AD-4408C
Weighing Indicator
INSTRUCTION MANUAL

1WMPD4001849AWARNING DEFINITIONS
The warnings described in this manual have the following meanings:
A potentially hazardous situation which, if not avoided, could result indeath or serious injury.
A potentially hazardous situation which, if not avoided, may result inminor or moderate injury or damage to the instrument.
This symbol indicates caution against electrical shock. Do not touch
the part where the symbol is placed.

This symbol indicates the ground terminal.

This symbol indicates that an operation is prohibited.

NOTE

Information or cautions to use the device correctly.

© 2012 A&D Company Ltd. All rights reserved.
No part of this publication may be reproduced, transmitted, transcribed, or translated into any
language in any form by any means without the written permission of A&D Company Ltd.

The contents of this manual and the specifications of the instrument covered by this manual are
subject to change for improvement without notice.

Contents
1.

Safety Precautions .......................................................................................................32.

Introduction...................................................................................................................4

3.

Specifications ...............................................................................................................5
3.1. Analog Section ....................................................................................................5
3.2. Digital Section .....................................................................................................5
3.3. General ...............................................................................................................6

4.

Description of Each Part ...............................................................................................8
4.1. Front Panel .........................................................................................................8
4.2. Rear Panel ........................................................................................................10

5.

Installation ..................................................................................................................125.1. Precautions .......................................................................................................125.2. Load Cell Cable Type........................................................................................135.3. Shield Connection .............................................................................................135.4. Load Cell Connection........................................................................................145.5. Checking the Load Cell Connection ..................................................................15

6.

Operation....................................................................................................................16
6.1. General Function...............................................................................................16
6.2. Mode Map .........................................................................................................19

7.

Calibration ..................................................................................................................20
7.1. General Description ..........................................................................................20
7.2. Calibration With an Actual Load (Cal5et).........................................................21
7.3. Calibration-Related Functions (Calf)................................................................23
7.4. Calibration Errors ..............................................................................................29
7.5. Load Cell Output Adjustment ............................................................................30

8.

General Functions ......................................................................................................318.1. Setting Procedure .............................................................................................318.2. Adjusting the Digital Filter .................................................................................32
8.2. Basic Functions (fncf) .....................................................................................33
8.3. Standard Serial Output (Cl f) ..........................................................................34
8.4. CC-Link (CC f)..................................................................................................34

9.

Interface......................................................................................................................35
9.1. Standard Serial Output......................................................................................35
9.2. CC-Link .............................................................................................................37

10. Maintenance ...............................................................................................................50
10.1. Error Messages...............................................................................................50
10.2. Check Mode ....................................................................................................50
10.3. Initialization Mode ...........................................................................................54
10.4. Checking the Load Cell Connection Using the Digital Multimeter ...................56
Page 1AD-4408C Weighing Indicator11. Setting List..................................................................................................................58
11.1. Basic Functions...............................................................................................58
11.2. Standard Serial Output....................................................................................59
11.3. CC-Link ...........................................................................................................59
11.4. Calibration-Related Functions .........................................................................60
12. External Dimensions...................................................................................................62

AD-4408C Weighing Indicator

Page 2

1. Safety Precautions
For safe and correct usage, read the following precautions carefully before using theindicator.
Grounding
Earth ground the indicator by connecting the ground terminal located on the rear panel tothe earth, to prevent a fire, electrical shock or indicator malfunction.
Do not share the ground line with other electrical power equipment.
Appropriate power cable
Use a power cable appropriate to the supply voltage and current used. Using an
inappropriate cable may cause electrical leakage or a fire.
Connect the power cable to the terminals firmly using compression lugs.
Fuse replacement
A fuse is provided to protect against a fire hazard.
The indicator is equipped with various protection circuits and the fuse rarely burns out
under normal operations.
If the fuse burns out, the internal circuits may have been damaged by surges. Do not try toreplace the fuse. Contact the nearest A&D dealer.
Avoid water and moisture
The indicator is not water-resistant.
Securing the front panel to the control panel using the accessory panel mount packing will
provide the indicator the IP-65 protection.
Avoid an environment with flammable gases.
Do not use the indicator in places where flammable gases are present.
Indicator overheat
To prevent the indicator from overheating, allow appropriate clearance between the
peripheral devices.
If the ambient temperature exceeds the specified operating temperature, use a fan to cool
the environment.

Page 3AD-4408C Weighing Indicator2. Introduction
The AD-4408C is a weighing indicator that amplifies signals from a load cell,converts it to digital data and displays it as a mass value.
The accessory panel mount packing will provide the indicator the IP-65 protection.
This indicator has the following performance:
Input sensitivity: ......................... 0.15 μV /d
Display resolution: ..................... 999,999 d max.
Sampling rate:............................ 100 times/second
Input voltage range: ................... -35 mV to +35 mV (-7 mV/V to +7 mV/V)
Digital span mode:
Keying in the load cell output voltage (mV/V) allows calibration to be performed
without an actual load.
CC-Link interface:
A CC-Link interface, provided as standard equipment, allows construction of aweighing system easily on a CC-Link network.
NOTE: The AD-4408C CC-Link is a remote device station.
By switching the number of occupied stations (for example 1, 2 or 4), up to
42 indicators can be connected to one master device when only AD-4408Cs
are used.
The unit, d indicates a minimum division.

AD-4408C Weighing Indicator

Page 4

3. Specifications
3.1.

Analog Section

Input sensitivity
Input voltage range
Zero adjustment range
Load cell excitation voltage
Load cell drive capacity
Temperature Zerocoefficient Span
Non-Linearity
A/D conversion method
A/D resolution countDisplay resolution
Sampling rate

3.2.

0.15 μV/d or greater-35 mV to +35 mV (-7 mV/V to +7 mV/V)-35 mV to +35 mV (-7 mV/V to +7 mV/V)
5VDC 5%, 120 mA with remote sensing capability
Maximum 8 x 350 Ω load cells
0.02 μV /°C typ., 0.1 μV /°C max.
3ppm /°C typ., 15ppm /°C max.
0.005 % of full scale
Delta-sigma method
Approximately 16,000,000 counts
999,999 d max.
100 times/second

Digital Section

Display element

Measurement display

Status indicators
Key switches• Measurement display: 6-digit 7-segment green LED• Character height: 14.6 mm• Polarity display: 1 green LED• Status indicator: 6 red LEDs
• Switches between NET and GROSS• Selectable decimal places (101, 102, 103, 104, 105)
• Overflow display
All the digits turn OFF. (When the polarity is negative, theminus sign appears at the highest-order digit.)
ZERO, STABLE, GROSS, NET, HOLD,
ZERO, TARE, NET/GROSS, F, ON/OFF, ENTER, CAL

Page 5

AD-4408C Weighing Indicator3.3.

