrations or shocks(4) No exposure to direct sunlight, an ambient temperature of 0 to 50 (32 to 122 ) that does notchange rapidly, and no icing(5) An ambient non-condensing humidity of 35 to 85%RH(6) No large capacity electromagnetic switches or cables through which large current is flowing(7) No water, oil or chemicals or where the vapors of these substances can come into direct contact
with the unit
(8) Take note that the ambient temperature of this unit – not the ambient temperature of the control panel– must not exceed 50 (122 ) if mounted through the face of a control panel, otherwise the life of theelectronic components (especially electrolytic capacitors) of the unit will be shortened.

106.2

91

130

4.2 External dimensions, Panel cutout (Scale: mm)

+0.8

10

100

92 0

96

+0.8

92 0

106 (for TC option)+0.5

n x 96 3 0(Fig. 4.2-1)
Lateral close mounting
n: Number of units mounted(Fig. 4.2-2)

4.3 Mounting
Mountable panel thickness is 1 to 8mm.
Insert the PC-900 from the front of the panel. Attach mounting brackets by the holes top and bottomof the case, and secure the controller in place with the screws.
(As the case is made of resin, do not use excessive force while screwing in the mounting bracket, or
the case could be damaged.)
The torque should be 0.12N•m.
UP

Down

(Fig. 4.3-1)
14

5. Wiring
Warning
Turn the power supply to the instrument OFF before wiring or checking. Working on or
touching the terminal with the power switched ON may result in severe injury or death
due to electric shock.
Moreover, the instrument must be grounded before the power supply to the instrument
is turned on.
• The terminal block of this instrument is designed to be wired from the left side.
A lead wire must be inserted from the left side of the terminal, and fastened by the terminal screw.
• Dotted lines show options, and no terminal is equipped unless specified.
5.1 Terminal arrangement[PC-935 type]

Ground1

T.SIG1 31

11 TX[YA( - )]T.SIG2 32

12 RX[YB( + )]

2

+

21
TA or TV
22

3-

STOP 23

T.SIG3 33

H 4

HOLD 24

T.SIG4 34

14 b1

OUT1(R/M ) C 5

ADV 25

T.SIG5 35

15 b2

L 6

RUN 26

T.SIG6 36

16 COM7

COM 27

T.SIG7 37

17

8

28

T.SIG8 38

A 18

+ 18

COM 39B 19- 19

100 to 240V AC
or 24V AC/ DC

OUT2(DR)/A2/P. END2/LA

RS- 232C[RS- 485]

13 b0

P. SELECT

A4
9

29

A1/P. END1

A3
10

TC
B 20

30

RTD

+ 5

+ 17

+ 18

18

- 19

OUT1(S/M or A/M)

- 6

V DC

+ 7

- 19

OUT2(DS,DA)

mA DC

- 8
(Fig. 5.1-1)

15

[PC-955 type]
Ground100 to 240V AC
or 24V AC /DC

T. SIG1 31

11 TX [YA( - )]T. SIG2 32

12 RX[YB( + )]

2

+

21 +
TA or TV
22 -

3

-

STOP 23

T. SIG3 33

HOLD 24

T. SIG4 34

1

4RS- 232C[RS- 485]

13 b0
14 b1
P. SELECTCOM 5

ADV 25

T. SIG5 35

15 b2

Open output 6

RUN 26

T. SIG6 36

16 COM

Closed output 7

COM 27

T. SIG7 37

17

8

28

T. SIG8 38

A 18

+ 18

9

29

COM 39

B 19

- 19

A4
A1/P. END1

A3
10

TC
B 20

30

RTD

+ 17

+ 18

18

- 19
V DC

(Fig. 5.1-2)

- 19
mA DC

A1 to A4
: Alarm 1 output to Alarm 4 output
OUT1, OUT2 : Control output 1, Control output 2 (Heating/Cooling control)
DR, DS, DA : Heating/Cooling control output (Relay contact, Non-contact voltage, DC current)
TA, TV: Transmission output
LA: Loop break alarm output
P. SELECT : Pattern No. external selection
P. END: Pattern end output
T.SIG: Time signal output
STOP, HOLD, ADV, RUN, COM: External operation terminals

163.2mm

3.2mm

5.8mm or less

5.8mm or less

 Recommended terminal
Use a solderless terminal with an insulation sleeve in which an M3 screw fits as shown below.
The torque should be 0.63N•m.

(Fig. 5.1-3)

Solderlessterminal
Y-typeRing-type

Manufacturer

Model

Tightening torque

Nichifu Terminal Industries CO.,LTD.
Japan Solderless Terminal MFG CO.,LTD.
Nichifu Terminal Industries CO.,LTD.
Japan Solderless Terminal MFG CO.,LTD.

TMEV1.25-Y3
VD1.25-B3A
TMEV1.25-3
V1.25-3

0.63 N•m

17

5.2 Wiring examples

NoticeSelect a 3A fuse from European qualified products, and mount it with the holder in the external circuitwithin 3m of distance from the controller.

Notice• Use a thermocouple, compensating lead wire and RTD (3-wire system) according to the sensor input
specifications of this controller.
• This controller does not have a built-in power switch, circuit breaker or fuse.
It is necessary to install a power switch, circuit breaker or fuse in a circuit near the controller.
(Recommended fuse: Time-lag fuse, rated voltage 250V AC, rated current 2A)• In the case of 24V DC, do not confuse the polarity.
• With the relay contact output type, externally use a relay according to the capacity of the load toprotect the built-in relay contact.
• For the PC-955 type, install an electromagnetic switch between the PC-955 and control motor.
• When wiring, keep input wires (Thermocouple, RTD, etc.) away from AC sources or load wires toavoid external interference.
• Use a thick wire (1.25 to 2.0mm2) for grounding.

(Example) PC-935 type3-phase100 to 240V AC
Ground*Electromagnetic
switchHeaterPower
supply for
Alarm unit

Alarm unit
Thermocouple

Electric furnace(Fig. 5.2-1)* To prevent the unit from harmful effects of unexpected high level noise, it is recommended
that a surge absorber be installed between the electromagnetic switch coils.

18

(Example) PC-955 typeCOM
5

Power supply
for motor drive

OPEN output

18 +
Input
19 -

6

*

CLOSED output

Control motor

7

COM
OPEN
CLOSED
Furnace*

Valve(Fig. 5.2-2)

Electromagnetic
switch* To prevent the unit from harmful effects of unexpected high level noise, it is recommended
that a surge absorber be installed between the electromagnetic switch coils.

• External operation input terminals
Open collector input

Contact (pulse) input

23 STOP

23

STOP

24

HOLD

25

ADV

26

RUN

26 RUN27COM

27 COM

24 HOLD

Inside thecontroller

25 ADV(Fig. 5.2-3)

Inside thecontroller(Fig. 5.2-4)• Pattern number external selection• Time signal output terminals (TS option)
Open collector output: 8 circuits
Capacity: 24V DC Maximum 50mA

13 b0

31 TS1
14 b1

Inside thecontroller

32 TS215 b2

38 TS816 COM+ - 39 COM(Fig. 5.2-5)(Fig. 5.2-6)
19

Inside thecontroller

6. Operations
6.1 Operation flowchart
Power ONon+Standby mode (*2)

Program control run mode (*1)

<Programming mode>[] Program pattern setting mode (p.22)[] Block setting mode[

] Number of repetitions,
Pattern link setting mode
(See p.41)[] AT Perform mode
(See p.90)[] Attached function
setting mode[

] Auto/Manual control
switching mode
(See p.86)

20[] PID block(See p.27)[] Time signal block(See p.29)[] Wait block(See p.32)[] Alarm block(See p.35)[] Output block(See p.38)[] Alarm parameter(See p.43)[] Output parameter(See p.48)[] SV high/low limit value (See p.54)[] Transmission output
parameter(See p.56)[] Input parameter[] Communication parameter(See p.63)[] Other functions(See p.59)(See p.66)

If thekey is pressed in any mode, the mode returns to (*1), (*2) or (*3).
Setting items with dotted lines are optional, and they appear only when the options are added.

Fixed value control run mode (*3)<Fixed value control parameter setting mode>[] Fixed value control
parameter setting mode[

] AT Perform mode
(See p.90)[] Attached function
setting mode[

] Auto/Manual control
switching mode
(See p.86)

21[] SV (desired value) (See p.75)[] PID parameter(See p.76)[] Alarm value(See p.78)[] Alarm parameter (See p.43)[] Output parameter (See p.48)[] SV high/low limit value(See p.54)[] Transmission output
parameter(See p. 56)[] Input parameter (See p.59)[] Communication parameter(See p.63)[] Other functions(See p. 66)

6.2 Key operation when setting• Press theor
key to change the set values or for selection.
When theandkeys or theandkeys are pressed simultaneously, thenumeric value changes faster when setting.
• To register the set values or selection, use theorkey.
• To revert to the Program control run mode, Standby mode or Fixed value control run mode fromany setting mode, press thekey.

6.3 Program pattern setting
If the current mode is Fixed value control run mode, press theFixed value control run mode

key to move to Standby mode.
Standby mode

The indicator (FIX) is lit.
The indicator (FIX) is unlit.
(Indications of each display and indicator differ depending on the status of the instrument.)(Fig. 6.3-1)
Program pattern setting
The setting procedures are shown below. Refer to p.122 (Program pattern graphing example).
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME

22

Pattern number
PTN

PV

STEP

SV/MV/TIME

Step 0 SV
PTN

PV

STEP

SV/MV/TIME

Step 0 time
PTN

PV

STEP

SV/MV/TIME

Step 0 PID block number
PTN

PV

STEP

SV/MV/TIME

Step 0 Time signal 1 (TS1) blocknumber
PTN

PV

STEP

SV/MV/TIME• Selection: 0 to 9
• Default value: Pattern number 0.

• Step SV is the value at the end of the step.
• Setting range: SV low limit to SV high limit value• Default value: 0 .

• Step time is the processing time of the step.
• Setting range: 00.00 to 99.59(Hour:Minute, or Minute:Second)
The time unit can be changed during
Step time unit selection mode.
• Default value: 00.00 (Hour:Minute).

• Selects PID block number.
PID block number is the number which was set during PID
block data setting mode.
• Selection: 0 to 9
• Default value: PID block number 0.

• Selects Time signal 1 (TS1) block number.
TS1 block number is the number which was set during TS
block data setting mode.
• Available only when Time signal output (TS option) is added.
Not available if Status output (RUN) is selected during [Timesignal output/Status output (RUN) selection for TS1].
• Selection: 0 to 15• Default value: TS1 block number 0.

23

Selection method, number and default values from [Time signal 2 (TS2) block number section]
to [Time signal 8 (TS8) block number selection] are the same as those of the [Time signal 1 (TS1)block number section], however, the following are different.
Time signal output/Status output (RUN) selection for TS1.
Time signal output/Status output (HOLD) selection for TS2.
Time signal output/Status output (WAIT) selection for TS3.
Time signal output/Status output (FAST) selection for TS4.
Time signal output/Status output (STOP) selection for TS5.

Step 0 Wait block number
PTN

PV

STEP

SV/MV/TIME

Step 0 Alarm block number
PTN

PV

STEP

SV/MV/TIME

Step 0 Output block number
PTN

PV

STEP

SV/MV/TIME• Selects Wait block number.
Wait block number is the number which was set during Wait
block data setting mode.
• Selection: 0 to 9
• Default value: Wait block number 0.

• Selects Alarm block number.
Alarm block number is the number which was set during
Alarm block data setting mode.
• Selection: 0 to 9
• Default value: Alarm block number 0.

• Selects Output block number.
Output block number is the number which was set during
Output block data setting mode.
• Selection: 0 to 9
• Default value: Output block number 0.

24

Data setting for Step 0 is completed. The indication on the Step display will be changed toand the unit proceeds to Step 1 SV setting.

(1),

To set other required items from Step 1 to Step 9, repeat settings as Step 0 (SV setting to Output
block number selection)
If thekey is pressed in the mode Step 9 Output block number selection, the unit returns to
Step 0 SV setting.

When settings are completed, press thekey.
The unit returns to the Standby or Program control run mode.

25

6.4 How to clear set values
Data for and after any step number in the program pattern can be cleared, and all set values can becleared as well.
If the data has been cleared once, the pattern data must be set again since the lost data cannot
be restored.
• How to clear the program pattern
Press thekey for 3 seconds for any item in the program pattern setting mode, then the program
pattern data for and after the step number being displayed on the Step number display will be cleared,
and the data returns to default values.
<Example>
When clearing the program pattern for and after Step 3 in Pattern 0.
At any setting item in Step 3, if the
key is pressed for 3 seconds, the data from Step 3 to Step 9
in Pattern 0 will be cleared.
(Data from Step 0 to Step 2 in Pattern 0 and Data from Pattern 1 to Pattern 9 are not cleared.)• How to clear all set values
In the standby mode, press the,andkeys at the same time for 3 seconds.
All set values except the proportional cycle of OUT1 and OUT2 return to default values, and the PV
display indicates [].
When the clearing is complete, [] on the PV display disappears, and the unit returns to Standby.

26

6.5 Block data setting
Block setting mode includes [PID block], [Time signal block], [Wait block], [Alarm block] and [Output block].
To set each block, make sure that the mode is Standby mode or Program control run mode.
If the current mode is in the Fixed value control run mode, press the
key to go to the Standby mode.
Refer to (Fig. 6.3-1).
6.5.1 PID block data setting
The setting procedures are shown below. Refer to p.122 (Program pattern graphing example).
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME

Block setting mode
PTN

PV

STEP

SV/MV/TIME

PID block
PTN

PV

STEP

SV/MV/TIME

Block 0 OUT1 proportional band
PTN

PV

STEP

SV/MV/TIME• Sets OUT1 proportional band for Block 0.
ON/OFF control when set to 0.0• Setting range: 0.0 to 999.9% (For PC-935)
0.1 to 999.9% (For PC-955)• Default value: 2.5%27

Block 0 Integral time
PTN

PV

STEP

SV/MV/TIME

Block 0 Derivative time
PTN

PV

STEP

SV/MV/TIME

Block 0

ARW

PTN

PV

STEP

SV/MV/TIME

Block 0 OUT2 proportional band

• Sets the Integral time for Block 0.
Setting the value to 0 disables the function.
• Setting range: 0 to 3600 sec. (For PC-935)
1 to 3600 sec. (For PC-955)• Default value: 200 sec.

• Sets the Derivative time for Block 0.
Setting the value to 0 disables the function.
• Setting range: 0 to 1800 sec.
• Default value: 50 sec.

• Sets the ARW (Anti-reset windup) value for Block 0.
Setting the value to 0 disables the function.
• Setting range: 0 to 100 %• Default value: 50 %• Sets the OUT2 proportional band for Block 0.

PTN

PV

Multiplying factor setting to OUT1 proportional band.
The equation is as follows.

STEP

SV/MV/TIME

ON/OFF control when OUT1 or OUT2 proportional band is set
to 0.0.
• Available only when the Heating/Cooling control (DR, DS or DA
option) is added.
• Not available for the PC-955 type.
• Setting range: 0.0 to 10.0 (Multiplying factor)• Default value: 1.0<Equation>
OUT2 proportional band = OUT1 proportional band x Multiplying factor

PID block data setting for Block 0 is completed. The indication on the PV display will be changed to[], and the unit proceeds to Block 1 OUT1 proportional band setting.

To set other required items from Block 1 to Block 9, repeat settings as Block 0 (OUT1
proportional band setting to OUT2 proportional band setting).
If thekey is pressed in the mode Block 9 OUT2 proportional band setting,the unit returns to Block 0 OUT1 proportional band setting.

When settings are completed, press thekey.
The unit returns to the Standby or Program control run mode.
28

6.5.2 Time signal block data setting
If the Time signal output (TS option) is added, Time signal block [on the PV display.

] will be indicated

The setting procedures are shown below. Refer to p.122 (Program pattern graphing example).
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME

Block setting mode
PTN

PV

STEP

SV/MV/TIME

PID block
PTN

PV

STEP

SV/MV/TIME

Time signal block
PTN

PV

STEP

SV/MV/TIME

29

Block 0 Time signal output
OFF time
PTN

PV

STEP

SV/MV/TIME

Block 0 Time signal output ON
time
PTN

PV

STEP

SV/MV/TIME• Sets the Time signal output OFF time for Block 0.
• Setting range: 00.00 to 99.59(Hour:Minute or Minute:Second)
Time unit can be changed during Step
time unit selection mode.
• Default value: 00.00 (Hour:Minute)• Sets the Time signal output ON time for Block 0.
• Setting range: 00.00 to 99.59(Hour:Minute or Minute:Second)
Time unit can be changed during Step
time unit selection mode.
• Default value: 00.00 (Hour:Minute)

Block 0 Time signal block data setting is completed. The indication on the PV display will be changedto [], and the unit proceeds to Block 1 Time signal output OFF time setting.

To set other required items, repeat settings as Block 0 (Time signal output OFF time setting
to Time signal output ON time setting).
If thekey is pressed in the mode Block 15 Time signal output ON time setting,the unit returns to Block 0 Time signal output OFF time setting .

When the setting is completed, press thekey.
The unit returns to the Standby or Program control run mode.

30

[Time signal function]
During program control, this provides Time signal outputs for each step within step time by setting theoutput OFF time and ON time.
• A maximum of 8 Time signal outputs (OFF time and ON time) can be set for each step number.
• By combining Output OFF time and Output ON time in one block, up to 16 blocks can be set.
(1) Time signal output operates in a sequence of Output OFF time and then Output ON time.
The signal automatically turns OFF when ON time expires within a step.
(2) If ON time is set to the same value as the Step time, the Time signal output will turn OFF for a brief
moment while Step numbers change.
Therefore, set the Time signal ON time longer than the step time so that Time signal output may turn ON
even when steps changes.
(3) When ON time is not the same value as Step time, from the point where steps move to the next step,
the Time signal output operates following the OFF or ON time of the next step, regardless of the Timesignal output setting of the previous step.
Program pattern example
Program pattern (Pattern No.0)
Step No.
0
500

1

0
Step SV
Step time (Hour:Minute)
PID block numberTime signal 1 block No.
ONOFFTime signal 2 block No.
ONOFFTime signal 3 block No.
ONOFFTime signal 4 block No.
ON
OFF

500
0:30
1
0

500
1:00
1
1

2

2

1

2

1

1

Output block number

0

1(Fig. 6.5.2-1)
Time signal block setting example
Output OFF time
Time signal block number(Hour:Minute)
0
0:00
1
0:20
2
0:00

Output ON time
(Hour:Minute)
0:00
0:30
0:30

31

(1) Time signal output turns OFF
after Time signal output ON time
has passed.
(2) If ON time is set to the samevalue as Step time, the Timesignal output will turn OFF for abrief moment while Step numberschange.
(3) When ON time is not thesame value as the Step time,from the point where steps
change, the Time signal output
operates following the OFF or ON
time of the next step, regardlessof the Time signal output of theprevious step.

6.5.3 Wait block data setting
The setting procedures are shown below. Refer to p.122 (Program pattern graphing example).
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME

Block setting mode
PTN

PV

STEP

SV/MV/TIME

PID block
PTN

PV

STEP

SV/MV/TIME

Press thekey until the Wait block mode[indicated on the PV display.
If [] is passed by mistake, use the

Wait block
PTN

PV

STEP

SV/MV/TIME

32

] is
key.

Block 0 Wait value
PTN

PV

STEP

SV/MV/TIME• Sets the Wait value for Block 0.
Wait action will be disabled if the wait value is set to 0 or
0.0.
• Setting range: 0 to 100 ( )Thermocouple T or RTD with a decimal point:
0.0 to 100.0 ( )DC input: 0 to 1000 (The placement of the decimal
point follows the selection.)• Default value: 0

Wait value setting for Block 0 is completed. The indication on the PV display will be changedto [], and the unit proceeds to Block 1 Wait value setting.

To set other required items from Block 1 to Block 9, repeat as Block 0 Wait value setting.
If thekey is pressed in the mode Block 9 Wait value setting, the unit returns to Block 0
Wait value setting.

When the setting is completed, press thekey.
The unit returns to the Standby or Program control run mode.

33

Wait function
During the program control run, the program does not proceed to the next step until the deviation between
PV (process variable) and SV (desired value) enters SV Wait value when the step ends.
The step time progress is suspended at that time.
The step number flashes during the Wait action.
The Wait function works on the condition that:
SV – Wait value

PV

SV + Wait value• In the case the program pattern is rising:
SV – Wait value
PV
Temperature C

Wait value 10 C
T

T

SV=500490
Step (Wait is set)Time
Moves to the next step at 490 C(Fig. 6.5.3-1)• In the case the program pattern is falling:PV
SV + Wait value
Temperature C
T

T

Step (Wait is set)510
SV=500
Wait value 10 C

Time
Moves to the next step at 510 C
Program pattern(Fig. 6.5.3-2)
PV (process variable)
Program pattern which is delayed by T due to the wait function

Wait function cancellation
To cancel the Wait function, press theor
key.
[ADV] or [STOP] input of the External operation function can cancel the Wait function as well.

34

6.5.4 Alarm block data setting
The setting procedures are shown below. Refer to p.122 (Program pattern graphing example).
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME

Block setting mode
PTN

PV

STEP

SV/MV/TIME

PID block
PTN

PV

STEP

SV/MV/TIME

Press thekey until the Alarm block mode [is indicated on the PV display.
If [] is passed by mistake, use theAlarm block
PTN

PV

STEP

SV/MV/TIME

35

key.

]

Block 0

Alarm 1 (A1) value

PTN

PV

STEP

SV/MV/TIME

Block 0Alarm 2 (A2) value

PTN

PV

STEP

SV/MV/TIME

Block 0Alarm 3 (A3) value

PTN

PV

STEP

SV/MV/TIME

Block 0Alarm 4 (A4) value

PTN

PV

STEP

SV/MV/TIME• Sets Alarm 1 (A1) value for Block 0.
• Setting the value to 0 or 0.0 disables the function (except
Process high and Process low alarm)• Not available because Pattern end 1 output has been selected
as a default value of Alarm 1 (A1).
Not available if No alarm action is selected by Rotary switch(SW302).
• When using Alarm 1 (A1) as an alarm action, selectAlarm 1 type by Rotary switch SW302 (A1).
• Setting range: See (Table 6.5.4-1).

• Sets Alarm 2 (A2) value for Block 0.
• Setting the value to 0 or 0.0 disables the function (except
Process high and Process low alarm)• Not available for the following cases.
(1) A2 option is not added.
(2) No alarm action or Pattern end 2 output is selected by
Rotary switch (SW301).
(3) PC-955 type.
• Setting range: See (Table 6.5.4-1).
• Default value: 0• Sets Alarm 3 (A3) value for Block 0.
• Setting the value to 0 or 0.0 disables the function (except
Process high and Process low alarm)• Not available if No alarm action or Pattern end 3 output
is selected by key operation during Alarm 3 (A3) typeselection mode.
• Setting range: See (Table 6.5.4-1).
• Default value: 0• Sets Alarm 4 (A4) value for Block 0.
• Setting the value to 0 or 0.0 disables the function (except
Process high and Process low alarm)• Not available if No alarm action or Pattern end 4 output
is selected by key operation during Alarm 4 (A4) typeselection mode.
• Setting range: See (Table 6.5.4-1).
• Default value: 036

Alarm block data setting for Block 0 is completed. The indication on the PV display will be changedto [], and the unit proceeds to Block 1 Alarm 1 (A1) value setting.

To set other required blocks, repeat settings as Block 0 [Alarm 1 (A1) value setting to Alarm 4 (A4)value setting].
If thekey is pressed in the mode Block 9 Alarm 4 (A4) value setting, the unit returns toBlock 0 Alarm 1 (A1) value setting.

When the setting is completed, press thekey.
The unit returns to the Standby or Program control run mode.

Alarm 1 to Alarm 4 setting range (The same range is applicable to the alarm standby function.)(Table 6.5.4-1)
Setting range
Alarm type
Setting range(with decimal point )High limit alarm (*)-Input span to Input span
-199.9 to Input span
Low limit alarm (*)-Input span to Input span
-199.9 to Input span
High/Low limits alarm (*)
0 to Input span
0.0 to Input span
High/Low limit range alarm (*) 0 to Input span
0.0 to Input span
Input range low limit value-199.9 to Input range
Process high alarm
to Input range high limit value
high limit value
Input range low limit value-199.9 to Input range
Process low alarm
to Input range high limit value
high limit value(*): Deviation setting• For DC input, input span is the same as the scaling span.
The negative low limit value is -1999. (The placement of the decimal point follows the selection.)• When the input type is RTD with a decimal point or thermocouple T, the negative low limit valueis -199.9. (The placement of the decimal point follows the selection.)37

6.5.5 Output block data setting
The setting procedures are shown below. Refer to p.122 (Program pattern graphing example).
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME

Block setting mode
PTN

PV

STEP

SV/MV/TIME

PID block
PTN

PV

STEP

SV/MV/TIME

Press themode [
If [] is passed by mistake, use the

Output block
PTN

PV

STEP

SV/MV/TIME

key several times until the Output block] is indicated on the PV display.

38

key.

Block 0 OUT1 high limit value
PTN

PV

STEP

SV/MV/TIME

Block 0 OUT1 low limit value
PTN

PV

STEP

SV/MV/TIME

Block 0 OUT2 high limit value
PTN

PV

STEP

SV/MV/TIME

Block 0 OUT2 low limit value
PTN

PV

STEP

SV/MV/TIME• Sets OUT1 high limit value for Block 0.
• Setting range: OUT1 low limit value to 100%
DC current output: OUT1 low limit value to 105%
• Default value: 100%.

• Sets OUT1 low limit value for Block 0.
• Setting range: 0% to OUT1 high limit value
DC current output: -5% to OUT1 high limit value• Default value: 0%.

• Sets OUT2 high limit value for Block 0.
• Available only when the Heating/Cooling control output (OUT2)(DR, DS, DA option) is added.
• Not available for the PC-955 type.
• Setting range: OUT2 low limit value to 100%
DC current output (DA option): OUT2 low limit value to 105%
• Default value: 100%.

• Sets the OUT2 low limit for Block 0.
• Available only when the Heating/Cooling control output (OUT2)(DR, DS, DA option) is added.
• Not available for the PC-955 type.
• Setting range: 0% to OUT2 high limit value
DC current output (DA option): -5% to OUT2 high limit value• Default value: 0%.

39

Block 0 OUT1 rate-of-change
PTN

PV

STEP

SV/MV/TIME• Sets the OUT1 rate-of-change for Block 0.
Setting the value to 0%/sec disables the function.
• Setting range: 0 to 100%/sec• Default value: 0%/sec

Output block data setting for Block 0 is completed. The indication on the PV display will be changed to[], and the unit proceeds to Block 1 OUT1 high limit setting.

To set other required items, repeat settings as Block 0 (OUT1 high limit setting to OUT1 rate-of-change
setting).
If thekey is pressed in the mode Block 9 OUT1 rate-of-change setting, the unit returns toBlock 0 OUT1 high limit setting.

When the setting is completed, press thekey.
The unit returns to the Standby or Program control run mode.

40

6.6 Number of Repetitions of the Pattern, Pattern link setting
If the current mode is Fixed value control run mode, press theFixed value control run mode

key to move to Standby mode.
Standby mode

The indicator (FIX) is lit.
The indicator (FIX) is unlit.
(Indications of each display and indicators differ depending on the status of the instrument.)(Fig. 6.6-1)
Number of repetitions of pattern, pattern link setting
The setting procedures are shown below. Refer to p.122 (Program pattern graphing example).
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME

Press thekey until [] is indicatedon PV display.
If [] is passed by mistake, use thekey.
Number of repetitions andPattern link setting mode
PTN

PV

STEP

SV/MV/TIME

41

Pattern 0 Number of repetitions
PTN

PV

STEP

SV/MV/TIME

Pattern link between
Pattern 0 and Pattern 1
PTN

PV

STEP

SV/MV/TIME• Sets the Number of repetitions for Pattern 0.
• Setting range: 0 to 9999 times• Default value: 0 times• Selects whether to link the program between Pattern 0
and Pattern 1.
• Only pattern numbers in numerical order can be linked.
(e.g.)
Pattern 0 and 3: Link impossible
Pattern 0 and 1, 1 and 2: Link possible• The SV/MV/TIME display will show the below.
Pattern link DisabledPattern link Enabled• Default value: Pattern link Disabled
Setting for Pattern 0 is completed. The indication on the PTN display will change to “ ”, and the unit
proceeds to Pattern 1 Number of Repetitions setting.

To set the required items from Pattern 1 to Pattern 9, repeat settings as Pattern 0 (Number ofRepetitions setting to Pattern link between Pattern 0 and Pattern 1).
If thekey is pressed in the mode Pattern link between Pattern 9 and Pattern 0, then theunit returns to Pattern 0 Number of Repetitions setting.

When the setting is completed, press thekey.
The unit returns to the Standby or Program control run mode.

42

6.7 Attached function setting
Set each parameter for Alarm, Output, SV high/low limit, Transmission output, Input, Communication
and Other functions as required.
6.7.1 Alarm parameter setting
The alarm parameter setting items of Program control run mode are the same as those of Fixedvalue control run mode.
This section describes how to set the alarm parameters in the Program control run mode.
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME• For Fixed value control parameter setting mode,the characters [] are indicated on the PV display.

Press thekey several times until Attached function
setting mode [] is indicated on the PV display.
If [] is passed by mistake, press the
key.
Attached function setting mode
PTN

PV

STEP

SV/MV/TIME

Alarm parameter
PTN

PV

STEP

SV/MV/TIME

43

Alarm 3 (A3) type
PTN

PV

STEP

SV/MV/TIME• Selects Alarm 3 (A3) type.
• If an alarm type is changed, Alarm 3 (A3) value becomes
0 (0.0).
• Selecting item: See the diagram below.
• Default value: High limit alarm.

The SV/MV/TIME display will show the below.
No alarm action
High limit alarmHigh limit alarm with Standby
Low limit alarm
Low limit alarm with Standby
High/Low limits alarm
High/Low limits with Standby
High/Low limit range alarm
High/Low limit range alarm with Standby
Process high alarm
Process high alarm with Standby
Process low alarm
Process low alarm with Standby
Pattern end 3 output

44

Alarm 4 (A4) type
PTN

PV

STEP

SV/MV/TIME

Alarm 1 (A1) hysteresis
PTN

PV

STEP

SV/MV/TIME

Alarm 2 (A2) hysteresis
PTN

PV

STEP

SV/MV/TIME

Alarm 3 (A3) hysteresis
PTN

PV

STEP

SV/MV/TIME

Alarm 4 (A4) hysteresis
PTN

PV

STEP

SV/MV/TIME• Selects Alarm 4 (A4) type.
• If an alarm type is changed, Alarm 4 (A4) value becomes
0 (0.0).
• Selecting item: The same as Alarm 3 (A3) type selection.
• Default value: Low limit alarm.

• Sets Alarm 1 (A1) hysteresis.
• Not available if Pattern end 1 output is selected, or if No
alarm action is selected by the Rotary switch SW302.
• Setting range: 0.1 to 100.0 ( )• Default value: 1.0 .

• Sets Alarm 2 (A2) hysteresis.
• Not available for the following cases(1) A2 option is not added.
(2) No alarm action or Pattern end 2 output is selectedby the Rotary switch SW301.
(3) PC-955 type.
• Setting range: 0.1 to 100.0 ( )• Default value: 1.0• Sets Alarm 3 (A3) hysteresis.
• Not available if No alarm action or Pattern end 3 output
is selected by keypad during Alarm 3 (A3) type selection• Setting range: 0.1 to 100.0 ( )• Default value: 1.0• Sets Alarm 4 (A4) hysteresis.
• Not available if No alarm action or Pattern end 4 output
is selected by keypad during Alarm 4 (A4) type selection.
• Setting range: 0.1 to 100.0 ( )• Default value: 1.0

45

Alarm 1 (A1) delay timer
PTN

PV

STEP

SV/MV/TIME

Alarm 2 (A2) delay timer
PTN

PV

STEP

SV/MV/TIME

Alarm 3 (A3) delay timer
PTN

PV

STEP

SV/MV/TIME

Alarm 4 (A4) delay timer
PTN

PV

STEP

SV/MV/TIME• Sets Alarm 1 (A1) delay timer.
Alarm output turns ON when the setting time has
passed after the PV enters the Alarm output range.
• Not available if Pattern end 1 output is selected (default
value), or if No alarm action is selected by the Rotaryswitch SW302.
• Setting range: 0 to 9999 seconds• Default value: 0 seconds• Sets Alarm 2 (A2) delay timer.
Alarm output turns ON when the setting time has
passed after the PV enters the Alarm output range.
• Not available for the following cases.
(1) A2 option is not added.
(2) No alarm action or Pattern end 2 output isselected by the Rotary switch SW301.
(3) PC-955 type.
• Setting range: 0 to 9999 seconds• Default value: 0 seconds• Sets Alarm 3 (A3) delay timer.
Alarm output turns ON when the setting time has
passed after the PV enters the Alarm output range.
• Not available if No alarm action or Pattern end 3 output
is selected by keypad during Alarm 3 (A3) type selectionmode.
• Setting range: 0 to 9999 seconds• Default value: 0 seconds• Sets Alarm 4 (A4) delay timer.
Alarm output turns ON when the setting time has
passed after the PV enters the Alarm output range.
• Not available if No alarm action or Pattern end 4 output
is selected by keypad during Alarm 4 (A4) type selectionmode.
• Setting range: 0 to 9999 seconds• Default value: 0 seconds

46

Loop break alarm time
PTN

PV

STEP

SV/MV/TIME

Loop break alarm span
PTN

PV

STEP

SV/MV/TIME• Sets the assessment time for the Loop break alarm.
• Available when the Loop break alarm option is added.
• Setting range: 0 to 200 minutes• Default value: 0 minutes• Sets the assessment span for the Loop break alarm.
• Available when the Loop break alarm option is added.
• Setting range: 0 to 100 ( )For thermocouple T, or RTD with a decimal point:
0.0 to 100.0 ( )For DC input: 0 to 1000 (The placement of the decimal
point follows the selection.)• Default value: 0

Setting for Alarm parameter is completed. If the
key is pressed in the mode Loop
break alarm span setting, the unit proceeds to Alarm 3 (A3) type selection.