General3.3.1. Interface
Standard serial output
CC-Link interface

Output for communication with A&D peripheral devices (20mA current loop)
CC-Link ver.1.10 remote device station

3.3.2. Measuring functions

Zero adjustment

Zero tracking

TareStability detection

Digital filter

AD-4408C Weighing Indicator• Sets the gross weight to zero by pressing the ZERO key ora command from the CC-Link master station.
• Selection of disable or enable for the operation when
unstable.
• The zero value is battery backed up.
• Zero adjustable range
Can be set optionally in the range of 1 to 100% of theweighing capacity.
• Tracks the weight drift around the zero point to maintainzero.
• Zero tracking time
0.0 to 5.0 seconds (Can be set optionally within the range.)• Zero tracking band
0.0 to 9.9 d (Can be set optionally within the range.)• Sets the net weight to zero by pressing the TARE key or acommand from the CC-Link master station.
• Selection of disable or enable for the operation when
unstable or negative.
• The tare weight is battery backed up.
• Tare range: Gross weight ≤ Weighing capacity• Turns ON the stabilization indicator when the variables of
the weight values per sampling are within the set band in
the set time.
• Stability can be confirmed using the CC-Link.
• Stability detection time
0.0 to 9.9 seconds (Can be set optionally within the range.)• Stability detection band
0 to 9 d (Can be set optionally within the range.)
Cutoff frequency range: 0.07 to 11 Hz

Page 6

3.3.3. Other

Power source
Power consumption
Operating temperature
Operating humidity
Installation method
Mass• Zero value and tare weight
Memory backup by lithium battery. (Approx. 10 years)• Calibration data and function data
Written into the EEPROM
100 VAC to 240 VAC, +10%, -15%, (50/60 Hz)
Approximately 10 VA-10°C to +40°C
85% R.H. or less (no condensation)
Panel mount
Approximately 800 g

3.3.4. Accessories
Item
CC-Link connector
Connector operation lever
Weighing capacity plate
Unit label
Panel mount packing
Terminal block cover

Quantity
1
1
1
1
1
1

Data backup

Model name
1TM-721-105/037A
1TM-231-131
108-4023453
108-4023456
106-4004213
107-4005384

Page 7

AD-4408C Weighing Indicator4. Description of Each Part
4.1.

Front Panel

Fig.1 Front panel

DisplaysNo.
Name
1 Main display
2 ZERO
3

STABLE

4
5

GROSS
NET

6

HOLD

7
8

UNIT

9

Capacity plate

10 CAL

Description
Displays the weight value, setting values, error messages, etc.
Turns ON when the weight value is in the center of zero.
• Turns ON when the weight value is stable.
• The stability conditions can be changed in the calibration-related
functions.
Turns ON when the displayed value is a gross weight.
Turns ON when the displayed value is a net weight.
• Turns ON when the weight value is being held.
• Two hold modes can be selected in the general functions, either
normal hold or peak hold.
The function for this indicator can be selected in the general functions,depending on the purpose.
• Place a unit label.
• A unit used for weighing is set in the calibration-related functions.
Place a weighing capacity plate.
• The key to enter the calibration mode.
• The key is concealed by a sealable cover.
To avoid unintentional operations, keep the cover attachedexcept when entering the calibration mode.

AD-4408C Weighing Indicator

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Key switches
No.
Name

ON/OFF
ESC

11

12

ENTER

Net/B/GNET GROSS

15

TARE

16

ZERO

17 Seal• The key to proceed to the selected mode.
• Confirms the setting value and stores the data when pressed
after a setting is changed.
• The function for this key can be selected in the generalfunctions, from the list below:
None
Manual print command
Hold
Alternate switch
Momentary switch
Clear the tare weight
Clear the zero value• The key decreases the value of the blinking digit by one when
the numerical values are being entered.

13

14

Description• The key to turn the indicator ON (Weighing mode) and OFF (OFFmode).
• To turn the indicator OFF (OFF mode), press and hold the key
for three seconds or more.
• When OFF, all of the displays and external output/input devices
are turned OFF, but a decimal point located at the right side of
the main display remains ON.
• The key functions as an ESC key when the numerical values
are being entered.

• The key to switch between the gross weight and the net weight.
• The key increases the value of the blinking digit by one when
the numerical values are being entered.
• The key to perform tare.
• The tare conditions are set in the calibration-related functions.
• The key shifts the position of the blinking digit to the right when
the numerical values are being entered.
• In the OFF mode, pressing the ON/OFF key while holding down
the TARE key will clear the zero value and the tare weight.
• The key to zero the current display.
• The zero conditions are set in the calibration-related functions.
• The key shifts the position of the blinking digit to the left when
the numerical values are being entered.
• Can be sealed using a wire seal.

Page 9AD-4408C Weighing Indicator4.2.

Rear Panel
2

3

4

1
Fig.2 Rear panel

No.
1
2
3
4

Name
Terminal block
CC-Link connector
CC-Link status LEDs
Testing terminal

1 Terminal block
Terminal No.
1
EXC+
2
SEN+
3
SEN4
EXC5
SIG+
6
SIG7
SHLD
8
C.L.
9
C.L.
10
F.G.
11
12
13

Description
See the detailed description below.
See the detailed description on the next page.
Leave this terminal unconnected.

Function
Load cell excitation voltage (+)
Sensing input (+)
Sensing input (-)
Load cell excitation voltage (-)
Load cell input (+)
Load cell input (-)
ShieldStandard serial output (Current loop)
Standard serial output (Current loop)
Frame ground
Earth groundAC power source
AC power source

Load cellconnection

NOTE: Terminals 7 (SHLD) and 11 (E) are internally connected.
To avoid unintentional operations, keep the cover attached on the terminal block.
Screw size: M3, tightening torque: 0.5Nxm
AD-4408C Weighing Indicator

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3 CC-Link status LEDs
LED

ON

RUN

NormalSD
RD

Transmitting
Receiving• Setting error• CRC error• Station trouble

ERR

OFF
• Resetting• No signal

NormalBlinking

When a setting
value is changed.

.

Page 11

AD-4408C Weighing Indicator5. Installation
The weighing indicator is a precision electronic instrument. Handle it
carefully.

5.1.

Precautions

5.1.1. Environment
The operating temperature is -10°C to +40°C.
Do not install the indicator in direct sunlight.
The indictor is not water-resistant. When used in an environment where theindicator may be exposed to splashing water, secure the front panel to the control
panel using the accessory panel mount packing. It makes the front panel
water-resistant equivalent to IP-65.

Panel mount packing

Guide rail

Control panel

Washer Screw

Fig.3 Panel mounting method

AD-4408C Weighing Indicator

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5.1.2. Power source
Earth ground the indicator to prevent electrical shock orindicator malfunction.
Before connecting the indicator to the power source, read the instruction manual
thoroughly.
Do not connect the indicator to the power source before the installation is complete.
To avoid electrical shock, do not handle the power cable with a wet hand.
Earth ground the indicator. Do not share the ground line with other electrical power
equipment.
The power requirement is 100 VAC to 240 VAC and the frequency is 50 Hz or 60 Hz.
Use a stable power source free from instantaneous power failure or noise.
To avoid a malfunction, do not share the power line with other devices.
The output voltage of a load cell is a very sensitive signal. Keep all electrical noise
sources away from the load cell and load cell cable.
Use shielded I/O cables. Connect the cable shield to the F.G. terminal or theindicator housing.

5.2.

Load Cell Cable Type

Load cell cables should have high insulation and shielding performance.
Use shielded cables with the insulator that is made of materials with high insulation
resistance such as Teflon® and polyethylene.
NOTE: Teflon is a registered trademark of DuPont.