When the setting is completed, press thekey.
The unit returns to the Standby or Program control run mode.

Loop break alarm The alarm will be activated when the PV does not rise as much as the span or more within
the time it takes to assess the loop break alarm after the MV has reached 100% or the
output high limit value.
 The alarm will also be activated when the PV does not fall as much as the span or more
within the time it takes to assess the loop break alarm after the MV has reached 0% or the
output low limit value.
 When the control action is Direct (Cooling), read “fall” for “rise” and vice versa.

47

6.7.2 Output parameter setting
Setting items in the Program control run mode are almost the same as those of Fixed value control
run mode. However, setting items such as [OUT1 high limit value], [OUT1 low limit value], [OUT1
rate-of-change], [OUT2 high limit value] and [OUT2 low limit value] in Fixed value control are notindicated in the Program control run mode.
This section describes how to set the output parameters in the Program control run mode.
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME• For Fixed value control parameter setting mode,[] is indicated on the PV display.

Press thekey several times until Attached function
setting mode [] is indicated on the PV display.
If [] is passed by mistake, press the
key.
Attached function setting mode
PTN

PV

STEP

SV/MV/TIME

Alarm parameter
PTN

PV

STEP

SV/MV/TIME

48

Output parameter
PTN

PV

STEP

SV/MV/TIME

OUT1 proportional cycle
PTN

PV

STEP

SV/MV/TIME

OUT1 high limit value
PTN

PV

STEP

SV/MV/TIME

OUT1 low limit value
PTN

PV

STEP

SV/MV/TIME• Sets OUT1 proportional cycle.
• For the PC-955, OUT1 proportional cycle is the MV
computation cycle. Control is performed by computing the
MV periodically (with programmable period).
• Not available for the DC current output.
• Setting range: 1 to 120 seconds• Default value:
Relay contact output type: 30sec
Non-contact voltage output type: 3sec

• Sets OUT1 high limit value.
• Available only for Fixed value control parameter setting mode.
• Setting range: OUT1 low limit value to 100%
DC current output: OUT1 low limit value to 105%
• Default value: 100%.

• Sets OUT1 low limit value.
• Available only for Fixed value control parameter setting mode.
• Setting range: 0% to OUT1 high limit value
DC current output: -5% to OUT1 high limit value• Default value: 0%.

49

OUT1 ON/OFF hysteresis
PTN

PV

STEP

SV/MV/TIME

OUT1 rate-of-change
PTN

PV

STEP

SV/MV/TIME

OUT2 proportional cycle
PTN

PV

STEP

SV/MV/TIME

OUT2 action mode
PTN

PV

STEP

SV/MV/TIME• Sets OUT1 ON/OFF hysteresis.
• Not available for the PC-955 type.
• Setting range: 0.1 to 100.0 ( )• Default value: 1.0• Sets OUT1 rate-of-change.
• Available only for Fixed value control parametersetting mode.
• Setting range: 0 to 100%/sec• Default value: 0%/sec• Sets OUT2 proportional cycle.
• Available only when the DR or DS option is added.
• Not available for the PC-955 type and the DC current
output.
• Setting range: 1 to 120 seconds• Default value:
Relay contact output type: 30sec
Non-contact voltage output type: 3sec

• Selects a cooling action for OUT2.
• Available only when the DR, DS or DA option is added.
• Not available for the PC-955 type.
• Selecting item: The SV/MV/TIME display will show the below.
• Default value: Air cooling

Air cooling (Linear characteristic)
Oil cooling (1.5th power of the linear characteristic)
Water cooling (2nd power of the linear characteristic)50

OUT2 high limit value
PTN

PV

STEP

SV/MV/TIME• Sets OUT2 high limit value.
• Available only when the DR, DS or DA option is added.
• Available only for Fixed value control parameter settingmode.
• Not available for the PC-955 type.
• Setting range: OUT2 low limit value to 100%
DC current output: OUT2 low limit value to 105%
• Default value: 100%

• Sets OUT2 low limit value.
• Available only when the DR, DS or DA option is added.
• Available only for Fixed value control parameter settingmode.
• Not available for the PC-955 type.
• Setting range: 0% to OUT2 high limit value
DC current output: -5% to OUT2 high limit value• Default value: 0%

OUT2 low limit value
PTN

PV

STEP

SV/MV/TIME

OUT2 ON/OFF hysteresis
PTN

PV

STEP

SV/MV/TIME

Overlap band/Dead band
PTN

PV

STEP

SV/MV/TIME• Sets OUT2 ON/OFF hysteresis.
• Available only when the DR, DS or DA option is added.
• Not available for the PC-955 type.
• Setting range: 0.1 to 100.0 ( )• Default value: 1.0• Sets the Overlap band/Dead band of OUT1 and OUT2.
Dead band: + setting, Overlap band: - setting• Available only when the DR, DS or DA option is added.
• Not available for the PC-955 type.
• Setting range: OUT1 proportional band converted value• Default value: 0.0

How to calculate Proportional band converted value:[Calculation example] Sensor input: Thermocouple K, -200 to 1370
Proportional band: 10.0%
Calculating equation: Pc=(Sr x Pb)

Pc: Proportional band converted value ( 157)
Where Sr: Sensor span (1570)
Pb: Proportional band (0.1)
According to the calculation above mentioned, the Overlap band/Dead bandsetting range is 157.0 .

51

Open/Closed output dead band
PTN

PV

STEP

SV/MV/TIME

Open output time
PTN

PV

STEP

SV/MV/TIME

Closed output time
PTN

PV

STEP

SV/MV/TIME• Sets the dead band value for Open output and Closed
output.
• Available only for the PC-955 type.
• Setting range: 0.1 to 100.0% (OUT1 proportional band
converted value)• Default value: 3.0%

• Sets the time from valve Fully Closed to valve Fully Open.
• Available only for the PC-955 type.
• Setting range: 0.1 to 999.9 seconds• Default value: 30.0 seconds• Sets the time from valve Fully Open to valve Fully Closed.
• Available only for the PC-955 type.
• Setting range: 0.1 to 999.9 seconds• Default value: 30.0 seconds

The unit returns to OUT1 proportional cycle setting.

When the setting is completed, press thekey.
The unit returns to the Standby or Program control run mode.

52

OUT1 rate-of-change
In the case of heating control, when the PV (process variable) is lower than the SV (desired value), theOUT1 MV (manipulated variable) generally changes from OFF to ON as shown in (Fig. 6.7.2-1).
However, if OUT1 rate-of-change is set, the rate-of-change of OUT1 MV can be changed as shown in(Fig. 6.7.2-2).
For example, this function can be used for a high temperature heater (used at approximate 1500 to1800 ) which has to be heated gradually, as the heater is easily burnt out if the power is supplied rapidly.

ON (100%)

OFF (0%)(Fig. 6.7.2-1)
100%/sec.
20%/sec.
ON (100%)

10%/sec.

OFF (0%)
1 sec.

10 sec.

5 sec.

(Fig. 6.7.2-2)
Automatic measurement of Open output time and Closed output time
Press theandkeys simultaneously after checking that the valve position is Fully Closed or
Fully Open.
The mode switches to automatic measurement of Open output time or Closed output time, and counting
starts from 0.0 seconds. (Control motor open output or closed output is turned ON, and the motor will
move to open or closed direction.)
When the valve reaches Fully Open or Fully Closed, press the
key. Counting stops, and Open
output or Closed output time will be automatically registered. (Control motor open or closed output isturned OFF.)53

6.7.3 SV high/low limit value setting
Setting items in the Fixed value control run mode are the same as those of Program control run
mode.
This section describes how to set the SV high/low limit value in the Program control run mode.
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME• For Fixed value control parameter setting mode,[] is indicated on the PV display.

Press thekey several times until Attached function
setting mode [] is indicated on the PV display.
If [] is passed by mistake, press the
key.
Attached function setting mode
PTN

PV

STEP

SV/MV/TIME

Alarm parameter
PTN

PV

STEP

SV/MV/TIME

Press thekey until SV high/low limit value mode[
] is indicated on the PV display.
If [] is passed by mistake, use the
key.

54

SV high/low limit value
PTN

PV

STEP

SV/MV/TIME

SV high limit value
PTN

PV

STEP

SV/MV/TIME

SV low limit value
PTN

PV

STEP

SV/MV/TIME• Sets the SV high limit value.
• Setting range: SV low limit to Input range high limit value
DC input: SV low limit to Scaling high limit value(The placement of the decimal point
follows the selection.)• Default value: 1370

• Sets the SV low limit value.
• Setting range: Input range low limit to SV high limit value
DC input: Scaling low limit to SV high limit value(The placement of the decimal point
follows the selection.)• Default value: -200

The unit returns to SV high limit setting.

When the required settings are completed, press thekey.
The unit returns to the Standby or Program control run mode.

55

6.7.4 Transmission output parameter setting
Setting items in the Program control run mode are the same as those of Fixed value control runmode.
If the Transmission output (TA, TV option) is added, [] will be indicated.
This section describes how to set the Transmission output parameter in the Program control run
mode.
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME• For Fixed value control parameter setting mode,[] is indicated on the PV display.

Press thekey several times until the Attached function
setting mode [] is indicated on the PV display.
If [] is passed by mistake, press the
key.
Attached function setting mode
PTN

PV

STEP

SV/MV/TIME

Alarm parameter
PTN

PV

STEP

SV/MV/TIME

Press thekey until Transmission output parametermode [] is indicated on the PV display.
If [] is passed by mistake, use the
key.

56

Transmission output parameter
PTN

PV

STEP

SV/MV/TIME

Transmission output type
PTN

PV

STEP

SV/MV/TIME• Selects a Transmission output type.
• Available when the Transmission output (TA, TV option)is added.
• Selecting item: The SV/MV/TIME display will show the
below.
PV transmission
SV transmission
MV transmission• Default value: PV transmission

Transmission output high limit
value
PTN

PV

STEP

SV/MV/TIME• Sets the Transmission output high limit value.
The high limit value corresponds to 20mA (TA option)
or 1V (TV option).
• Available when the Transmission output (TA, TV option)is added.
• Setting range: Transmission output low limit value
to Input range high limit value
For DC input, the placement of the decimal
point follows the selection.
• Default value: 1370

57

Transmission output low limit
value
PTN

PV

STEP

SV/MV/TIME• Sets the Transmission output low limit value.
The low limit value corresponds to 4mA (TA option)
or 0V (TV option).
• Available when the Transmission output (TA, TV option)is added.
• Setting range: Input range low limit value toTransmission output high limit value
For DC input, the placement of the decimal
point follows the selection.
• Default value: -200

Transmission output parameter setting is completed.
The unit returns to Transmission output high limit setting.

When the desired settings are completed, press thekey.
The unit returns to the Standby or Program control run mode.

When the Transmission output type is changed during Transmission output type selection mode,
the Transmission output high limit and low limit value are changed as follows.
(Table 6.7.4-1)
Transmission output Transmission output
Transmission output typehigh limit value
low limit value
PV transmission
Input range
Input range
high limit value*
low limit value*
SV transmission
MV transmission
100.0
0.0
* For Thermocouple K input, High limit value: 1370 , Low limit value: -200 .

During Standby mode, the Transmission output values are shown below.
(Table 6.7.4-2)
Transmission output typeTransmission output value
PV transmission
Outputs PV corresponding to the Transmission
output high or low limit value.
SV transmission
TA option: 4mA, TV option: 0V
MV transmission
TA option: 4mA, TV option: 0V

58

6.7.5 Input parameter setting
Setting items in the Program control run mode are the same as those of Fixed value control run
mode.
This section describes how to set the input parameter in the Program control run mode.
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME• For Fixed value control parameter setting mode,[] is indicated on the PV display.

Press thekey several times until Attached function
setting mode [] is indicated on the PV display.
If [] is passed by mistake, press the
key.
Attached function setting mode
PTN

PV

STEP

SV/MV/TIME

Alarm parameter
PTN

PV

STEP

SV/MV/TIME

Press thekey several times until Input parametermode [] is indicated on the PV display.
If [] is passed by mistake, use the
key.

59

Input parameter
PTN

PV

STEP

SV/MV/TIME

Scaling high limit value
PTN

PV

STEP

SV/MV/TIME

Scaling low limit value
PTN

PV

STEP

SV/MV/TIME• Sets the Scaling high limit value.
• Setting range: Scaling low limit value
to Input range high limit value
DC input: The placement of the decimal point
follows the selection.
• Default value: 1370

• Sets the Scaling low limit value.
• Setting range: Input range low limit value
to Scaling high limit value
DC input: The placement of the decimal point
follows the selection.
• Default value: -200

60

Decimal point place
PTN

PV

STEP

SV/MV/TIME• Selects the Decimal point place.
• Available only when DC (voltage/current) input is set during
Sensor type selection.
• Selecting item: The SV/MV/TIME display will show the below.

No decimal point
1 digit after the decimal point
2 digits after the decimal point
3 digits after the decimal point• Default value: No decimal point.

Sensor correction
PTN

PV

STEP

SV/MV/TIME

PV filter time constant
PTN

PV

STEP

SV/MV/TIME• Sets the sensor correction value.
• Setting range: -100.0 to 100.0 ( )DC input: -1000 to 1000 (The placement of the decimal
point follows the selection.)• Default value: 0.0 ( )• Sets the PV filter time constant.
• Setting range: 0.0 to 10.0 seconds• Default value: 0.0 seconds

Input parameter settings are completed.
The unit returns to Scaling high limit setting.

When the setting is completed, press thekey.
The unit returns to Standby or Program control run mode.

61

Sensor correction function
This corrects the input value from the sensor. When a sensor cannot be set at the exact location wherecontrol is desired, temperatures measured by the sensor may deviate from the temperature in thecontrolled location.
When controlling with plural controllers, sometimes the measured temperatures (input value) do notconcur due to differences in sensor accuracy or dispersion of load capacities.
In such a case, the control can be set at the desired temperature by adjusting the input value of sensors.
PV after sensor correction= Current PV+ (Sensor correction value)

PV filter time constantThis is a filter function on the software, which has the same effect as a CR filter.
By calculating first-order lag of PV, this suppresses input fluctuation caused by noise.
When the input value changes as shown in (Fig. 6.7.5-1), this function makes the input change slowly,
as shown in (Fig. 6.7.5-2).
T (PV filter time constant) is the time when input change reaches 63% of the desired PV.
100%
63%

T
(Fig. 6.7.5-1)(Fig. 6.7.5-2)

62

6.7.6 Communication parameter setting
Setting items in the Program control run mode are the same as those of Fixed value control runmode.
If the Serial communication [C, C5] option is added, communication parameter [] is indicated.
This section describes how to set the communication parameter in the Program control run mode.
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME• For Fixed value control parameter setting mode,[] is indicated on the PV display.

Press thekey several times until Attached function
setting mode [] is indicated on the PV display.
If [] is passed by mistake, press the
key.
Attached function setting mode
PTN

PV

STEP

SV/MV/TIME

Alarm parameter
PTN

PV

STEP

SV/MV/TIME

Press thekey several times until Communication
parameter mode [] is indicated on the PV display.
If [] is passed by mistake, use the
key.

63

Communication parameter
PTN

PV

STEP

SV/MV/TIME

Communication speed
PTN

PV

STEP

SV/MV/TIME• Selects the communication speed equal to that of the
Host computer.
• Available only when C or C5 option is added.
• Selecting item: The SV/MV/TIME display will show
the below.
2400bps
4800bps
9600bps
19200bps• Default value: 9600bps

Instrument number
PTN

PV

STEP

SV/MV/TIME• Sets the individual instrument number to the PC-900 whencommunicating by connecting plural PC-900 units.
When connecting plural PC-900 units, the instrument
number must not be duplicated.
• Available only when C or C5 option is added.
• Setting range: 0 to 95• Default value: 064Communication mode
PTN

PV

STEP

SV/MV/TIME• Selects either Serial communication or Set value
digital transmission.
• Available only when C or C5 option is added.
• Selecting item: The SV/MV/TIME display will show
the below.
Serial communication
Set value digital transmission• Default value: Serial communication.

Communication parameter setting is completed.
The unit returns to Communication speed selection.

When the setting is completed, press thekey.
The unit returns to the Standby or Program control run mode.

65

6.7.7 Other functions setting
Fixed value control run mode includes only two items [Set value lock] and [Output statuswhen input abnormal].
This section describes how to set Other functions in the Program control run mode.
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME• For Fixed value control parameter setting mode,[] is indicated on the PV display.

Press thekey several times until Attached function
setting mode [] is indicated on the PV display.
If [] is passed by mistake, press the
key.

Attached function setting mode
PTN

PV

STEP

SV/MV/TIME

Alarm parameter
PTN

PV

STEP

SV/MV/TIME

Press thekey several times until Other functions
setting mode [] is indicated on the PV display.
If [] is passed by mistake, use the
key.

66

Other functions
PTN

PV

STEP

SV/MV/TIME

Set value lock
PTN

PV

STEP

SV/MV/TIME• Selects either Unlock or Lock of set values.
• Selecting item: The SV/MV/TIME display will show
the below.
UnlockLock
Unlock: All setting items can be changed.
Lock: None of the setting items can be changed.
• Default value: Unlock

Step SV when program control
starts
PTN

PV

STEP

SV/MV/TIME

Program control start type
PTN

PV

STEP

SV/MV/TIME• Sets the Step SV when program control starts.
Program control starts from the Step SV regardless ofProgram control start type.
• Setting range: SV low limit to SV high limit
For DC input, the placement of the decimal
point follows the selection.
• Default value: 0• Selects the program control start type.
• Selecting item: The SV/MV/TIME display will show
the below.
PV start
PVr start
SV start• Default value: PV start67• PV start:
When the Program control starts, the SV (desired value) and step time are advanced
to the PV (process variable), then the Program control starts.
• PVr start:
Basically this is the same as PV start. However, even in pattern repeating, the SV andstep time are advanced to the PV, then the Program control starts.
• SV start:
When the Program control starts, the Program control starts from the SV which has
been set during “Step SV when program control starts” mode.

Status after power is restored
PTN

PV

STEP

SV/MV/TIME• Selects a status after the power is restored.
• Selecting item: The SV/MV/TIME will show the below.
Stops after power is restored.
(Stops performing program and returns to theStandby mode.)
Continues after power is restored.
(Continues performing program.)

Suspends after power is restored.
(Suspends program currently performing.)• Default value: Continues after power is restored.
Step time unit
PTN

PV

STEP

SV/MV/TIME• Selects the Step time unit for the program control.
• Selecting item: The following are indicated on the
SV/MV/TIME display
Hour:Minute
Minute:Second• Default value: Hour.Minute68Step time indication type
PTN

PV

STEP

SV/MV/TIME• Selects the Step time indication type when the
SV/MV/TIME display is changed to TIME display during
program control.
Select either Remaining time or Step time.
• Selecting item: The SV/MV/TIME display will show the below.
Remaining time
Step time• Default value: Remaining time

Step SV indication type
PTN

PV

STEP

SV/MV/TIME• Selects the Step SV indication type when the SV/MV/TIME
display is changed to SV display during program control.
Selects either SV corresponding to the step time progressor Step SV.
• Selecting item: The SV/MV/TIME display will show the below.
SV corresponding to the step time progress
Step SV• Default value: SV corresponding
corresponding toto thethe step
step time progress

Pattern end output time
PTN

PV

STEP

SV/MV/TIME• Sets the seconds desired for pattern end output time.
Setting the time to 0 causes continuous output until
thekey is pressed for 1 second or until thepower supply to the PC-900 is turned OFF.
• This function operates only when the Pattern end
output is selected for A1, A2, A3 or A4.
• Setting range: 0 to 9999sec.
• Default value: 0sec. (continuous output)

69

Step SV Hold function
at program end
PTN

PV

STEP

SV/MV/TIME• Selects either Not holding or Holding of step SV.
If Holding is selected, Step 9 SV is held when program control
ends, and then the Fixed value control is performed at theheld step SV.
• The PTN display flashes while the Holding function is working.
• To cancel Holding, press the
key for 1 secondor turn the power supply to the PC-900 OFF• Selecting item: The SV/MV/TIME display will show the below.
Not holding
Holding• Default value: Not holding• Not holding:
When the program is finished, and if the Pattern end output isselected, [] on the SV/MV/TIME display flashes, and Patternend output is turned ON. If it is not selected, the SV/MV/TIME
display indicates nothing.
• Holding:
When the program is finished, the Fixed value control is performedat Step 9 SV.
If no value is registered for Step 9 SV, the Fixed value control is
performed at the default value 0 .

Time signal output/Status output(RUN) for TS1
PTN

PV

STEP

SV/MV/TIME• Selects either Time signal output or Status output (RUN)
when Time signal 1 output (TS1) is used.
• Available only when the Time signal output option is added.
• Status output (RUN) is ON during Program control.
• Selecting item: The SV/MV/TIME display will show the below.
Time signal 1 output
Status output (RUN)• Default value: Time signal output [TS]70Time signal output/Status output(HOLD) for TS2
PTN

PV

STEP

SV/MV/TIME• Selects either Time signal output or Status output (HOLD)
when Time signal 2 output (TS2) is used.
• Available only when the Time signal output option is added.
• Status output (HOLD) turns ON when Program control issuspended.
• Selecting item: The SV/MV/TIME display will show the below.
Time signal 2 output
Status output (HOLD)• Default value: Time signal output [TS]Time signal output/Status output(WAIT) for TS3
PTN

PV

STEP

SV/MV/TIME• Selects either Time signal output or Status output (WAIT)
when Time signal 3 output (TS3) is used.
• Available only when the Time signal output option is added.
• Status output (WAIT) turns ON during Program control WAIT
action.
• Selecting item: The SV/MV/TIME display will show the below.
Time signal 3 output
Status output (WAIT)• Default value: Time signal output [TS]71Time signal output/Status output(FAST) for TS4
PTN

PV

STEP

SV/MV/TIME• Selects either Time signal output or Status output (FAST)
when Time signal 4 output (TS4) is used.
• Available only when the Time signal output option is added.
• Status output (FAST) turns ON while pressing the
key to increase the step time speed.
• Selecting item: The SV/MV/TIME display will show the below.
Time signal 4 output
Status output (FAST)• Default value: Time signal output [TS]Time signal output/Status output(STOP) for TS5
PTN

PV

STEP

SV/MV/TIME• Selects either Time signal output or Status output (STOP)
when Time signal 5 output (TS5) is used.
• Available only when the Time signal output option is added.
• Status output (STOP) turns ON when the controller is inStandby mode or when Program control ends.
• Selecting item: The SV/MV/TIME display will show the below.
Time signal 5 output
Status output (STOP)• Default value: Time signal output [TS]72Overshoot suppression factor
PTN

PV

STEP

SV/MV/TIME

Output status when input
abnormal
PTN

PV

STEP

SV/MV/TIME• Sets a factor to suppress overshoot.
• Setting the integral time to 0 disables this function.
• Available only when the DIP switch (SW304) No.1 is set to
ON side (to Control action Fuzzy overshoot suppression PID).
• Setting range: 0.0 to 10.0
• Default value: 1.0• Selects OUT1 or OUT2 status when the DC current or voltage
input is overscale or underscale.
• Available only for DC current and voltage input• Not available for the PC-955 type.
• Setting item: The SV/MV/TIME display will show the below.
Outputs OFF(4mA) or OUT1(OUT2) low limit value.
Outputs a value between OFF(4mA) and ON(20mA) or between OUT1(OUT2) low limit value
and OUT1(OUT2) high limit value, depending on
a deviation.
• Default value: Outputs OFF(4mA) or OUT1(OUT2) low limit value

Setting is completed.
The unit returns to Set value lock selection.

When the required settings are completed, press thekey.
The unit returns to the Standby or Program control run mode.

73

Overshoot suppression factor selection
When AT is performed with the optimal P, I, D and ARW values after AT multi mode was selected,
and if the overshoot or undershoot occurs at the step change point, set the overshoot suppression
factor to suppress the overshoot or undershoot.
1

Temperature

When overshoot occurs as shown 1 ,make the factor larger.

SV
2

When it takes too much time until stabilization
as shown 2 , make the factor smaller.

Time(Fig. 6.7.7-1)

74

6.8 Fixed value control parameter setting

Program control
run modeStandby mode
(Program control)

Programming
mode+
Fixed value control
run mode

Fixed value control
parameter setting mode

[ The FIX indicator lights][The FIX indicator lights]

6.8.1 SV setting
Fixed value control run mode
PTN

PV

STEP

SV/MV/TIME

Fixed value control parametersetting mode
PTN

PV

.
STEP

SV/MV/TIME

SV (desired value)
PTN

PV

STEP

SV/MV/TIME

SV setting
PTN

PV

STEP

SV/MV/TIME• Sets the SV (desired value).
• Setting range: SV low limit to SV high limit value• Default value: 0

When the setting is completed, press thekey.
The unit returns to Fixed value control run mode.

75

6.8.2 PID parameter setting
Fixed value control run mode
PTN

PV

STEP

SV/MV/TIME

Fixed value control parametersetting mode
PTN

PV

.
STEP

SV/MV/TIME

SV (desired value)
PTN

PV

STEP

SV/MV/TIME

PID parameter setting
PTN

PV

.
STEP

SV/MV/TIME

OUT1 proportional band
PTN

PV

STEP

SV/MV/TIME

Integral time
PTN

PV

STEP

SV/MV/TIME• Sets the proportional band for OUT1.
ON/OFF action when set to 0.0 (PC-935)• Setting range: 0.0 to 999.9% (PC-935)
0.1 to 999.9% (PC-955)• Default value: 2.5%

• Sets the integral time.
Setting the value to 0 disables the function.
• Setting range: 0 to 3600 seconds (PC-935)
1 to 3600 seconds (PC-955)• Default value: 200 seconds

76Derivative time
PTN

PV

STEP

SV/MV/TIME

ARW
PTN

PV

STEP

SV/MV/TIME

OUT2 proportional band
PTN

PV

STEP

SV/MV/TIME• Sets the Derivative time.
Setting the value to 0 disables the function.
• Setting range: 0 to 1800 seconds• Default value: 50 seconds• Sets the ARW (Anti-reset windup).
• Setting range: 0 to 100%
• Default value: 50%• Sets the OUT2 proportional band.
Multiplying factor setting to OUT1 proportional band.
Refer to the equation below.
ON/OFF action when OUT1 proportional band is set to 0.0%,
or when OUT2 proportional band is set 0.0• Available only when Heating/Cooling control (DR, DS, DA option)is added.
• Not available for the PC-955 type.
• Setting range: 0.0 to 10.0 (Multiplying factor)• Default value: 1.0<Equation>
OUT2 proportional band= OUT1 proportional band x Multiplying factor

PID parameter setting is completed.
The unit returns to OUT1 proportional band setting.

PID parameter setting is completed. Press thekey,then the unit returns to Fixed value control run mode.

77

6.8.3 Alarm value setting
Fixed value control run mode
PTN

PV

STEP

SV/MV/TIME

Fixed value control parametersetting mode
PTN

PV

.
STEP

SV/MV/TIME

SV (desired value)
PTN

PV

STEP

SV/MV/TIME

Press thekey twice until Alarm value setting mode [is indicated on the PV display.

]

Alarm value
PTN

PV

STEP

SV/MV/TIME

Alarm 1 (A1) value
PTN

PV

STEP

SV/MV/TIME• Sets Alarm 1 (A1) value.
• Setting the value to 0 or 0.0 disables the function(except Process high and Process low alarm).
• Not available if Pattern end 1 output (default value) is
selected, or if No alarm action is selected by the rotaryswitch (SW302).
• Setting range: See (Table 6.8.3-1).

78

Alarm 2 (A2) value
PTN

PV

STEP

SV/MV/TIME

Alarm 3 (A3) value
PTN

PV

STEP

SV/MV/TIME

Alarm 4 (A4) value
PTN

PV

STEP

SV/MV/TIME• Sets Alarm 2 (A2) value.
• Setting the value to 0 or 0.0 disables the function(except Process high and Process low alarm).
• Not available for the following cases.
(1) A2 option is not added.
(2) No alarm action or Pattern end 2 output is selectedby the Rotary switch (SW301).
(3) PC-955 type.
• Setting range: See (Table 6.8.3-1).
• Default value: 0 .

• Sets Alarm 3 (A3) value.
• Setting the value to 0 or 0.0 disables the function (except
Process high and Process low alarm).
• Not available if No alarm action or Pattern end 3 output
is selected by keypad during Alarm 3 (A3) type selectionmode.
• Setting range: See (Table 6.8.3-1).
• Default value: 0• Sets Alarm 4 (A4) value.
• Setting the value to 0 or 0.0 disables the function (except
Process high and Process low alarm).
• Not available if No alarm action or Pattern end 4 output isselected by keypad during Alarm 4 (A4) type selectionmode.
• Setting range: See (Table 6.8.3-1).
• Default value: 0

Alarm value setting is completed.
Press thekey. The unit returns to Fixed value control run mode.

Alarm 1 to Alarm 4 setting range (The same range is applicable to the Standby function)(Table 6.8.3-1)
Setting range
Alarm type
Setting range(with a decimal point)
High limit alarm (*)-Input span to Input span
-199.9 to Input span
Low limit alarm (*)-Input span to Input span
-199.9 to Input span
High/Low limits alarm (*)
0 to Input span
0.0 to Input span
High/Low limit range alarm (*) 0 to Input span
0.0 to Input span
Input range low limit value to-199.9 to Input range
Process high alarm
Input range high limit value
high limit value
Input range low limit value to-199.9 to Input range
Process low alarm
Input range high limit value
high limit value(*): Deviation setting
For DC input, the input span is the same as the scaling span.

796.8.4 Attached function setting modeThis includes the following parameters and setting items.
Setting method and items are the same as each parameter of Program control run mode.
[Alarm parameters]• Alarm 3 (A3) type• Alarm 4 (A4) type• Alarm 1 (A1) hysteresis• Alarm 2 (A2) hysteresis *1• Alarm 3 (A3) hysteresis• Alarm 4 (A4) hysteresis• Alarm 1 (A1) delay timer• Alarm 2 (A2) delay timer *1• Alarm 3 (A3) delay timer• Alarm 4 (A4) delay timer• Loop break alarm time *2• Loop break alarm span *2*1: Available when A2 option is added.
*2: Available when LA option is added.
[Output parameters]• OUT1 proportional cycle• OUT1 high limit value• OUT1 low limit value• OUT1 ON/OFF hysteresis• OUT1 rate-of-change• OUT2 proportional cycle *3• OUT2 action mode*3• OUT2 high limit value *3• OUT2 low limit value *3• OUT2 ON/OFF hysteresis *3• Overlap band/Dead band *3• Open/Closed output dead band *4• Open output time *4• Closed output time *4*3: Available when the [DR, DS, DA] option is added.
*4: Available only for the PC-955 type.

80

[SV high/low limit value]• SV high limit value• SV low limit value[Transmission output parameters]• Transmission output type *5• Transmission output high limit *5• Transmission output low limit *5*5: Available when the [TA or TV] option is added[Input parameters]• Scaling high limit value• Scaling low limit value• Decimal point place• Sensor correction• PV filter time constant[Communication parameters]• Communication speed *6• Instrument number *6• Communication mode *6*6: Available when the [C or C5] option is added.
[Other functions]• Set value lock
• Output status when input abnormal

81

7 Running
7.1 Program setting
Before starting the Program control, check the following.
[Before the power is turned on]• Mounting to the control panel• Wiring• Setup[After the power is turned on]
When the current mode is Fixed value control (The FIX indicator lights), press the
key toswitch to the Standby mode.
Press thekey in the Standby mode. The unit will proceed to the Programming mode.
From there, set the required items.
(When the current mode is Program control run mode, press the
key. The unit will proceed
to the Programming mode.)(1) Program pattern setting(2) Block data setting(3) Number of repetitions of pattern, Pattern link setting(4) Attached function setting
For the PC-955 type, set the Open/Closed output time setting in accordance with thespecifications of the control valve motor.
(5) Auto/Manual control switching(6) Pattern number selection[Pattern number selection by External operation]
Pattern numbers from 1 to 7 can be selected by external terminal connection.
The Pattern number selected by Pattern number External operation has priority over the number
selected by keypad on the front panel.
Even when “Pattern link Enabled” is selected, the Pattern number selected by Pattern number
External operation has priority.
(e.g.)
When pattern numbers 0 through 3 are linked, and if Pattern No.2 is selected by Pattern number
External operation, Pattern No. 2 currently linked will be selected.)
Select a Pattern number by connecting terminals 13, 14 and/or 15 (marked(Table 7.1-1)
Pattern number
Terminal number
0 1 2 3 4 5 6 7(13) b0(14) b1(15) b2) and 16 (COM).