5.3.

Shield Connection

Connect the load cell shield wire only to the shield terminal (terminal 7 of the terminal
block located on the rear panel) of the AD-4408C.
No ground is connected between the load cell and the AD-4408C. This is to prevent the
ground loop generated by multiple ground points. Gound loop can be a major cause ofnoise and interference.

Page 13

AD-4408C Weighing Indicator5.4.

Load Cell Connection

Two types of load cell connection are available: 6-wire connection and 4-wireconnection.
For high precision and stable weighing, 6-wire connection is recommended.

(A) 6-wire connection(B) 4-wire connection
Fig.4 Load cell connection

AD-4408C Weighing Indicator

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Type

Advantages
The error is smalleven when the loadcell cable is
6-wire connection
extended, a thin load(recommended)
cell cable is used, or
multiple load cells
are used.

Disadvantages

Use a 6-wireshielded cableComplicated wiringwhen a summingbox is used.
The influence ofthe load cell cable
resistance worsens
the temperature
coefficient.
Prone to the
influence of thecontact resistanceof the connector

4-wire connection Simple wiring

Description

The error
increases when
the load cell cableis extended or
multiple load cells
are used.

Precautions on performing the 4-wire connection
Be sure to connect terminals 1 and 2 (EXC+ and SEN+) and terminals 3 and 4(SEN- and EXC-).
If the cable needs extending, use a cable with as large a cross-sectional area as
possible or keep the cable as short as possible.

5.5.

Checking the Load Cell Connection

When the load cell connection is complete, follow the procedure below to check theconnection.
Step 1 Perform a visual check to ensure that the wiring is correct.
Step 2 Turn the AD-4408C ON.
All the digits may be OFF before calibration. Even under such a condition, thecheck mode can be used.
Step 3 Enter the check mode and check the load cell output value.
Refer to “10.2.1. Entering the check mode” to enter the A/D check mode.
Step 4 Confirm that the displayed load cell output value matches the specified value.
Normally the displayed value will be the load cell rated output value or less.
Step 5 If an error occurs, refer to “10.4. Checking the Load Cell Connection Using theDigital Multimeter” to check the connection.
Page 15

AD-4408C Weighing Indicator6. Operation
6.1.

General Function

6.1.1. Zero adjustment
Zero adjustment is a function to set the gross weight to zero. It is performed bypressing the ZERO key or by a command from the CC-Link master station.
The zero adjustment range is set in Calf05 (zero adjustment range) and isexpressed in percent of the weighing capacity with the calibration zero point as thecenter.
Zero adjustment is disabled, even within the zero adjustment range, when the A/D
converter overflow occurs.
A ZERO error is output if zero adjustment is not performed.
The zero value is stored in the battery backup RAM and is maintained, even if thepower is disconnected.
Clearing the zero value is performed using the F key assigned to clear the zero
value. Alternately, apply power to the indicator while holding down the TARE key, or with
the indicator in the OFF mode, press and hold the TARE key and press the ON/OFF key,
to clear the zero value.
Functions related to zero adjustmentz Calf05: Changes the zero adjustment range. (0 to 100%)z Calf10: Enables or disables zero adjustment when unstable.
z Calf16: Enables or disables power-ON zero (function to zero upon power-ON).
6.1.2. Zero tracking
Zero tracking is a function to track the weight drift around the zero point to maintainzero.
The zero tracking time is set in Calf06 (zero tracking time) and the zero tracking
band is set in Calf07 (zero tracking band). When the weight drift is within thespecified ranges, zero tracking is performed automatically.
A ZERO error is not output even if zero tracking is not performed.
Functions related to zero trackingz Calf06: Changes the zero tracking time. (0.0 to 5.0 seconds)z Calf07: Changes the zero tracking band. (0.0 to 9.9 d)AD-4408C Weighing Indicator

Page 16

6.1.3. Tare
Tare is a function to store the gross weight as the tare value and set the net weight tozero.
The tare weight is stored in the battery backup RAM and is maintained, even if thepower is disconnected.
Clearing the tare weight is performed using the F key assigned to clear the tare weight.
Alternately, apply power to the indicator while holding down the TARE key, or with the indicator in
the OFF mode, press and hold the TARE key and press the ON/OFF key, to clear the tare weight.
Functions related to tarez Calf10: Enables or disables tare when unstable.
z Calf11: Enables or disables tare when the gross weight is negative.
6.1.4. F key
Assign a function to the F key in the general functions.
Functions related to the F key
zfncf02: Assigns a function to the F key from the functions below:
0: None1: Manual print command
2: Hold
3: Alternate switch (Read the description below.)
4: Momentary switch (Read the description below.)
5: Clear the tare weight
6: Clear the zero value
zCalf15: Enables or disables clearing the zero value.
zCalf20: Enables or disables the print command when the gross weight is negative.
Alternate switch and momentary switch
zBy assigning these switches to the F key, the ON/OFF status of the F key can betransmitted to the CC-Link master station. This is useful when building a CC-Link
network or performing maintenance.
zIn the case that the station number is 1 and the number of occupied stations is 4, theON/OFF status is transmitted to RX006F of the address map (In sync with display) . (ON: 1, OFF: 0)zThese switches perform as below:
Alternate switch
Press the switch once and release the switch to turn ON or OFF.
Press the switch again to turn OFF or ON.
Momentary switch
Only when the switch is being pressed, the F key is ON. When released, OFF.
Page 17

AD-4408C Weighing Indicator6.1.5.  display
Assign a function to the  display in the general functions.
Functions related to the  display
zfncf04: Assigns a function to the  display from the functions below:
0: None
1: Zero tracking in progress
2: Alarm (Zero range setting error, over, low battery)
3: F key status (Read the description below.)
F key statuszEnables when alternate switch or momentary switch is selected for fncf02.
The display turns ON when the F key is ON and turns OFF when the F key is OFF.
6.1.6. Memory backup
The indicator has two kinds of memory.
EEPROM
Memory used to store important data, without power
supplied, that the occurrence of re-writing is seldom.
Data example: Calibration data, Function data
Battery backup RAM

Memory backup
Data
Calibration data
Function data
Zero value
Tare weightAD-4408C Weighing Indicator

Memory used to store temporary data that the occurrenceof re-writing is often.
Data example: Zero value, Tare weight

MethodDescription

EEPROM

Maintained regardless of battery condition.

Battery
backup RAM

The life of the battery is approximately 10 years
at 25°C with the power disconnected.

Page 18

6.2.

Mode Map

The indicator has several modes to perform various operations.
Perform mode switching by key operation as shown below, only in the direction of thesolid arrow.
After setting a mode, the indicator resets automatically. Alternately, the indicator resets,
when the power is disconnected.
Automatic reset after setting

Power ON
Weighing
mode
Switch using
the ON/OFF key

See the note
below.

OFF
mode

NOTE: When the power isdisconnected with OFF
mode, the indicator
starts with OFF mode
upon power-ON again.

Generalfunction modeEnter using the key combination
ENTER + F

Initialization
mode

MaintenancemodeEnter using the key combinations
ENTER + F
and thenZERO + ENTER
Calibration
mode

Check
mode

Calibration using
an actual load
Calibration-related
function modeEnter using the CAL key
All data
initialization mode
Fig.5 Mode map

Page 19

AD-4408C Weighing Indicator7. Calibration
7.1.

General Description

In the calibration mode, the operation to relate the output voltage from a load cell to themass value and other operations directly related to weighing are performed.

Calibration with anactual load

Calibration-related
function

Digital span

All data initialization

Calibration is performed using a calibration weight.
• Zero calibration: Adjusts the indicator so that themeasured value will be zero when noload is applied to the load cell.
• Span calibration: Enter the calibration weight value andplace the calibration weight on the loadcell.
When the indicator enters the mode of calibration with anactual load, the tare weight and the zero value will be
automatically cleared.
Setting basic constant values of the indicator such as theminimum division and weighing capacity and other data
directly related to weighing is performed.
Setting the parameters for digital span calibration is also
performed.
Calibration is performed without an actual load, by keying in
the load cell output voltage (mV/V).
• Input voltage at zero: Key in the load cell output at zero.
• Input voltage at span: Key in the load cell output at span.
(Load cell output at full capacity – load cell output at zero)• Calibration weight value at span:
Key in the calibration weight value
corresponding to the input voltage at
span.
(The input voltage at span is related to the mass value.)
Clears all the data in the EEPROM and battery backup
RAM.

NOTE: All the data set in the calibration mode is stored in the EEPROM and ismaintained regardless of battery condition.

AD-4408C Weighing Indicator

Page 20

7.2.

Calibration With an Actual Load (Cal5et)

Calibration is performed using a calibration weight
Before performing calibration for the first time, set the unit, decimal point position,
minimum division and weighing capacity in the calibration-related function mode.
NOTE: To avoid drift caused by changes in temperature, warm up the indicator forten minutes or more before performing calibration with an actual load.
Step 1 Press the ON/OFF key to turn the indicator ON (weighing mode) if it is in the
OFF mode.
Remove the CAL key cover and press the CAL key.
CalL is displayed to indicate that the indicator enters the calibration mode.
Step 2 Press the ENTER key to display Cal5et . The indicator enters the mode ofcalibration with an actual load. To return to the weighing mode, press the ESC
key.
Zero calibration
Step 3 Press the ENTER key to display Cal 0 .
If zero calibration is not to be performed, press the F key and go to step 5.
To monitor the current weight value, press the CAL key. Press the CAL key
again to display

CalL 0 .

Step 4 With nothing placed on the load cell, wait for the stabilization indicator to turn
ON and press the ENTER key. - - - - - - is displayed for approximately two
seconds.
Span calibration
Step 5 Press the ENTER key when Cal5pn is displayed.
The calibration weight value (the weighing capacity currently set) is displayed
and the least digit of the value blinks.
< > ∧ ∨ keys: Press to correct the value to the value of the calibration weightused.
CAL key: Press to monitor the current value (the gross weight) andpress again to display the calibration weight value.
ESC key: Press three times to return to the weighing mode without
performing span calibration.
Step 6 Place a calibration weight on the load cell. Wait for the stabilization indicator toturn ON and press the ENTER key. - - - - - - is displayed for approximately
two seconds.
Step 7

Calendis displayed. To re-adjust the span, press the F key.

Page 21

AD-4408C Weighing IndicatorStep 8 Press the ESC key. Cal5et is displayed and the calibration data is written
into the EEPROM.
The current state is the same as that of step 2. To return to the weighing mode,press the ESC key again.

NOTE: If C errX is displayed, an error has occurred. Refer to “7.4. Calibration
Errors” to take some measures.
If the decimal point blinks, it indicates that the current value is not theweight value.

AD-4408C Weighing Indicator

Page 22

7.3.

Calibration-Related Functions (Calf)

Step 1 Press the ON/OFF key to turn the indicator ON (weighing mode) if it is in the
OFF mode.
Remove the CAL key cover and press the CAL key.
Cal

is displayed to indicate that the indicator enters the calibration mode.

Step 2 Press the ENTER key to display Cal5et . The indicator enters the mode ofcalibration with an actual load. To return to the weighing mode, press the ESC
key.
Step 3 Press the ∧ or ∨ key to selectCalfF

and press the ENTER key.

Step 4 Press the ∧ or ∨ key to select a function number to be used and press the
ENTER key. The current setting value is displayed.
Step 5 Change the value as necessary. Two methods to change are available,
depending on the function number as below
MethodDescription
Only the available parameter is displayed and blinks.
Selecting a parameter
Press the ∧ or ∨ key to select a parameter.
All the digits are displayed and a digit to be changed
blinks.
Inputting the value
Press the < or > key to select a digit andpress the ∧ or ∨ key to change the value.
After setting, press the ENTER key. The next function number is displayed.
When the value is not to be changed, press the ESC key to return to thefunction number display.
Step 6 Press the ESC key.
Cal5etis displayed and the data of thecalibration-related functions is written into the EEPROM.
The current state is the same as that of step 2. To return to the weighing mode,press the ESC key again.
NOTE: If a value exceeding the settable range is entered, err dt is displayed andthe input is canceled.
If the decimal point blinks, it indicates that the current value is not theweight value.

Page 23

AD-4408C Weighing IndicatorFunction No.
Parameter or
Setting range

Function

Calf01
0 to 3

Unit

Calf020 to 5

Decimalpoint
position

Calf03
1 to 6

Minimum
division

Calf04Weighing
1 to 999999 capacity

Calf050 to 100

Description
Unit of the weight value
0: None
1: g
2: kg
3: t
4: lb (USA version)
Decimal point position of the weight value
0: None 123456
12345.6
1: 101
2: 1021234.563
3: 10
123.456
4: 10412.3456
5
5: 10
1.23456
Minimum division (d) of the weight value
1: 1
2: 2
3: 5
4: 10
5: 20
6: 50
Weighing capacity of the weighing
instrument
Weighing is possible up to the value of thissetting plus 8 d. If the value exceeds this,overflow will occur and will not be
displayed.

The decimal point position is the same as
the setting of Calf02.
Range to enable zero adjustment by theZERO key or a command from the CC-Link
master station.
Expressed in percent of the weighing
capacity with the calibration zero point as
Zero
the center, when performing power-ON
adjustment
zero, with the initial zero point as therange
center.
For example, if this is set to 2, the value inthe range of ±2% of the weighing capacitywith the calibration zero point at the center
will set to zero.

AD-4408C Weighing Indicator

Page 24

Default
value

2

0

1

20000

2

Function No.
Parameter or
Setting range

Calf06
0.0 to 5.0

Calf07
0.0 to 9.9

Default
value

Function

Description

Zerotracking
time

Performs zero tracking using this setting in
combination with the setting of the zero
tracking band.
When 0.0, zero tracking will not be
performed.

Zerotrackingband

Unit: second in 0.1 increments
Performs zero tracking using this setting in
combination with the setting of the zero
tracking time.
When 0.0, zero tracking will not be
performed.