(e.g.)To select Pattern number 7, connect (ON) terminals 13-16, 14-16, and 15-16.
To cancel the number, disconnect (OFF) terminals 13-16, 14-16, and 15-16.

82

7.2 Program control run[Program Automatic/Manual start]• Automatic start: Turn the power supply to the PC-900 on, then the program automatically starts
from Step 0 after warm-up status.
To set the automatic start, set the DIP switch (SW304) No. 8 ON
before turning the power supply to the PC-900 ON.
• Manual start : After the power is turned on and warm-up is completed, the program starts from
Step 0 by pressing the
key in the Standby mode.
For Fixed value control run mode, press the
key to return to the Standby.
Press thekey in the Standby mode.
The program will start from step 0.
To set the manual start, switch the DIP switch (SW304) No. 8 OFF
before turning the power supply to the PC-900 ON.

[SV start, PV start and PVr start when program control starts]• SV start : The program control starts from the SV which has been set during [Step SV when
program control starts] mode.
• PV start : The SV and step time are advanced to the PV, then the program control starts.
• PVr start : This is the same as the PV start. However, even when repeating the pattern,
the control also starts by PV start.

[Program control run by External operation]
Program control (RUN input) starts when terminals 26 – 27 are closed using a relay contact or open
collector output.
• RUN input: Program control starts when changed from OFF to ON.
Within 0.1sec

ActionStandbyControl startON

The following external settings operate
in the same way as RUN input.
(STOP input, HOLD input, ADV input)
STOP: Terminals 23 – 27
HOLD: Terminals 24 – 27

OFF

ADV : Terminals 25 – 27
0.1sec or longer(Fig. 7.2-1)[Program control suspension (HOLD)]
Press thekey to suspend the time progress temporarily, then the Fixed value control canbe performed at the SV for that time. The HOLD indicator (Red) flashes while time is being held.
To resume the program control, press the
key.

83

[Step progress (ADV)]
Each time thekey is pressed, the step progresses to the next.
Even if the Wait function is working, if the
key is pressed, the step progresses to the next.
[Step Regress]
Each time thekey is pressed while thekey is being pressed, the running step ends
its process, and goes back to the previous step, and performs the control.
[To make Step time progress faster (FAST)]
While thekey is held down, the time progress becomes 60 times faster than usual.
If the Wait action is set, the Wait function has priority over this function.
[To stop Program control in process (STOP)]
Press thekey, and the Program control will stop in process.
[Program control end (P. END)]
When the Program control is finished, the mode turns to the Standby, the A1/SB indicator lights
and [] flashes on the SV/MV/TIME display (The Pattern end output is turned ON.).
If thekey is pressed for 1 second or longer, the Pattern end output is turned OFF.

When step SV or step time is changed, the control is changed as follows.
[When the step SV is changed from SV1 to SV2.]
SV
SV2

SV1

: Pattern before change: Pattern after change

Changed point
Step nTime

Step n + 1(Fig. 7.2-2)[When the step time is changed from T1 to T2.]
SV

Changed point: Pattern before change: Pattern after change

T1
T2

Time
(Fig. 7.2-3)

84

7.3 Fixed value control run
Before starting the Fixed value control, check the following.
[Before the power is turned on](1) Mounting to the control panel(2) Wiring(3) Setup[After the power is turned on]
When the current mode is Program control run mode (PTN display lights), press the
key to enter Standby mode, then press the
key andkeys to enter Fixed value
control run mode.
Then press the
key to proceed to Fixed value control parameter setting mode (The PV
display indicates [].), and set the following when necessary.
(1) Fixed value control parameter setting(2) Attached function setting(3) Auto/Manual control switching
When the setting is completed, press thethe control target at the SV (desired value).

key. The control action starts so as to maintain[Key operations during Fixed value control]
key: Changes the SV indication to MV indication and vice versa on the SV/MV/TIME display.
key: Finishes the Fixed value control, and the mode switches to Program control Standby.

85

7.4 Manual control Perform
Sets output MV (manipulated variable) manually.
Auto/Manual control switching
The switching method is common to [Fixed value control run mode] and [Program control run mode].
The Program control is used for switching Auto/Manual control in this section.
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME• For Fixed value control parameter setting mode,[] is indicated on the PV display.

Press thekey until Auto/Manual control switchingmode [] is indicated on the PV display.
If [] is passed by mistake, press the
key.
Auto/Manual control
switching mode
PTN

PV

STEP

SV/MV/TIME• Selects control mode either Automatic or Manual.
• Setting item: The SV/MV/TIME display will show the below.

Auto/Manual control switching
PTN

PV

STEP

SV/MV/TIME

Automatic control
Manual control• Default value: Automatic control

When completed, press the

key.

86

[Key operation in Manual control]
During Manual control, use the,orkeys to increase or decrease the output MV(manipulated variable).
Setting range: [Fixed value control OUT1 low limit] to [Fixed value control OUT1 high limit value]
Maximum range, 0.0 to 100.0% (R/M, S/M),-5.0 to 105.0% (A/M)[Manual control when the Heating/Cooling control output (DR, DS, DA option) is added]
Setting range: [Fixed value control OUT2 high limit] to [Fixed value control OUT1 high limit]
Maximum range, -100.0 to 100.0% (R/M, S/M),-105.0 to 105.0% (A/M)[Manual control of the PC-955 type]
Control output MV
0.0% (Fully closed)
Control output MV
100.0% (Fully open)
When control output MV is 0.1% to 99.9%, Open output ON time and Closed output ON time
are determined by the control output MV and set values (Open/Closed output dead band,
MV computation cycle, Open output time, Closed output time, etc.).
Thus the valve flow rate is adjusted.

[With Manual control, refer to the following parameters for Fixed value control.]• OUT1 high limit value• OUT1 low limit value• OUT1 rate-of-change• OUT2 high limit value (when DR, DS or DA option is added to the PC-935)• OUT2 low limit value (when DR, DS or DA option is added to the PC-935)• Open output time (only for PC-955)• Closed output time (only for PC-955)[Balance/bumpless function]
This prevents sudden changes in output MV (manipulated variable) when the control mode isswitched from automatic to manual and vice versa.
• When the mode is changed from automatic to manual, the output MV before the change
becomes the default value for manual control.
• When the mode is changed from manual to automatic, the output MV before the change
becomes the default value for automatic control.

87

7.5 SV/MV/TIME display indication change
Each time thekey is pressed, the indication on the SV/MV/TIME display changes as follows.
• Program control
Step SV is indicated on the
SV/MV/TIME display.

SV indication(SV indicator is lit.)

MV indication (OUT1)(MV indicator is lit.)

OUT1 MV is indicated on the
SV/MV/TIME display.

MV indication (OUT2)(MV indicator flashes.)

OUT2 MV is indicated on the
SV/MV/TIME display.
(When the DR, DS or DA option is added.)

TIME indication(TIME indicator is lit.)

Step time is indicated on the
SV/MV/TIME display.

• Fixed value control
SV is indicated on the SV/MV/TIME display.

SV indication(SV indicator is lit.)

OUT1 MV is indicated on the SV/MV/TIME
display.

MV indication (OUT1)(MV indicator is lit.)

OUT2 MV is indicated on the SV/MV/TIME
display.
(When the DR, DS or DA option is added.)

MV indication (OUT2)(MV indicator flashes.)887.6 Notes when performing AT• If [] is selected during Set value lock selection mode, AT cannot be performed.
• During AT, none of the parameters can be set.
[In Program control run mode]
When AT is performed, the tuning starts at the same time as performance, and the step time
does not progress until AT is completed.
The remaining time is performed after AT is terminated.

SV

Time
AT is performing.

Time delayed by AT

Pattern before AT
Pattern after AT(Fig 7.6-1)
If Multi mode is selected during AT mode selection, AT is automatically performed at point A where 90%
of progressed time for each step has elapsed.
If there are the same PID blocks in one pattern (e.g. step 1 and 3), the tuning is performed only for the
first step (e.g. step 1), and other steps (e.g. step 3) are ignored.
After the AT is terminated for each step, the values such as OUT1 proportional band, Integral time,
Derivative time, ARW and OUT2 proportional band are automatically set to the PID block number
selected at each step.

A

At point A, AT is automatically
performed.

SV
A

A

A

Step number

1

2

3

4

5

PID block number

0

1

0

2

3

Time

(Fig. 7.6-2)
When Multi mode auto-tuning is selected, the AT indicator lights.
However, during AT after the time reaches point A, the AT indicator flashes.

89

7.7 AT Perform/Cancel
This section describes how to set AT (auto-tuning) in the Program control run mode.
Standby mode or
Program control run mode
PTN

PV

STEP

SV/MV/TIME

Program pattern setting mode
PTN

PV

STEP

SV/MV/TIME• For Fixed value control parameter setting mode,[] is indicated on the PV display.

Press thekey until AT Perform mode [is indicated on the PV display.
If [] is passed by mistake, press the]key.

AT Perform mode
PTN

PV

STEP

SV/MV/TIME• Selects AT Normal or Multi mode.
• Selecting item: The SV/MV/TIME display will show the below.

AT mode
PTN

PV

STEP

SV/MV/TIME

Normal mode
Multi mode
• Default value: Normal mode

• Normal mode: AT starts and performs immediately.
• Multi mode : AT is automatically started when 90% of the progressed
time of each step has passed.
However, if there are the same PID blocks in one pattern,
the tuning is performed only for the first step.
Multi mode is not available for the Fixed value control.

90• Selects AT Perform or Cancel.
• Selecting item: The SV/MV/TIME display will show the below.

AT Perform/Cancel
PTN

PV

STEP

SV/MV/TIME

AT Cancel
AT Perform• Default value: AT Cancel• AT Perform or Cancel can be set when controlling by Program or Fixed value.
During AT, the 1st decimal point from the right (AT) on the SV/MV/TIME display
flashes.
• During AT, none of the parameters can be set.
To change the set values during AT, cancel AT.
• When Normal mode is selected during AT mode selection, perform AT at each step.
• If AT is cancelled during performance, the values such as OUT1 proportional band,
Integral time, Derivative time, ARW and OUT2 proportional band will return to thevalues before AT was performed.
Auto-tuning will be forced to stop if it has not been completed within 4 hours.
The abovementioned values return to the values before AT was performed.
• When the AT is finished, the decimal point (AT, the 1st from the right) on the
SV/MV/TIME display goes off, and values such as OUT1 proportional band, Integral
time, Derivative time, ARW and OUT2 proportional band are automatically set.
• Refer to Section “8.3 AT” for AT action.

When completed, Press the

key.

91

8. Explanation of Control action and Alarm action
8.1 Fuzzy overshoot suppression PID action
Constantly monitors the rate-of-change of the control output MV and the rate-of-change of the deviation
between SV and PV from the start of program control, and suppresses the control output MV inadvance of the step change, thus preventing overshoot.
• Fuzzy overshoot suppression function is disabled when the integral time (I) is set to 0 sec.
• If Wait or Hold function works, Fuzzy overshoot suppression function will be cancelled.
8.2 PID and ARW
Proportional band (P)Proportional action is the action by which the control output varies in proportion to the deviation
between the SV (desired value) and the PV (process variable).
If the proportional band is narrowed, even if the output changes by a slight variation of the PV, better
control results can be obtained as the offset decreases.
However, if the proportional band is narrowed too much, even slight disturbances may cause variationin the PV, control action changes to ON/OFF action and the so-called hunting phenomenon occurs.
Therefore, when the PV comes to a balanced position near the SV and a constant temperature ismaintained, the most suitable value is selected by gradually narrowing the proportional band whileobserving the control results.
Integral time (I)Integral action is used to eliminate offset. When integral time is shortened, the returning speed to thesetting point is accelerated. However, the cycle of oscillation is also accelerated and the control
becomes unstable.
Derivative time (D)Derivative action is used to restore the change in the PV (processing variable) according to the rateof-change of the deviation between SV and PV. It reduces the amplitude of overshoot and undershootwidth.
If the derivative time is shortened, the restoring value becomes small, and if the derivative time isextended, an excessive returning phenomenon may occur and the control system may oscillate.
Anti-reset windup (ARW)ARW prevents overshoot (undershoot) caused by the integral action.
For Fixed value control, the smaller the ARW value, the fewer cases of overshoot (undershoot) causedby the integral action at the point where the PV reaches the SV. However, it takes time forstabilization.
For Program control, ARW is used with the overshoot suppression coefficient, and suppresses theovershoot (or undershoot) at the point where the gradient of each step is changed.
(When the Wait value is set, overshoot suppression coefficient does not work.)
ARW can be set automatically by performing AT. When setting ARW manually, set it to the duty factor
when the control is stabilized.

92

How to obtain the duty factor for ARW manually
Relay contact output, Non-contact voltage output:
Duty factor (%) =ON action time

x 100

Proportional cycle

DC current output:
Duty factor (%) =Output current value (mA)

4

16

x 100

• Set to 50% (default value) for the trial run, if duty factor is unknown.

8.3 AT (auto-tuning)

Caution• Perform AT (auto-tuning) during the trial run.
• Sometimes the AT process will not fluctuate if AT is performed at or near room temperature.
Therefore AT might not finish normally.
In order to set each value of P, I, D and ARW automatically, the AT process should be made tofluctuate to obtain an optimal value.

[In the case of a large difference between the SV (desired value) and PV (process variable)
as the temperature is rising]
The AT process will fluctuate at a temperature 1.5% of input span (scaling span) lower than the SV.

1.5% of input span (scaling span)

Temperature(1) Calculating PID constant(2) PID constant calculated(3) Controlled by the PID constantset by AT

SV

Time

AT starting point
(1)

(2)

(3)

(Fig. 8.3-1)

93[In the case of a stable control or when control temperature is within(scaling span)]

1.5% of input span

The AT process will fluctuate around the SV.
Temperature

1.5% of input span (scaling span)(1) Calculating PID constant(2) PID constant calculated(3) Controlled by the PID constantset by AT

SV

Time

AT starting point
(1)

(2)

(3)

(Fig. 8.3-2)[When control temperature is 1.5% of input span (scaling span) or more higher than the SV]
The AT process will fluctuate at a temperature 1.5% of input span (scaling span) higher than the SV.

Tempeature

1.5% of input span (scaling span)(1) Calculating PID constant(2) PID constant calculated(3) Controlled by the PID constantset by AT

SV

Time

AT starting point
(1)

(2)

(Fig. 8.3-3)

94

(3)

8.4 Standard control action
ActionHeating ( reverse) action

Cooling ( direct ) action

Proportional band

Proportional band

ON

ON
Control action

OFF

OFF
SV

SV

PC- 935

Relay contact
output

H4

H 4

H4

H4

H4

H 4

C5

C5

C5

C5

C 5

C5

L 6

L 6

L 6

L

L 6

L 6

6

(*1)

Non- contact
voltage output

+

5
6

-

+

5

12V DC(*1)

5

12/0 V DC
6

-

+

+

5

0 V DC
6

-

6

-

+

5

0 V DC
6

(*1)

+

5
DC current output

20 mA DC6--+
12 V DC

6

-

(*1)

+
5
20 to 4 mA DC
6
(*2)

5

0/12 V DC

-

5

+

+

5

4 mA DC
6-

4 mA DC
6

-

+
+
5
5
4 to 20 mA DC
20 mA DC
6
6
-

-

(*2)

Indicator[ OUT1 ] Green

Lit

Unlit

Unlit

Lit

PC- 955
Open output
terminals 5

6Closed output
terminals 5

5

5

5

5

5

5

6

6

6

6

6

6

7

7

7

7

7

7

7

(*1)

(*1)

Indicator[ OUT1 ] Green

Lit

Unlit

Unlit

Lit

Unlit

Lit

Lit

Unlit

Indicator[ OUT2 ] Yellow.

: Turns ON or OFF.

.