0.0

0.0

Unit: d (minimum division) in 0.1 increments

Page 25

AD-4408C Weighing IndicatorFunction No.
Parameter or
Setting range

Calf080.0 to 9.9

Calf090 to 9Default
value

Function

Description

Stability
detection
time

Performs stability detection using this setting
in combination with the setting of the stability
detection band.
When 0.0, stability detection will not be
performed. (Stable all the time)

Stability
detection
band

Unit: second in 0.1 increments
Performs stability detection using this setting
in combination with the setting of the stability
detection time.
When 0, stability detection will not be
performed. (Stable all the time)

1.0

2

Unit: d (minimum division)

Stability detection outputs the STABLE signal when changes in
the weight value are within a certain range during a certain time.

Weightvalue

CALF09

CALF08

CALF09
CALF08STABLEsignalCalf100 to 1
Calf11
0 to 1
Calf120 to 1

Tare andzero
adjustment
when
unstable
Tare when
the grossweight is
negative
Outputwhen
overflowandunstable

AD-4408C Weighing Indicator

Tare and zero adjustment when the weightvalue is unstable.
0: Disables both functions.
1: Enables both functions.

1

Tare when the gross weight is negative.
0: Disables tare.
1: Enables tare.

1Standard serial output if the weight value
overflows and is unstable.
0: Disables output.
1: Enables output.

1

Page 26

Function No.
Parameter or
Setting range

Calf13
1 to 3

Calf14
1 to 2
Calf150 to 1
Calf160 to 1
Calf17-7.00000 to
7.00000

Calf180.00001 to
9.99999

Calf191 to 999999

Function

Description

Condition to judge over when the grossweight is negative.
Over at
A/D negative over or
negative
1: Gross weight < -999999
gross weight
2: Gross weight < negative weighing capacity
3: Gross weight < -19 dCondition to judge over when the net
Over atweight is negative.
negative net
Gross weight negative over orweight1: Net weight < -999999
2: Net weight < negative weighing capacity
Select whether or not to clear the zero
Clear the zero value.
value
0: Disables.
1: Enables.
Select whether or not to perform zero
Zero upon
upon power-ON.
power-ON
0: Disables.
1: Enables.
Input voltage from a load cell at zero.
Input voltage
at zeroDefault
value

1

1

1

0

Unit: mV/V
In zero calibration during the calibration 0.00000
with an actual load, this value isdetermined.
Input voltage from a load cell at span

Unit: mV/V
Input voltage
In span calibration during the calibration 2.00000
at spanwith an actual load, this value and thevalue of Calf19 are determined.
The calibration weight value corresponding
Calibration
to the Input voltage at span of Calf18.
weight value
corresponding When performing digital span, Calf17,
20000
to Input
18 and 19 are required.
voltage at
The decimal point position is the same as
span
the setting of Calf02.

Page 27

AD-4408C Weighing IndicatorInputvoltage

CALF18
CALF17
CALF190
Displayed
weight0

NOTE: Record the setting values of Calf17, 18 and 19 in the “Setting List” atthe end of the manual to prepare against a failure.
By changing the parameters of Calf17, 18 and 19, “zero calibration”
and “span calibration” can be adjusted optionally. (Digital span
accuracy approx. 1/5000: The accuracy varies depending on the loadcell output accuracy and the conditions of calibration.)
Except for an emergency, perform calibration with an actual load.

Calf200 to 1

Output when
the gross weightis negative

Calf21
0 to 1

Communication
restriction

Calf22
1 to 2Header 2

AD-4408C Weighing Indicator

Output by the manual print command when
the gross weight is negative.
0: Enables output.
1: Disables output.
Restriction on network-related
communication such as changing station
numbers or ID numbers and outputting byauto printing
0: Disables restriction.
1: Enables restriction.
Second header for serial output
1: GS / NT / TR
2: G_ / N_ / T_ (_ space)

Page 28

0

0

1

7.4.

Calibration Errors

When an error occurs during calibration, the error number is displayed.
If calibration is finished without releasing the error, the setting values will be restored tothe state before calibration.
Calibration errors and remedies
Error No.
Description

C err1

C err2

C err3C err4C err5C err6
C err8C err7

RemedyMake the minimum division
greater or make theThedisplay
resolution(weighing weighing capacity smaller.
capacity / minimum division) exceeds
The specified value
the specified value.
depends on the instrument
or specifications.
Check the load cell rating
and connection.
Voltage at zero calibration exceeds in
When nothing is wrong withthe positive direction.
the rating and connection,
adjust the load cell output
as described in the next
section.
Voltage at zero calibration exceeds in When the load cell or A/D
converter may be the cause
the negative direction.
of error, confirm it by using
the check mode.
The value of the calibration weight
Use an appropriate
exceeds the weighing capacity.
calibration weight and
The value of the calibration weight iscalibrate again.
less than the minimum division.
Use a load cell with higher
The load cell sensitivity is not sufficient. sensitivity or make theminimum division greater.
The load cell output voltage is too high Use a load cell with awhen the load of the weighing capacity greater rating or make theis placed.
weighing capacity smaller.
Voltage at span calibration is less than Check
the
load
cell
voltage at the zero point.
connection.

Page 29

AD-4408C Weighing Indicator7.5.

Load Cell Output Adjustment

Add a resistor as shown below to adjust the load cell output.
Use a resistor with a high resistance value and a low temperature coefficient.

SIG-"C Err 3"
When exceeding in the negative direction)

EXC+

EXC+
r
to
is
es d
R dde
a

R
e
a d si sde tord"C Err 2"(When exceeding in the positive direction)

SIG+

SIG-

EXC-

SIG+

EXC-

Fig.6 Load cell output adjustment

NOTE: As the zero adjustment range of the AD-4408C is wide, output adjustment israrely required for the normal load cell.
Before adjusting the load cell output, check the load cell (deformation,clearance around the load cell, incorrect wiring and load cell type) and loadcell connection.

AD-4408C Weighing Indicator

Page 30

8. General Functions
General functions are divided into groups per function and are indicated by the groupname with the function number.
NOTE: General functions determine the AD-4408C performance and all the data are
stored in the EEPROM.

8.1.

Setting Procedure

Step 1 While holding down the ENTER key, press the F key.
fnc is displayed to indicate that the indicator will enter the general function mode.
Step 2 Press the ENTER key. The indicator enters the general function mode.
To return to the weighing mode without entering the general function mode,press the ESC key.
Step 3 Press the ∧ or ∨ key to select the function group to be set.
DisplayGroup name
Basic function
fncf
Standard serial output
Cl f
CC-LinkCC f
Press the ENTER key. The function number will be displayed.
Step 4 Press the ∧ or ∨ key to select the function number to be set.
Press the ENTER key. The current setting value will be displayed.
Step 5 Change the setting value using either one of the methods below.
MethodDescription
Only the available parameter is displayed and blinks.
Selecting a parameter
Press the ∧ or ∨ key to select a parameter.
All the digits are displayed and a digit to be changed
blinks.
Inputting the value
Press the < or > key to select a digit andpress the ∧ or ∨ key to change the value.
After setting, press the ENTER key. The next function number is displayed.
When the parameter is not to be changed, press the ESC key to return to thefunction number display.

Page 31

AD-4408C Weighing IndicatorStep 6 Press the ESC key. The function number disappears and the indicator returns tothe state of step 2.
Press the ESC key to store the setting values in the EEPROM and return to theweighing mode.
NOTE: If a value exceeding the settable range is entered, err dt is displayed andthe input is canceled.
If the decimal point blinks, it indicates that the current value is not theweight value.

8.2.

Adjusting the Digital Filter

Adjust the digital filter using fncf05 (Digital filter) and fncf06 (Frequency divider
ratio).

Method 1

While fncf06 is fixed to 1 (divider ratio 1), adjust fncf05.
Cutoff frequency: 11.0 Hz to 0.7 Hz

Method 2

If Method 1 does not work, perform as follows:
While fncf05 is fixed to 8 (1.0 Hz), adjust fncf06.
Cutoff frequency: 0.5 Hz to 0.1 Hz

Digital filter cutoff frequency =fncf05 cutoff frequency
fncf06 divider ratio

High cutoff frequency
Low cutoff frequency
High response speed⇔ Low response speed
Prone to external disturbanceLess prone to external disturbance

AD-4408C Weighing Indicator

Page 32

8.2.

Basic Functions (fncf)
Function No.
Parameter or
Setting range

Ffncf01
000000 to

111111

Function

Disablekey switch

fncf020 to 6

F key

fncf03
1 to 3

Display
updaterate

fncf040 to 3

display

Default
value

Description
Each digit of the setting corresponds to a key
switch. Only available in the weighing mode.
0: Does not disable the key switch function.
1: Disables the key switch function.
Key assignment
6th

5th

4th

ZERO

TARE

Net/B/GNET GROSS

3rd

2nd

1st

ON/OFF
ESC

ENTER

Assigns a function to the F key.
0: None1: Manual print command
2: Hold
3: Alternate switch
4: Momentary switch
5: Clear the tare weight
6: Clear the zero value
NOTE: Clearing the zero value can be
enabled or disabled by Calf15
1: 20 times/second
2: 10 times/second
3: 5 times/second
Assigns a function to the display.
0: None
1: Zero tracking in progress
2: Alarm (Zero range setting error, over,low battery)
3: F key status
Selects a cutoff frequency.
0: None1: 11.0 Hz
2: 8.0 Hz
3: 5.6 Hz
4: 4.0 Hz
5: 2.8 Hz
6: 2.0 Hz
7: 1.4 Hz
8: 1.0 Hz
9: 0.7 Hz

fncf050 to 9

Digitalfilter

fncf06
1 to 10Frequency
Divides digital filter cutoff frequency by thedividersetting.
ratio
1: Normal hold
Hold
2: Peak holdfncf071 to 2

Page 33

000000(binary)

0

1

0

8

1
1

AD-4408C Weighing Indicator8.3.

Standard Serial Output (Cl f)
Function No.
Parameter or
Setting range

Function

Cl f01
1 to 5

Outputdata

Cl f02
1 to 3Datatransfermode

Cl f03
1 to 2

Baud rate

Description
1: Displayed weight
2: Gross weight
3: Net weight
4: Tare weight
5: Gross/Net/Tare
1: Stream
2: Auto printing (See the NOTE below)
3: Manual printing
1: 600 bps
2: 2400 bps

Default
value

1

1
2

NOTE: When “1: Enables restriction” is selected for Calf21 (Communication
restriction), auto printing will not be performed even if auto printing
conditions are met.

8.4.

CC-Link (CC f)
Function No.
Parameter or
Setting range

Function

CC f01
1 to 64

Stationnumber

CC f020 to 2

Occupiedstations

CC f030 to 4

Baud rate

CC f040 to 1

Initialization

CC f050 to 2

Outputdata

AD-4408C Weighing Indicator

Description
n: Station number
0: One1: Two2: Four
0: 156 kbps
1: 625 kbps
2: 2.5 Mbps
3: 5 Mbps
4: 10 Mbps
0: Not required(When the AD-4408C is turned on
and the CC-Link is ready, the remote
READY flag (RX007B) becomes
active without performing initialization.)
1: Required(When the AD-4408C is turned on
and the CC-Link is ready, the remote
READY flag (RX007B) becomes
active after the initialization iscomplete.)
0: Displayed weight
1: Net weight
2: Gross weight
Specify what data to output when thenumber of occupied stations is 1 or 2.
Page 34

Default
value
1
2

4

1

0

9. Interface
9.1.

Standard Serial Output

The standard serial output with 0 to 20 mA can be connected to a device such as an
A&D printer or remote display. The interface has no power source. Therefore, theexternal devices to be connected must have a power source. The setting values of thestandard serial output are changed in the general functions Cl f01 to Cl f03.
Type
Data bits
Start bit
ParityStop bit
Baud rate
Code

0 to 20 mA current loop
7 bits1 bit
1 bit, even
1 bit
600, 2400 bps
ASCII

9.1.1. Connection
Standard
serial output

Standard
serial output

Internal circuit

Frame ground

8

9

C.LOOP
outputterminal

10

No polarity

C.L.

F.G.

Fig.7 Standard serial output pin connection
Fig.8 Standard serial output internal circuit

NOTE: The standard serial output connection has no polarity.
When a shielded cable is used, connect the shield to the F.G. terminal.

Page 35

AD-4408C Weighing Indicator9.1.2. Output data
The data format used is A&D standard format. This is a format to be used with an A&D
printer or remote display and consists of two headers, data, unit and a terminator.
A&D standard format

Header 1
Header 2
Separator
Data (ASCII code)

Unit (five types)

ASCII code
ST
US
OL
GS
NT
TR
,
0 to 9+SP (space)
.
SP SP
SP g
kg
SP t
lb

Hexadecimal[53 54][55 53][4F 4C][47 53][4E 54][54 52][2C][30 to 39]
[2B]
[2D]
[20]
[2E]
[20 20][20 67][6B 67][20 74][6C 62]

Description
StableUnstable
Overload
Gross weight
Net weight
Tare weight

No unitgkgtlb (USA version)

A&D standard format examples

Gross weight
Net weight
Tare weight
Data with a decimal point
Positive overflow
Negative overflow
Unstable data
“Output OFF” data

NOTE: The decimal point position is the same even when overflow occurs.

AD-4408C Weighing Indicator

Page 36

9.1.3. Data transfer mode
Three data transfer modes are available; stream, auto printing and manual printing.

Stream mode

Auto printing mode

Manual printing mode

9.2.

Transmits data in sync with the display update rate. If
the indicator can not catch up with the update rate
because of the baud rate, the transmission is paused
until the next updating.
The transmitted data is the same as what is being
displayed. Data that is not displayed is nevertransmitted.
Transmits data once only when the weight value with
5 d or greater is stable.
For another transmission, the weight value must fall
below 5 d once.
Transmits data when the F key that is assigned to
Manual print command is pressed or a command issent from the CC-Link master station.