(*1) Cycle action is performed according to deviation.
(*2) Changes continuously according to deviation.

95

8.5 ON/OFF control action

ActionHeating ( reverse) action

Cooling ( direct ) action

Hysteresis

Hysteresis

ON

ON

OFF

OFF

Control actionSVSV

PC- 935

Relay contact
output

H4

H 4

H4

H4

C5

C 5

C5

C5

L 6

L 6

L 6

L 6

5

Non-contact
voltage output+

5

12 V DC6

5
DC current output

-

6

+

5

20 mA DC
6

-

+

5

+

0 V DC-

6+

5

4 mA DC
6-

5

0 V DC

-

6

+

5

-

+
20 mA DC

4 mA DC6+
12 V DC

6-

Indicator[ OUT1 ] Green

Unlit

Lit

Unlit

Lit

PC- 955
Open output
terminals 5

6

5

5

5

5

6

6

6

6

7

7

7

7

Closed output
terminals 5

7

Indicator[ OUT1 ] Green

Lit

Unlit

Unlit

Lit

Unlit

Lit

Lit

Unlit

Indicator[ OUT2 ] Yellow: Turns ON or OFF.

96

8.6 Heating/Cooling control action (DR, DS, DA option) (only for PC-935 type)
OUT1 P-band

OUT2 P-band

ON
Control action
OFF
SV
OUT1: Solid line

Relay contact
output

H 4

H 4

H 4

C 5

C 5

C 5

L 6

L 6

L 6

(*1)

5

Non-contact
voltage output

+

6

-

+

5

12V DC+5

12/0V DC

-

6

0V DC

-

6

(*1)

5

+
20mA DC

DC current output
6

-

5
+
20 to 4mA DC
6
-

+

5

4mA DC
6-(*2)
Indicator[OUT1] Green

Lit

Unlit

OUT2: Dotted line

Relay contact
output

7

7

7

8

8

8
(*1)

7
Non-contact
voltage output

+

8

-

+

7

7

-

8

+
12V DC

0/12V DC

0V DC

8

-

7

+

(*1)
7

+
4mA DCDC current output

8

-

7
+
4 to 20mA DC-

8

20mA DC
8-(*2)
Indicator[OUT2] Yellow

Lit

Unlit

: Turns ON or OFF.

(*1) Cycle action is performed according to deviation.
(*2) Changes continuously according to deviation.

97

When setting Dead band
Control output ( OUT1)

Action

Proportional
band

ON

Control output ( OUT2)
Proportionalband

Dead band

ON

Control action

OFF

OFF
SV

Relay contact
output

H 4

H 4

H 4

C 5

C 5

C 5

L 6

L 6

L 6

7

7

7

8

8

8

(*1)

+

5
Non-cotact
voltage output

5+
12/0V DC6-

12 V DC
6

(*1)

-

+

5

7

0 V DC
6

-

+

8

-

(*1)
5
Current output

5+
20 mA DC

6

-

+

7

0 V DC
8-+

7

0/12V DC

12V DC
8

-

(*1)

+

20 to 4mA DC
6
-

+

5

7

4 mA DC
6

-

(*2)

+
4 mA DC8-

7+
4 to 20mA DC
8
-

+

7

20 mA DC
8

-

(*2)

Indicator[ OUT1 ] Green

Lit

Unlit

Unlit

Lit

Indicator[ OUT2 ] Yellow: Turns ON or OFF.

(*1) Cycle action is performed according to deviation.
(*2) Changes continuously according to deviation.

98

When setting the Overlap band with Relay contact output
OUT1 proportional band
OUT2 proportional band

Control action

Overlap band

ON

ON

OFF

OFF
SV

Relay contact
Output(OUT1 )

Indicator[ OUT1 ]Green
Relay contact
Output(OUT2)

H 4

H 4

H 4

C 5

C 5

C 5

L 6

L 6

L 6

(*1)

Lit

Unlit

7

7

8

8

7
8
(*1)

Indicator[ OUT2 ]Yellow

Unlit

Lit: Turns ON or OFF.

(*1) Cycle action is performed according to deviation.

99

8.7 When setting Open/Closed output dead band (only for PC-955)

Example: Thermocouple K -------------------------- 200 to 1370 C
SV ---------------------------------------------- 600 C
Proportional band -------------------------- 2.5% (approx. 40 C)
Open and Closed output dead band--- 50.0% ( approx. 20 C)
ON
Open output (OUT1)OFF

ON
Closed output (OUT2)
OFF
570

560

580

590

600 (SV)

Dead band
Proportional band
: The MV (manipulated variable) is calculated and determinedby Open/Closed output dead band, MV computation cycle,
Open output time, Closed output time, etc.

8.8 Pattern end action

ON
OFF
Time
(Program control end)

Press the

9

9

9

10

10

10

Unlit

key to cancel

the Pattern end output.

Indicator
A1/SB (Red)

STOP
MODE

Unlit

Lit

Pattern end output is turned ON when the Program control is finished.
Pattern end output is not cancelled until the

100

STOP
MODE

key is pressed.

8.9 Alarm 1 (A1) to Alarm 4 (A4) actions
High limit alarm

Low limit alarm

Hysteresis

Hysteresis

ON

ON

OFF

OFF

Alarm action

SV
OutputAlarm value

Alarm value

SV

9

9

9

9

10

10

10

10

Indicator
Lit
Unlit
High limit alarm with standby

Unlit
Lit
Low limit alarm with standby

Hysteresis

Hysteresis

ON

ON

OFF

OFF

Alarm action

SV

OutputAlarm value

SV

Alarm value

9

9

9

9

10

10

10

10

Indicator
Unlit
Lit
High/Low limits alarm

Unlit
Lit
High/Low limit range alarm

Hysteresis

Hysteresis

ON

ON

Alarm action
OFF

OFF

SV

Alarm value

Alarm value

SV

Alarm value

Alarm value

9

9

9

9

9

9

10

10

10

10

10

10

OutputIndicator
Lit

Unlit

Lit

Unlit

 Standby function works at.
andshow the action point of the alarm output.
 Output terminals for Alarm 2 (A2): 7-8 (only for PC-935)
Output terminals for Alarm 3 (A3): 29-30
Output terminals for Alarm 4 (A4): 28-30

101

Lit

Unlit

High/Low limits alarm with standby

High/Low limit range alarm with standby
Hysteresis

Hysteresis
ON

ON

OFF

OFF

Alarm action
Alarm
value

Alarm
value

SV

Alarm
value

Alarm
value

SV

9

9

9

9

9

9

10

10

10

10

10

10

OutputIndicator
Lit

Lit

Unlit
Process high alarm

Unlit

Hysteresis

Lit
Process low alarm

Unlit

Hysteresis

ON

ON

OFF

OFF

Alarm action

Alarm
value

Alarm
value

9

9

10

10

9

9

10

10

OutputIndicator
Unlit
Lit
Process high alarm with standby
Hysteresis

Lit

ON

ON

OFF

OFF

Unlit
Process low alarm with standby
Hysteresis

Alarm action

Alarm
value

Alarm
value

9

9

9

9

10

10

10

10

OutputIndicator
Unlit

Lit

 Standby function works at.
andshow the action point of the alarm output.
 Output terminals for Alarm 2 (A2): 7-8 (only for PC-935)
Output terminals for Alarm 3 (A3): 29-30
Output terminals for Alarm 4 (A4): 28-30

102

Lit

Unlit

9. Other functions(1) Burnout
When the thermocouple or RTD input is burnt out, control output (OUT1, OUT2) is turned OFF (for DC
current output type, OUT1 or OUT2 low limit value), and the PV display flashes “”.
For manual control, the preset manipulated variable (MV) is outputted.
When DC input is disconnected, the PV display flashes “” for 4 to 20mA DC input, and “” for
0 to 1V DC input. For 0 to 20mA DC input, the PV display indicates the value corresponding with 0mA.
(2) Input abnormality indication
Output status
Output statuswhen input
abnormal*1

Contents andIndication

Overscale
Measured value
has exceeded
Indication range
high limit value.
"" flashes.
Underscale
Measured value
has dropped below
Indication range
low limit value.
"" flashes.

OUT1
OUT2
Direct(Cooling) Reverse(Heating) Direct(Cooling) Reverse(Heating)actionactionactionactionON (20mA) or
ON(20mA) or

OUT1 highlimit value *2
OFF (4mA)
or OUT1 low
limit value
OFF (4mA)
or
OUT1 low
limit valueOFF(4mA) or
OUT1 low
limit valueOFF(4mA) or
OUT2 low
limit value

ON (20mA) or
OUT1 highlimit value *2
OFF(4mA) or
OUT1 low
limit value

ON (20mA) or
OUT2 highlimit value *2
OFF(4mA) or
OUT2 low
limit value

OUT2 highlimit value *2
OFF(4mA)or OUT2 low
limit valueOFF(4mA)or
OUT2 low
limit value*1 This is available only for DC voltage and current input.

For PC-955 type, the output status will be the same one as whenis selected during “Output
status when input abnormal”.
For manual control, the preset manipulated variable (MV) is outputted.
*2 Outputs a value between OFF (4mA) and ON (20mA) or between OUT1 (or OUT2) low limit value
and OUT1 (or OUT2) high limit value, depending on deviation.
Thermocouple, RTD input:
Input
Input range
Indication range
Control range–199.9 to 400.0–199.9 to 405.0–205.0 to 405.0
T–199.9 to 750.0–199.9 to 759.0–209.0 to 759.0–199.9 to 850.0–199.9 to 860.0–210.0 to 860.0–200 to 850–210 to 860–210 to 860
Pt100–199.9 to 999.9–199.9 to 999.9–211.0 to 1010.9–320 to 1560
–338 to 1578
–338 to 1578
–199.9 to 500.0–199.9 to 506.0–206.0 to 506.0
JPt100–199.9 to 900.0–199.9 to 910.9–211.0 to 910.9
Indication range and Control range for thermocouple inputs other than the above:
Input range low limit value – (Input span x 1%) to Input range high limit value + (Input span x 1%)• DC input
Indication range : [Scaling low limit value – Scaling span x 1%] to [Scaling high limit value +Scaling span x 10%]
However, if the input value drops below –1999, the PV display flashes“”.
If the input value exceeds 9999, the PV display flashes “”.
Control range: [Scaling low limit value – Scaling span x 1%] to [Scaling high limit value +Scaling span x 10%](3) Self-diagnosis
The CPU is monitored by a watchdog timer, and if an abnormal status is found on the CPU, thecontroller is switched to warm-up status.
(4) Automatic cold junction temperature compensation (Thermocouple input type)This detects the temperature at the connecting terminal between the thermocouple and the instrument, andalways maintains it at the same status as if the reference junction location temperature was at 0 (32 ).
(5) Warm-up indication
For approximately 3sec after power-on, the input type and the temperature unit are indicated on the PV
display, and the input range high limit value (for DC input, scaling high limit value) is indicated on the
SV/MV/TIME display.
10310. Specifications

10.1 Standard specifications
Name
Programmable Controller: PC-935
ON/OFF SERVO Programmable Controller: PC-955
Mounting
Flush
Setting
Input system using membrane sheet key
Display
PV display
Red LED 4 digits, Character size 14.3x8mm (HxW)
SV/MV/TIME display Green LED 4 digits, Character size 10x5.5m (HxW)
Pattern No. display
Yellow LED 1 digit, Character size 8x4mm (HxW)
Step No. display
Green LED 1 digit, Character size 8x4mm (HxW)
Input
Thermocouple
RTD
DC current

DC voltage

K, J, R, S, B, E, T, C(W/Re5-26), N, PLExternal resistance 100 or less
For input burnout, Overscale
Pt100, JPt100 3-wire system
Allowable input lead wire resistance: 10 or less per wire
For input burnout, Overscale
0 to 20mA DC, 4 to 20mA DC
Input impedance: 50
For input disconnection: 0 to 20mA DC: The same as 0mA DC
4 to 20mA DC: Underscale
0 to 1V DC
Input impedance: 1M or more
Allowable input voltage 5V DC or less
Allowable signal source resistance, 2k or less
For input disconnection, Overscale

Input sampling
125ms
periodAccuracy
Within 0.2% of each input span 1digit, however,(indication, setting) K, J, T input, less than 0 (32 ): Within 0.4% of each input span 1digit
R, S input, range 0 to 200 (0 to 400 ): Within 4 (8 ).
B input, range 0 to 300 (0 to 600 ): Accuracy is not guaranteed.
(Cold junction temperature compensation accuracy, 1 , at 0 to 50 )Time indication
Within 0.1% of setting time
accuracy
Control output(OUT1)
Relay
1a1b (PC-955 type: 1a x 2)
contact
Control capacity: 3A 250V AC (resistive load)
1A 250V AC (inductive load cos =0.4)+2
Non-contact
12 0 V DC
voltage (forMax 40mA DC (short circuit protected)
SSR drive)
DC current
4 to 20mA DC(Isolated type)
Load resistance: Max 550

104

Alarm 1 (A1)
Alarm 3 (A3)
Alarm 4 (A4)

The alarm action point is set by the deviation from the SV (except Process
alarm).
When the input goes outside the range, the output turns ON or OFF (in the caseof High/Low limit range alarm).
Alarm type can be selected by internal switch or by keypad.
 No alarm action
 High limit alarm (Deviation setting) : Input span* (Off when set to 0)
 Low limit alarm (Deviation setting) : Input span* (Off when set to 0)
 High/Low limits alarm (Deviation setting) : 0 to input span* (Off when set to 0)
 High/Low limit range alarm (Deviation setting): 0 to input span* (Off when set to 0) Process high alarm : Input range low limit to input range high limit
 Process low alarm : Input range low limit to input range high limit* For DC input, input span is the same as scaling span.
Standby function Selectable
SettingWithin 0.2% of each input span 1digit
accuracy
ActionON/OFF action
Hysteresis
Thermocouple, RTD input: 0.1 to 100.0 ( )DC input: 1 to 1000 (The placement of the decimal point
follows the selection.)
OutputRelay contact, 1a ( A3, A4: 1a x 2 )Control capacity: 3A 250V AC (resistive load)
1A 250V AC (inductive load cos =0.4)(However, A3 and A4 common terminal: Max 3A)

Controlling
actionSelectable with the DIP switch.
 Fuzzy overshoot suppression PID (with AT)
 PID (with AT)
OUT1 proportional band (P) 0.0 to 999.9%(ON/OFF control when set to 0.0)
Integral time (I)
0 to 3600 sec
Derivative time (D)0 to 1800 sec
Proportional cycle
1 to 120 sec (Not available for DC current
output type)
ARW
0 to 100%
OUT1 high limit, low limit
0 to 100% (DC current output type: -5 to 105%)
Open output time
0.1 to 999.9 sec (For PC-955 type)
Closed output time
0.1 to 999.9 sec (For PC-955 type)
Hysteresis
Thermocouple, RTD input: 0.1 to 100.0 ( )DC input: 1 to 1000 (The placement of thedecimal point follows the selection.)

Supply voltage

100 to 240V AC 50/60Hz
24V AC/DC 50/60Hz
100 to 240V AC: 85 to 264V AC
24V AC/DC: 20 to 28V AC/DC
0 to 50 (32 to 122 )Allowable voltage
fluctuation
Ambient
temperature
Ambient
humidityPower
consumption

35 to 85%RH (non-condensing)
Approx. 15VA

105

Circuit insulation
configuration[PC-935]
Ground terminal

Insulated
Insulated

Control output (OUT1)
Insulated

Power source
InsulatedA

Insulated*2

CPU
Noninsulated*1

Control output (OUT2),
Alarm 2 (A2) output,
B
Loop break alarm output(LA)Noninsulated
Pattern number
external selection D

Input

Insulated

Communication C

Insulated
Transmission
F
outputNoninsulated
External
operation
input

G

Non-insulated

Insulated

Insulated

Insulated
Time signal output E

Alarm 1 (A1) output
Insulated
Alarm 3(A3), 4(A4) output(Fig. 10.1-1)*1: When both OUT1 and OUT2 are DC current output or Non-contact voltage
output, A is not insulated from B.
*2: When OUT1 is DC current output or Non-contact voltage output, A-C, A-D,
and A-E are not insulated from each other.
When OUT2 is DC current output or Non-contact voltage output, B-C, B-D,
and B-E are not insulated from each other.
Insulation resistance
10M or more, at 500V DC
An insulation test between the following must not be carried out because they
are not insulated from each other.
*1 (A-B), *2 (A-C, A-D, A-E, B-C, B-D, B-E, C-D-E, F-G) in (Fig. 10.1-1)[PC-955]
Ground terminal

Insulated
Insulated

Open output (OUT1)
Closed output (OUT2)Power source
Insulated

Insulated

Insulated

CPU

Communication A

TransmissionDoutputNoninsulated

Insulated

Input
Alarm 1 (A1) output
Insulated

Insulated

Alarm 3(A3), 4(A4) output

Insulated

Noninsulated
Pattern number
external
B
selection

NoninsulatedNon-insulated
External
operation E
input
Insulated

Time signal output C(Fig. 10.1-2)
Insulation resistance
10M or more, at 500V DC
A-B-C and D-E in (Fig. 10.1-2): An insulation test must not be carried out
because they are not insulated from each other.

106

Dielectricstrength

WeightExternal
dimensions
Material
Color
Attached
functions

Accessories

Between input terminal and ground terminal : 1.5kV AC for 1 minuteBetween input terminal and power terminal : 1.5kV AC for 1 minuteBetween power terminal and ground terminal : 1.5kV AC for 1 minuteBetween output terminal and power terminal : 1.5kV AC for 1 minuteBetween output terminal and ground terminal: 1.5kV AC for 1 minute
Approx. 500g
96 x 96 x 100mm(W x H x D)
Base and Case: Flame-resistant resin
Base and Case: Light graySet value lock, SV high/low limit, Sensor correction, Multi-range, Multi function,
Alarm action delay timer, Warm-up display, Wait, Hold, Step progress, Step
regress, Pattern Repeat/Link, Time faster progress, Data clearing, Patternnumber external selection, External operation, Power failure countermeasure,
Fixed value control, Self-diagnosis, Automatic cold junction temperaturecompensation, Sensor burnout function (overscale, underscale) and PV start.
Mounting brackets : 1 set
Instruction manual : 1 copy
Unit label:1
Terminal cover: 2 pieces (When TC option is added.)
Gasket: 1 piece (When IP option is added.)
Auxiliary frame: 1 piece (When IP option is added.)

10.2 Optional specifications
Alarm 2 output [A2 option] (only for PC-935 type)The alarm action point is set by the deviation from the SV (except Process alarm).
When the input goes outside the range, the output turns ON or OFF (in the case of High/Low limit range
alarm).
Alarm type can be selected by internal switches.
When Alarm 2 (A2 option) and Loop break alarm (LA option) are added together, they utilize common
output terminals.
If Alarm 2 (A2 option) is added, the Heating/Cooling control output (DR, DS, DA option) cannot be added.
 No alarm action
 High limit alarm (Deviation setting): Input span* (Off when set to 0)
 Low limit alarm (Deviation setting): Input span* (Off when set to 0)
 High/Low limits alarm (Deviation setting): 0 to input span* (Off when set to 0)
 High/Low limit range alarm (Deviation setting): 0 to input span* (Off when set to 0) Process high alarm: Input range low limit to input range high limit
 Process low alarm: Input range low limit to input range high limit* For DC input, input span is the same as the scaling span.
Standby function
Setting accuracy
ActionHysteresis
OutputSelectable
Within 0.2% of each input span 1digit
ON/OFF action
Thermocouple, RTD input: 0.1 to 100.0 ( )DC input: 1 to 1000 (The placement of the decimal point follows the selection.)
Relay contact, 1a
Control capacity: 3A 250V AC (resistive load)
1A 250V AC (inductive load cos =0.4)

Loop break alarm output [LA option]
Detects heater burnout, sensor burnout or actuator trouble.
When Loop break alarm (LA option) and Alarm 2 (A2 option) are added together, they utilize common
output terminals.
If Loop break alarm (LA option) is added, Heating/Cooling control output (DR, DS, DA option) cannot
be added.
For the PC-955 type, relay contact output is not available. (However, the LA indicator lights.)
107

Loop break alarm time
Loop break alarm span

Output0 to 200 minutes
Thermocouple (except T), RTD input: 0 to 100 ( )With a decimal point: 0.0 to 100.0 ( )DC input: 1 to 1000 (The placement of the decimal point follows theselection.)
Relay contact, 1a
Control capacity: 3A 250V AC (resistive load)
1A 250V AC (inductive load cos =0.4)

Heating/Cooling control output (OUT2) [DR, DS, DA option] (only for PC-935 type)
If Heating/Cooling control output is added, Alarm 2 (A2) or Loop break alarm (LA) cannot be added together.
Heating side: The same as OUT1
Cooling side: PID control
OUT2 proportional band(P) 0.0 to 10.0 times OUT1 proportional band
(ON/OFF control when set to 0.0)
Integral time (I)OUT1 integral time
Derivative time (D)OUT1 derivative time
OUT2 proportional cycle
1 to 120 sec (Not available for the DC current output type)
Overlap band/Dead band
Converted value of OUT1 proportional band
Thermocouple, RTD input: -199.9 to 999.9 ( ), DC input: -1999 to 9999
(The placement of the decimal point follows the selection.)
ON/OFF hysteresis
Thermocouple, RTD input: 0.1 to 100.0 ( ), DC input: 1 to 1000 (Theplacement of the decimal point follows the selection.)
OUT2 high, low limit value 0 to 100% (DC current output type: -5 to 105%)
OUT2 action mode
Air cooling (Linear characteristic)
Oil cooling (1.5th power of the linear characteristic)
Water cooling (2nd power of the linear characteristic)
Control output (OUT2)
Relay contact [DR] : 1a, 3A 250V AC (resistive load)
1A 250V AC (inductive load cos =0.4)+2
Non-contact voltage (for SSR drive) [DS]: 12 0 V DC
Max 40mA (short circuit protected)
DC current [DA]: 4 to 20mA DC (Isolated type)
Load resistance: Max 550
Transmission output [TA, TV option]
Converting the value (PV transmission, SV transmission or MV transmission) to an analog signal every
125ms, this outputs the value in current or voltage.
Transmittable parameter: PV, SV, MV (Selectable by keypad)
Resolution
1/10000
Output signal
DC current (TA): 4 to 20mA DC (load resistance, Maximum 500 )DC voltage (TV): 0 to 1V DC (load resistance, Minimum 100k )Output accuracy
Within 0.3% of Transmission output span
Serial communication [C, C5 option]
The following operations can be executed from an external computer.
 Reading and setting of the SV, PID and various set values.
 Reading of the PV and action status.
 Function change
EIA RS-485 [C5]Communication line
EIA RS-232C [C]
Number of units
RS-232C: 1 unit (Unable to connect in parallel)
connected
RS-485: Max 31 units of PC-900
Communication method
Half-duplex communication
Synchronization method
Start-stop synchronization
Communication speed
2400/4800/9600/19200bps (Selectable by keypad)
Start bit : 1
Data format
Data bit : 7
Parity : Even parity
Stop bit : 1
108

Set value digital transmission [SVTC option]
The SV (desired value) can be transmitted digitally to Shinko controllers FCD or FCR to which the C5
option is added.
Maximum 31 FCD (FCR) units

100
Terminator

YA

11

YA 11

YA 11

YA 11

YB

12

YB 12

YB 12

YB

COM 16

COM 16

COM 16

COM 16

FCD-100
or
FCR-100

FCD-100
or
FCR-100

FCD-100
or
FCR-100

PC-90012(Fig. 10.2-1)

Time signal output [TS option]
Time signal block number (Block number to which signal OFF time and ON time are set) can be set
for each step.
A maximum of 8 channels per step can be outputted.
The time signal output is changeable to status output as shown below.
Time signal output TS1
Time signal output TS2
Time signal output TS3
Time signal output TS4
Time signal output TS5
Number of circuits
OutputCapacity

RUN
HOLD
WAIT
FAST
STOP
8
Open collector
24V DC Max 50mA

Color black [BK option]
Front panel : Dark grayCase
: Black
Terminal cover [TC option]
Electrical shock protection terminal cover
Drip-proof/Dust-proof [IP option]
Drip-proof and Dust-proof specification (IP54)
 Effective only for panel surface, case is excluded.
Please use the front cover (soft type, sold separately)
for comprehensive Drip-proof/Dust-proof protection.
 To protect the controller from water leaks between
the control panel and controller, be sure to take noteof the following.
(1) The panel cutout dimensions should be correctand have no burr(s).
(2) The control panel surface for mounting should bevertical.

Fa

the
ce

be

le
ve

dp

a

he
ot
rt t

pa

n

s
el

ide

.

Up

Down
Auxiliary frame(Fig. 10.2-2)

User specified
 Input range: Shipped with specified input range
 Alarm type: Shipped with specified alarm type (A1, A2, A3, A4)
 OUT2 action mode : Shipped with specified OUT2 action mode (When DR, DS, DA option is added)
 Transmission output : Shipped with specified output (When TA, TV option is added)10911. Troubleshooting
If any malfunctions occur, refer to the following after checking the power and wiring.

Warning
Turn the power supply to the instrument OFF before wiring or checking.
Working on or touching the terminal with the power switched ON may result in severe injury
or death due to electric shock.
Moreover, the instrument must be grounded before the power supply to the instrument isturned on.

[Indication]
Problem: The PV display flashes [Presumed cause Thermocouple or RTD is burnt out].

 Lead wire of the thermocouple or RTD is notsecurely connected to the instrument terminals.
Problem: The PV display flashes [].
Presumed cause Codes (A, B, B) of RTD do not agree with the
instrument terminal.
 Polarity of thermocouple or compensation leadwire is reversed.

Solution Replace the Thermocouple or RTD.
[Thermocouple]
If the input terminal of the instrument is shorted,and if a value around room temperature isindicated, the instrument is likely to be operating
normally, however, the sensor may be burnt out.
[RTD]
If approx. 100 of resistance is connected to the
input terminals A-B on the instrument, andterminals B-B are shorted, and if a value around
0 (32 ) is indicated, the instrument is likely to
be operating normally, however, the sensor may
be burnt out.
 Ensure that the lead wire is securely connectedto the instrument terminals.

Solution Ensure that they are wired correctly.
 Ensure that they are wired correctly.

Problem: Indication on the PV display is irregular or unstable.
Presumed cause
Solution Designation of the sensor input is improper.
 Set the Sensor input properly by the Rotary switch
and DIP switch.
 The temperature unit ( or ) is mistaken.
 Set it to a suitable unit using the DIP switch.
 Sensor correcting value is unsuitable.
 Set it to a suitable value.
 Specification of Thermocouple or RTD does not Use a sensor in accordance with the specificationaccord with that of the instrument.
of the instrument.
 AC leaks into the thermocouple or RTD circuit.
 Use an ungrounded type sensor.
 There may be equipment that interferes with or Keep equipment that interferes with or makes
makes noise near the controller.
noise away from the controller.

110

[Key operation]
Problem: SV, PID values, Proportional cycle and Alarm 1 to Alarm 4, etc. cannot be set.
(Values cannot be changed by theor
key.)Presumed cause
Solution Set value lock is selected.
 Release the lock selection.
 During AT (auto-tuning).
 Cancel AT if necessary.

Problem: Even if theor
key is pressed, the setting indication does not change
within the input range.
Presumed cause
Solution SV high limit or low limit value may be set at
 Set them to suitable values.
the point where the value does not change.

Problem: Program does not start even if the
Presumed cause
 External operation STOP function is working.

key is pressed in the Program mode.
Solution Disconnect terminals 23 and 27.

Problem: Program ends immediately.
Presumed cause
 Step time is not set.

 Set the step time.

Solution

Problem: Step does not proceed.
Presumed cause

Solution Status: HOLD mode.

 Press thecontrol.
 Press thefunction.

 WAIT action is working.

111

key to resume the programor

key to cancel Wait

[Control]
Problem: PV (process variable) does not rise.
Presumed cause Thermocouple or RTD is burnt out Thermocouple or RTD is not securely mounted(inserted) to the control target.

Solution Replace the thermocouple or RTD.
 Securely mount (insert) the Thermocouple or RTD
to the control target.

Problem: PV (process variable) rises too much.
Presumed cause Specification of the Thermocouple or RTD
does not accord with that of the instrument.

Solution Use a sensor in accordance with the specificationof the instrument.

Problem: Fixed value control cannot be performed.
Presumed cause
Solution Program mode has been selected.
 Change the mode to Fixed value control.
Problem: Output remains in an ON status.
Presumed cause
Solution For the Fixed value control, OUT1 low limit value  Set it to a suitable value.
or OUT2 low limit value is set to 100% or higher
in the Output parameter setting mode.
 For the Program control, OUT1 low limit value or  Set it to a suitable value.
OUT2 low limit value is set to 100% or higher in
the Output block data setting mode.
Problem: Output remains in an OFF status.
Presumed cause
Solution For the Fixed value control, OUT1 high limit  Set it to a suitable value.
value or OUT2 high limit value is set to 0% orless in the Output parameter setting mode.
 For the Program control, OUT1 high limit value  Set it to a suitable value.
or OUT2 high limit value is set to 0% or less in
the Output block data setting mode.
For all other malfunctions, please contact our main office or dealers.

11212. Default values[Program control]
Pattern setting mode []PVSetting item
display
Pattern number
Step SV (temperature)
Step time
PID block numberTime signal 1 block numberTime signal 2 block numberTime signal 3 block numberTime signal 4 block numberTime signal 5 block numberTime signal 6 block numberTime signal 7 block numberTime signal 8 block number
Wait block number
Alarm block number
Output block number

0000.00 min.
0
0
0
0
0
0
0
0
0
0
0
0

Block setting mode []PID block [] (PID block number 0)
OUT1 proportional band
Integral time
Derivative time
ARW (Anti-reset windup)
OUT2 proportional band

2.5%
200 sec.
50 sec.
50%
1.0 times

Default value(SV/MV/TIME display)

Time signal block [] (Time signal block number 0)Time signal output OFF time
00.00 min.
Time signal output ON time
00.00 min.
Wait block [] (Wait block number 0)
Wait value0

Alarm block [] (Alarm block number 0)
Alarm 1 (A1) value

Unavailable because default
value is Pattern end 1 output000Alarm 2 (A2) value
Alarm 3 (A3) value
Alarm 4 (A4) value
Output block [] (Output block number 0)
OUT1 high limit value
OUT1 low limit value
OUT2 high limit value
OUT2 low limit value
OUT1 rate-of-change

100%
0%
100%
0%
0%

113

Data

Number of repetitions, Pattern link setting mode [PVSetting item
display
Number of repetitions (Pattern No. 0)
Pattern link (Pattern No.0 and No.1)]
Default value(SV/MV/TIME display)0: Pattern link
Disabled

AT Perform mode []AT modeAT Perform/Cancel: Normal mode
: Cancel

Attached function setting mode [Alarm parameter setting mode [Alarm 3 (A3) type
Alarm 4 (A4) type
Alarm 1 (A1) hysteresis
Alarm 2 (A2) hysteresis
Alarm 3 (A3) hysteresis
Alarm 4 (A4) hysteresis
Alarm 1 (A1) delay timer
Alarm 2 (A2) delay timer
Alarm 3 (A3) delay timer
Alarm 4 (A4) delay timer
Loop break alarm time
Loop break alarm span]]
: High limit alarm: Low limit alarm
1.0
1.0
1.0
1.0
0 sec.
0 sec.
0 sec.
0 sec.
0 min.
0

Output parameter setting mode []OUT1 proportional cycle
OUT1 ON/OFF hysteresis
OUT2 proportional cycle
OUT2 action mode
OUT2 ON/OFF hysteresis
Overlap band/Dead band
Open/Closed output dead band
Open output time
Closed output time
SV high/low limit value setting mode [SV high limit value
SV low limit value

R/M: 30 sec., S/M: 3 sec.
1.0
DR: 30 sec., DS: 3 sec.
: Air cooling
1.0
0.0
3.0%
30.0 sec.
30.0 sec.
]
1370
-200

Transmission output parameter setting mode [Transmission output typeTransmission output high limit value
Transmission output low limit value
Input parameter setting mode [Scaling high limit value
Scaling low limit value
Decimal point place
Sensor correction
PV filter time constant]: PV(process variable)
1370
-200

]
1370
-200
: No decimal point
0.0
0.0 sec.
114

Data

Communication parameter setting mode [PVSetting item
display
Communication speed
Instrument number
Communication mode]
Default value(SV/MV/TIME display): 9600bps
0: Serial
communication

Other functions setting mode []Set value lock
Step SV when program control starts
Program control start type
Status after power is restored
Step time unit
Step time indication type
Step SV indication type

: Unlock
0.0: PV start: Continuation: Minute: Remaining time
:SV corresponding
to the step time progress

Pattern end output time
Step SV Hold function at program end
Time signal output/Status output (RUN)
selection for TS1
Time signal output/Status output (HOLD)
selection for TS2
Time signal output/Status output (WAIT)
selection for TS3
Time signal output/Status output (FAST)
selection for TS4
Time signal output/Status output (STOP)
selection for TS5
Overshoot suppression factor
Output status when input abnormal

Automatic/Manual control switching mode [Automatic/Manual control switching

0 sec.
: Not holding: Time signal output: Time signal output: Time signal output: Time signal output: Time signal output
1.0: Outputs OFF(4mA) or OUT1 (OUT2)
low limit value.