CC-Link

The AD-4408C CC-Link is a remote device station of CC-Link ver.1.10. When a
CC-Link is used, the AD-4408C can be controlled by the PLC remote I/O or remoteregisters. So, the program can be simple. And connection to a PLC is simple, thus, aweighing system can be built easily. The setting values of CC-Link are changed in thegeneral functions CC f01 to CC f04.
Station number
Number of occupied stations
Baud rate
Initialization

1 to 64
1 station, 2 stations, 4 stations
156 kbps, 625 kbps, 2.5 Mbps, 5 Mbps, 10 Mbps
Not required or required

Communications connector
The connector used can be attached or removed while the power is ON.
The function of each signal line is as follows.
DA
DB
DG
SLD
FG

Signal DA
Signal DB
Signal ground
ShieldFrame ground

Page 37

AD-4408C Weighing Indicator

Status LEDs
LED

ON

RUN

NormalSD
RD

Transmitting
Receiving• Setting error• CRC error• Station trouble

ERR

OFF
• Resetting• No signal

NormalFig.9 CC-Link connector and LEDs

AD-4408C Weighing Indicator

Page 38

Blinking

When the setting
values are changed

9.2.1. Address map
Remote register (Number of occupied stations: 4)Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
RemoteBufferRemoteBufferStationName
Nameregister memory
registermemoryRWr0000
2E0
RWw0000
1E0
Net weight
RWr0001
2E1
RWw0001
1E1
1
RWr0002
2E2
RWw0002
1E2
Gross weight
RWr0003
2E3
RWw0003
1E3
RWr0004
2E4
Reserved
RWw0004
1E4
internally
RWr0005
2E5
RWw0005
1E5
Reserved
2
internally
RWr0006
2E6
Error code
RWw0006
1E6
RWr0007
2E7
Error sub-code RWw0007
1E7
RWr0008
2E8
RWw0008
1E8
Reserved
RWr0009
2E9
RWw0009
1E9
3internally
RWr000A
2EA
RWw000A
1EA
RWr000B
2EB
RWw000B
1EB
RWr000C
2EC
RWw000C
1EC
CommandCommand data
data response RWw000D
RWr000D
2ED
1ED
4RWr000E
2EE
Command No. response RWw000E
1EE
Command No.
RWr000F
2EF
Reserved internally RWw000F
1EF
Reserved internally
Remote register (Number of occupied stations: 2)
Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
RemoteBufferRemoteBufferName
Name
Stationregister memory
registermemoryRWr0000
2E0
1E0
Displayed value RWw0000(Net / Gross) RWw0001
Reserved
RWr00012E1
1E1
1internally
RWr0002
2E2
Error code
RWw0002
1E2
RWr0003
2E3
Error sub-code RWw0003
1E3
RWr0004
2E4
Command
RWw0004
1E4
Command data
data response RWw0005
RWr00052E5
1E5
2RWr0006
2E6
Command No. response RWw0006
1E6
Command No.
RWr0007
2E7
Reserved internally RWw0007
1E7
Reserved internally
Remote register (Number of occupied stations: 1)
Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
RemoteBufferRemoteBufferStationName
Nameregister memory
registermemoryRWr0000
2E0
Displayed value RWw0000
1E0(Net / Gross) RWw0001
RWr0001
2E1
1E1
Reserved
1
internally
RWr0002
2E2
Error code
RWw0002
1E2
RWr0003
2E3
Error sub-code RWw0003
1E3

Page 39

AD-4408C Weighing Indicator

Numeric values of the remote register
All the values are hexadecimal. Negative values are expressed by the two’s complement.
Decimal Hexadecimal (16 bits)
Hexadecimal (24 bits)
Hexadecimal (32 bits)-10
FFF6
FFFFF6FFFFFFF6-1FFFF
FFFFFF
FFFFFFFF
00000
00000000000000
1
0001
00000100000001
10000A
00000A
0000000A
NOTE: Writing is prohibited in the internally reserved areas.
Writing in the remote output (RY) and the remote register (RWw) of theinternally reserved areas may cause the indicator to malfunction.
Values of the remote input (RX) and the remote register (RWr) of theinternally reserved areas are not fixed.
Error code
Error code
0
1
2
3
4
5

Error status flag (Indicator error)
No errorAD error (Module error)
EEPROM error (Writing error)
RAM error (Writing error)
Calibration error (Calibration value error)
Display error (Mode error)

AD-4408C Weighing Indicator

Page 40

Remote I/O (Number of occupied stations: 4)Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
RemoteBufferRemoteBufferStation
Name
Name
input
memoryoutputmemoryRX0000
RY0000Reserved
Reservedinternallyinternally
RX0001
RY0001
Command processing
Command processing
RX0002
RY0002
responserequestRX0003
Read/write response RY0003
Read/write request
RX0004
Reserved
RY0004internally
RX0005
RY0005
CPU normal
RX0006
RY0006
operation
0E0
160RX0007
Reserved internally RY0007
RX0008RY0008
Decimal 20
Reserved
1 3-bitpoint 2RX0009RY0009binaryinternally
position 22
RX000A
RY000A
RX000B
RY000B
RX000C
RY000C
RX000D
RY000D
RX000E
RY000E
1RX000F
RY000F
Reserved
RX0010
RY0010Zerointernally
RX0011
RY0011
Clear zero
RX0012
RY0012
Tare
RX0013
RY0013
Clear tare
RX0014RY0014Hold
RX0015RY0015Net display
RX0016
RY0016Gross display
RX0017
StableRY0017
Print command0E1
161RX0018Reserved internally RY0018
RX0019
Capacity exceeded RY0019
RX001A
Hold in progress
RY001A
RX001B
RY001B
Reserved
RX001C
RY001C
Reservedinternally
RX001D
RY001Dinternally
RX001E
RY001E
RX001F
Weighing failure
RY001F
RX00202
0E2RX0020162|||
Reserved internally||
RX005F30E5RX005F
165

Page 41

AD-4408C Weighing IndicatorAD-4408C --> Master station
Master station --> AD-4408C
RemoteBufferRemoteBufferStation
Name
Name
input
memoryoutputmemoryRX0060Net over
RY0060RX0061
Net under
RY0061RX0062Gross over
RY0062RX0063Gross under
RY0063RX0064
A/D over
RY0064RX0065A/D under
RY0065
Net in the
RX0066
RY0066center of zero
Gross in the
RX00670E6RY0067166
center of zero
RX0068Net display
RY0068RX0069Gross display
RY0069RX006A
Tare in progress RY006A
Reserved
RX006BLow battery
RY006Binternally
RX006C
Zero error
RY006C
RX006D
Tare error
RY006D
RX006ENet display error RY006E
RX006FIn sync with
RY006F
4
RX0070
RY0070RX0071
RY0071
RX0072
RY0072
RX0073
Reserved
RY0013internally
RX0074
RY0074
RX0075
RY0075
RX0076
RY0076
RX0077
RY0077
Request flag of
Reply flag ofRX0078
RY00780E7167
initialization
initialization
Reply flag of initial
Request flag of initial
RX0079
RY0079data setting
data setting
Request flag ofRX007A
Error status flag
RY007Aerror reset
RX007B
Remote READY flag RY007B
RX007CRY007C
Reserved
RX007D
Reserved
RY007Dinternallyinternally
RX007ERY007E
RX007F
RY007F