]: Automatic

115

Data

[Fixed value control]
Fixed value control parameter setting mode [SV (desired value) setting mode []PVSetting item
displaySV (desired value)
PID parameter setting mode []OUT1 proportional band
Integral time
Derivative time
ARW (Anti-reset windup)
OUT2 proportional band
Alarm value setting mode [Alarm 1 (A1) value]
Default value(SV/MV/TIME display)0

2.5%
200 sec.
50 sec.
50%
1.0 times]
Unavailable because default
value is Pattern end 1 output000Alarm 2 (A2) value
Alarm 3 (A3) value
Alarm 4 (A4) value
Auto-tuning Perform mode [AT mode]: Normal mode
: Cancel

AT Perform/Cancel
Attached function setting mode [Alarm parameter setting mode [Alarm 3 (A3) type
Alarm 4 (A4) type
Alarm 1 (A1) hysteresis
Alarm 2 (A2) hysteresis
Alarm 3 (A3) hysteresis
Alarm 4 (A4) hysteresis
Alarm 1 (A1) delay timer
Alarm 2 (A2) delay timer
Alarm 3 (A3) delay timer
Alarm 4 (A4) delay timer
Loop break alarm time
Loop break alarm span]]
: High limit alarm: Low limit alarm
1.0
1.0
1.0
1.0
0 sec.
0 sec.
0 sec.
0 sec.
0 min.
0

Output parameter setting mode []OUT1 proportional cycle
OUT1 high limit value
OUT1 low limit value
OUT1 ON/OFF hysteresis
OUT1 rate-of-change
OUT2 proportional cycle
OUT2 action mode
OUT2 high limit value
OUT2 low limit value
OUT2 ON/OFF hysteresis
Overlap band/Dead band
Open/Closed output dead band
Open output time
Closed output time

R/M: 30 sec., S/M: 3 sec.
100%
0%
1.0
0%
DR: 30 sec., DS: 3 sec.
: Air cooling
100%
0%
1.0
0.0
3.0%
30.0 sec.
30.0 sec.
116

Data

SV high/low limit setting mode []PVSetting item
display
SV high limit value
SV low limit value

Default value(SV/MV/TIME display)
1370
-200

Transmission output parameter setting mode [Transmission output typeTransmission output high limit value
Transmission output low limit value
Input parameter setting mode [Scaling high limit value
Scaling low limit value
Decimal point place
Sensor correction
PV filter time constant

]
: PV
1370
-200

]
1370
-200
: No decimal point
0.0
0.0 sec.

Communication parameter setting mode [Communication speed
Instrument number
Communication mode]
: 9600bps
0: Serial
communication

Other functions setting mode []Set value lock
Output status when input abnormal: Unlock: Outputs OFF(4mA) or OUT1 (OUT2)
low limit value.

Automatic/Manual control switching mode [Automatic/Manual control switching]: Automatic

117

Data

Index 1 (Program control)[Program pattern setting mode]

Page

Pattern number
Step SV
Step time
PID block numberTime signal block number (1 to 8)
Wait block number
Alarm block number
Output block number

23
23
23
23
23
24
24
24

[Block setting mode]
PID block data setting
OUT1 proportional band
Integral time
Derivative time
ARW (Anti-reset windup)
OUT2 proportional band
Time signal block data setting
Time signal output OFF time
Time signal output ON time
Wait block data setting
Wait value
Alarm block data setting
Alarm 1 (A1) value
Alarm 2 (A2) value
Alarm 3 (A3) value
Alarm 4 (A4) value
Output block data setting
OUT1 high limit value
OUT1 low limit value
OUT2 high limit value
OUT2 low limit value
OUT1 rate-of-change

27
28
28
28
28
30
30
33
36
36
36
36
39
39
39
39
40

[Number of repetitions, Pattern link setting mode]
Number of repetitions
Pattern link42
42

[AT (Auto-tuning) Perform mode]
AT modeAT Perform/Cancel

90
91

118

[Attached function setting mode]
Alarm parameter setting
Alarm 3 (A3) type
Alarm 4 (A4) type
Alarm 1 to 4 (A1 to A4) hysteresis
Alarm 1 to 4 (A1 to A4) delay timer
Loop break alarm time
Loop break alarm span
Output parameter setting
OUT1 proportional cycle
OUT1 ON/OFF hysteresis
OUT2 proportional cycle
OUT2 action mode
OUT2 ON/OFF hysteresis
Overlap band/Dead band
Open/Closed output dead band
Open output time
Closed output time
SV high/low limit value setting
SV high limit value
SV low limit value
Transmission output parameter setting
Transmission output typeTransmission output high limit value
Transmission output low limit value
Input parameter setting
Scaling high limit value
Scaling low limit value
Decimal point place
Sensor correction
PV filter time constantCommunication parameter setting
Communication speed
Instrument number
Communication mode
Other functions setting
Set value lock
Step SV when program control starts
Program control start type
Status after power is restored
Step time unit
Step time indication type
Step SV indication type
Pattern end output time
Step SV Hold function at program end
Time signal output/Status output (RUN)
for TS1Time signal output/Status output (HOLD)
for TS2Time signal output/Status output (WAIT)
for TS3Time signal output/Status output (FAST)
for TS4Time signal output/Status output (STOP)
for TS5
Overshoot suppression factor
Output status when input abnormal

Page
44
45
45
46
47
47
49
50
50
50
51
51
52
52
52
55
55
57
57
58
60
60
61
61
61
64
64
65
67
67
67
68
68
69
69
69
70
70
71
71
72
72
73
73

[Auto/Manual control switching mode]
Auto/Manual control switching86
119Index 2 (Fixed value control)[Fixed value control parameter setting mode]SV (desired value) settingSV
PID parameter setting
OUT1 proportional band
Integral time
Derivative time
ARW (Anti-reset windup)
OUT2 proportional band
Alarm value setting
Alarm 1 (A1) value
Alarm 2 (A2) value
Alarm 3 (A3) value
Alarm 4 (A4) value[Auto-tuning Perform mode]
AT modeAT Perform/Cancel

Page
75
76
76
77
77
77
78
79
79
79
90
91

[Attached function setting mode]
Alarm parameter setting
Alarm 3 (A3) type
Alarm 4 (A4) type
Alarm 1 to 4 (A1 to A4) hysteresis
Alarm 1 to 4 (A1 to A4) delay timer
Loop break alarm time
Loop break alarm span
Output parameter setting
OUT1 proportional cycle
OUT1 high limit value
OUT1 low limit value
OUT1 ON/OFF hysteresis
OUT1 rate-of-change
OUT2 proportional cycle
OUT2 action mode
OUT2 high limit value
OUT2 low limit value
OUT2 ON/OFF hysteresis
Overlap band/Dead band
Open/Closed output dead band
Open output time
Closed output time
SV high/low limit setting
SV high limit value
SV low limit value
Transmission output parameter setting
Transmission output typeTransmission output high limit value
Transmission output low limit value
Input parameter setting
Scaling high limit value
Scaling low limit value
Decimal point place
Sensor correction
PV filter time constantCommunication parameter setting
Communication speed
Instrument number
Communication mode
Other functions setting
Set value lock
Output status when input abnormal

44
45
45
46
47
47
49
49
49
50
50
50
50
51
51
51
51
52
52
52
55
55
57
57
58
60
60
61
61
61
64
64
65
67
73

[Auto/Manual control switching mode]
Auto/Manual control switching86
120

Program pattern graphing
Make a Program pattern and Data table before setting the Program.
Copy the Program pattern table (p.126) and graph the pattern by following procedures.
 Write down the SV on Y axis including the highest and lowest temperature.
 From Step 0, write down the step SV, step time and block number data such as PID, Time signal 1 to 8,
Wait, Alarm and Output in sequence.
(Write down the block number for each step even if the same number is used.) Draw a line graph of the step SV.
Explanation of the Program pattern table
Program pattern table consists of Y axis which represents the step SV (represents the step time (Hour:Minute or Minute:Second).
Vertical (Y) axis
: SV ( or )Horizontal (X) axis : Step time (Hour:Minute or Minute:Second) Step SV is considered to be the value at the end of the step.
 Step time is considered to be the step process time.

or) and X axis which

The relation between the step SV and Step time can be explained as follows. (Refer to p.122)
Step 0: The control is performed so that the temperature reaches 500 in 30 minutes (0:30). (*1)
Step 1: The control is performed at 500 for 1 hour (1:00).
(*1) If the SV start is selected during the Program control start type selection, the control starts from SV.
If the PV or PVr start is selected during the Program control start type selection, the SV is advanced
to the PV and the control starts.
<PID block>
Consists of OUT1 proportional band (P), Integral time (I), Derivative time (D) and OUT2 proportionalband (P) (*3) (10 block numbers from 0 to 9 can be set).
<Time signal block>
Consists of Time signal output OFF time and Time signal output ON time.
16 types of Time signal block (Block numbers from 0 to 15) can be set to Time signal 1 to 8 (TS1 toTS8) respectively (*2).
(*2): Time signal 1 to 5 (TS1 to TS5) can be set only when Time signal output is selected during
Time signal output/Status output section (when TS option is applied) (pages 70 to 72).
<Wait block>Wait block for block number 0 to 9 can be set.
<Alarm block>
Consists of Alarm 1 value, Alarm 2 value (only when A2 option is added), Alarm 3 value andAlarm 4 value.
Alarm block for block number 0 to 9 can be set.
<Output block>
Consists of OUT1 high limit, OUT1 low limit, OUT2 high limit (*3), OUT2 low limit (*3) and OUT1
rate-of-change.
10 types of Output block (Block number from 0 to 9) can be set.
Output block for block number 0 to 9 can be set.
(*3): Only when the DR, DS or DA option is added.

121

Program pattern graphing example

Program pattern (Pattern number 0)
Step number
0

1

2

3

4

500
0:30
1
0

500
1:00
1
1

1000
0:40
2
0

1000
1:00
2
1

0
2:00
1
0

2

2

2

2

2

1

2

1

2

0

1

1

1

1

0

0

0

0

0

1

1

0

1

0

1

2

0

2

0

2

0

0

0

0

2

1
1
0

0
2
1

1
1
0

0
2
1

0
1
0

1000

SV
500

C

0
Step SV ( C )Step time (Hour:Min)
PID block number*

TS 1 block number*

TS 2 block number*
TS 3 block number*

TS 4 block number*

TS 5 block number*

TS 6 block number*

TS 7 block number

TS 8 block number*
Wait block number
Alarm block number
Output block number

ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF

Even though the step intervals are shown to be equal length on the sheet, the actual
length will depend on the step time.
* These items are indicated when TS option is added.

122

Data table making
Copy the Data table (Pages 123 to 127) and make your own table by following procedures.
 Write down block data such as PID, Time signal 1 to 8 (TS option), Wait, Alarm and Output for blocknumbers as required.
 Write down other setting items as required.
Data table example[PID block]
OUT1
No.
proportional band
0
2.5%
1
2.0%
2
1.8%

Integral time

Derivative time

(ARW)

200sec.
180sec.
80sec.

50sec.
30sec.
20sec.

50%
40%
60%[Wait block][Time signal block (TS option)]
Output OFF time
Output ON timeNo.
(Hour:Minute)(Hour:Minute)
0
0:00
0:00
1
0:20
0:30
2
0:00
0:30
[Alarm block]
Alarm 1 (A1) value
No.
(Pattern end output)012[Output block]
OUT1
No.
high limit
0
100%
1
100%
2
80%

Wait value

No.
0
1
2

Alarm 2 (A2) value(Process alarm)
1370
1370
1370

OUT1
low limit
0%
10%
0%

0 (OFF)
105

Alarm 3 (A3) value(High limit alarm)
0 (OFF)
105

OUT2high limit
100%
100%
80%

OUT2
low limit
0%
10%
0%

 Proportional cycle: 15 seconds
 Number of repetitions:1
 Pattern link
: Pattern link Disabled Communication speed: 9600bps
 Communication instrument number: 1
 Overshoot suppression factor: 1.0[Fixed value control parameter]
 SV (desired value)[ OUT1 proportional band [ Integral time[ Derivative time
[
 ARW
[
 OUT2 proportional band [ Alarm 1 (A1) value[ Alarm 2 (A2) value[ Alarm 3 (A3) value[ Alarm 4 (A4) value[

OUT2
proportional band
2.5%
2.0%
1.8%

]: 1000]: 2.0%]: 180 seconds]: 30 seconds]: 50%]: 2.0% (When multiplying factor is 1.0)]: Pattern end output]: 1370 (Process alarm)]: 10 (High limit alarm)]: 10 (Low limit alarm)

123

Alarm 4 (A4) value(Low limit alarm)
0 (OFF)
105

OUT1
rate-of-change
0%/sec10%/sec
0%/secData and Program pattern table[PID block]
No.
0
1
2
3
4
5
6
7
8
9

OUT1
proportional band
%
%
%
%
%
%
%
%
%
%

Integral time

Derivative time

sec.
sec.
sec.
sec.
sec.
sec.
sec.
sec.
sec.
sec.

sec.
sec.
sec.
sec.
sec.
sec.
sec.
sec.
sec.
sec.

[Time signal block (TS option)]
Output OFF time
Output ON time
No.
(
:
)
(
:
)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

OUT2
proportional band

ARW
%
%
%
%
%
%
%
%
%
%

[Wait block]
No.
0
1
2
3
4
5
6
7
8
9

124

Wait value

%
%
%
%
%
%
%
%
%
%

[Alarm block]
No.
0
1
2
3
4
5
6
7
8
9

Alarm 1 (A1) value()[Output block]
OUT1
No.
high limit
0
1
2
3
4
5
6
7
8
9

Alarm 2 (A2) value
(
)

OUT1
low limit
%
%
%
%
%
%
%
%
%
%

 Proportional cycle:
 Number of repetitions:
 Pattern link: Communication speed:
 Communication instrument number: Overshoot suppression factor:

Alarm 3 (A3) value
(
)

OUT2
high limit
%
%
%
%
%
%
%
%
%
%
sec.

bps

Alarm 4 (A4) value
(
)

OUT2
low limit
%
%
%
%
%
%
%
%
%
%

%
%
%
%
%
%
%
%
%
%

[Fixed value control parameter]
 SV (Desired value)[ OUT1 proportional band [ Integral time[ Derivative time
[
 ARW
[
 OUT2 proportional band [ Alarm (A1) value[ Alarm (A2) value[ Alarm (A3) value[ Alarm (A4) value
[

125

OUT1
rate-of-change%/sec.
%/sec.
%/sec.
%/sec.
%/sec.
%/sec.
%/sec.
%/sec.
%/sec.
%/sec.

]:
]:
]:
]:
]:
]:
]:
]:
]:
]:

%
sec.
sec.
%
%

Program pattern (Pattern number0

Step number)1

SV ( Desired value )Step SV ( C )Step time (: )PID block number
TS 1 block numberON
OFF

TS 2 block number

ON
OFF

TS 3 block number

ON
OFF

TS 4 block number

ON
OFF

TS 5 block numberON
OFF

TS 6 block numberON
OFF

TS 7 block numberON
OFF

TS 8 block number

ON
OFF

Wait block number
Alarm block number
Output block number

126

2

3

4

5

6

7

Program pattern (Pattern number
Step number89)

SV (Desired value)

Step SV ( C )Step time ( : )PID block number
ON TS 1 block number
OFF
ON TS 2 block number
OFF
ON TS 3 block number
OFF
ON TS 4 block number
OFF
ON TS 5 block number
OFF
ON TS 6 block number
OFF
ON TS 7 block number
OFF
ON TS 8 block number
OFF
Wait block number
Alarm block number
Output block number

127 Inquiries For any inquiry about this controller, please contact our agency or thevendor where you purchased the unit after checking the following.
(Example) Model ------------------------------ PC-935-R/M
 Input type ------------------------- K Option ----------------------------- A2, TS
 Serial number ------------------- No. xxxxxxx
In addition to the above, please let us know the details of the malfunction,or discrepancy, and the operating conditions.

SHINKO TECHNOS CO., LTD.
OVERSEAS DIVISION

Head Office:URL:
E-mail:2-5-1, Senbahigashi, Minoo, Osaka, Japan
http://www.shinko-technos.co.jp
Tel : +81-72-727-6100
overseas@shinko-technos.co.jp
Fax: +81-72-727-7006
No.PC91E8 2014.11