AD-4408C Weighing Indicator

Page 42

Remote I/O (Number of occupied stations: 2)
Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
RemoteBufferRemoteBufferStation
Name
Name
input
memoryoutputmemoryRX0000
RY0000Reserved
Reservedinternallyinternally
RX0001
RY0001
Command processing
Command processing
RX0002
RY0002
responserequestRX0003
Read/write response RY0003
Read/write request
RX0004
Reserved
RY0004internally
RX0005
RY0005
CPU normal
RX0006
RY0006
operation
0E0
160RX0007
Reserved internally RY0007
RX0008RY0008
Decimal 20
Reserved
1 3-bitpoint 2RX0009RY0009binaryinternally
position 22
RX000A
RY000A
RX000B
RY000B
RX000C
RY000C
RX000D
RY000D
RX000E
RY000E
1RX000F
RY000F
Reserved
RX0010
RY0010Zerointernally
RX0011
RY0011
Clear zero
RX0012
RY0012
Tare
RX0013
RY0013
Clear tare
RX0014RY0014Hold
RX0015RY0015Net display
RX0016
RY0016Gross display
RX0017
StableRY0017
Print command0E1
161RX0018Reserved internally RY0018
RX0019
Capacity exceeded RY0019
RX001A
Hold in progress
RY001A
Reserved
RX001B
RY001Binternally
Reserved
RX001C
RY001C
internally
RX001D
RY001D
RX001E
RY001E
RX001F
Weighing failure
RY001F

Page 43

AD-4408C Weighing IndicatorAD-4408C --> Master station
RemoteBufferStationName
input
memoryRX0020Net overRX0021
Net under
RX0022Gross over
RX0023Gross under
RX0024
A/D overRX0025A/D under
Net in the
RX0026center of zero
Gross in the
RX00270E2
center of zero
RX0028Net display
RX0029Gross display
RX002A
Tare in progress
RX002BLow battery
RX002C
Zero error
RX002D
Tare error
RX002ENet error
RX002FIn sync with2
RX0030RX0031RX0032RX0033
Reservedinternally
RX0034RX0035RX0036RX0037
Request flag of
RX00380E3
initialization
Reply flag of initial
RX0039data setting
RX003A
RX003B
RX003C
RX003D
RX003E
RX003F

AD-4408C Weighing Indicator

Error status flag

Master station --> AD-4408C
RemoteBufferName
outputmemoryRY0020
RY0021
RY0022
RY0023
RY0024
RY0025
RY0026
RY0027
RY0028
RY0029
RY002A
RY002B
RY002C
RY002D
RY002E
RY002F
RY0030
RY0031
RY0032
RY0033
RY0034
RY0035
RY0036
RY0037
RY0038
RY0039RY003A

Remote READY flag RY003B
RY003C
Reserved
RY003Dinternally
RY003E
RY003F

Page 44

162

Reservedinternally163

Reply flag of
initialization
Request flag of initial
data setting
Request flag oferror reset
ReservedinternallyRemote I/O (Number of occupied stations: 1)
Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
RemoteBufferRemoteBufferStation
Name
Name
input
memoryoutputmemoryRX0000
RY0000Zero
RX0001
RY0001
Clear zero
RX0002
RY0002
Tare
Reserved
RX0003
RY0003
Clear tareinternally
RX0004RY0004
Hold
RX0005
RY0005Net display
RX0006
RY0006Gross display
RX0007
Stable
RY0007
Print command
0E0
160RX0008Reserved internally RY0008
RX0009capacity exceeded RY0009
RX000A
Hold in progress
RY000A
RX000B
RY000B
Reserved
RX000C
RY000C
internally
RX000D
RY000D
RX000E
RY000E
Reserved
RX000F
Weighing failure RY000F
internally
RX0010
RY00101RX0011
RY0011RX0012
RY0012RX0013
Reserved
RY0013internally
RX0014RY0014RX0015RY0015RX0016
RY0016RX0017RY0017
Request flag of
Reply flag of
RX0018RY00180E1161
initialization
initialization
Reply flag of initial
Request flag of initial
RX0019RY0019data setting
data setting
Request flag of
RX001A
Error status flag
RY001Aerror reset
RX001B
Remote READY flag RY001B
RX001C
RY001C
Reserved
RX001D
Reserved
RY001Dinternallyinternally
RX001E
RY001E
RX001F
RY001F
Weighing failure
Net over
Gross over
A/D overLow battery
Tare error

Net under
Gross underA/D under
Zero error
Net display error

Page 45

AD-4408C Weighing Indicator9.2.2. Commands
The write command is used to send a command to the AD-4408C from the masterstation. For details, refer to “Write command” in “9.2.3. Timing chart”.
Command No.
0
0
0
0
0
0
0
0

Command data
1
2
3
4
5
6
7
8

Command
Zero
Clear zero
Tare
Clear tareHold
Net display
Gross display
Print command

9.2.3. Timing chart
Below examples are when the station number is set to 1 and the number of occupied
stations is set to 4.
When the AD-4408 is turned on
When the AD-4408C is turned on and the CC-Link is ready, the request flag of
initialization (RX0078) becomes active.
The master station confirms that RX0078 is active, performs initialization and turns the
reply flag of initialization (RY0078) ON.
The AD-4408C turns the request flag of initialization (RX0078) OFF and turns the
remote READY flag (RX007B) ON.
Turn OFF the reply flag of initialization (RY0078) in the master station.
NOTE: When CC f04 of the CC-Link functions is set to 0 (Initialization not
required), the remote READY flag (RX007B) becomes active without
performing initialization.
When the request flag of initialization(RX0078) is ON, the reply flag of
initialization (RY0078) is turned ON.
PowerON
Request flag of initialization (RX0078)
Reply flag of initialization (RY0078)
Remote READY flag (RX007B)
Fig.10 Performance upon power-ON

AD-4408C Weighing Indicator

Page 46

When the request flag of
initialization (RX0078) is OFF,the reply flag of initialization(RY0078) is turned OFF.

Resuming from suspended modes
When the AD-4408C is in a mode that suspends weighing, such as calibration or OFF
mode, the remote READY flag (RX007B) becomes inactive because a correct weightvalue can not be output.
To resume from this condition, take the same steps as described in “When the
AD-4408C is turned on” above.
Requesting initialization from the master station
When requesting the initial data setting to the AD-4408C from the master station, turnthe request flag of initial data setting (RY0079) ON while the remote READY flag
(RX007B) is active.
The AD-4408C turns the remote READY flag (RX007B) OFF and performs initial datasettings.
When initial data settings are complete, the reply flag of initial data setting (RX0079) isturned ON.
Turn OFF the request flag of initial data setting (RY0079) in the master station.
When the remote READY flag
(RX007B) is ON, the request flagof initial data setting (RY0079) isturned ON.

When the reply flag of initial datasetting (RX0079) is ON, therequest flag of initial data setting(RY0079) is turned OFF.

Request flag of initial data setting (RY0079)
Remote READY flag (RX007B)
Reply flag of initial data setting (RX0079)

When the reply flag of initial data setting(RX0079) is OFF, the remote READY
flag (RX007B) is turned ON again.
Fig.11 Performance of request flag of initial data setting

Page 47

AD-4408C Weighing Indicator

Write command
Specify the data type to write by the command No. (RWw000E).
Place the data to write in the command data (RWw000C to RWw000D).
The read/write request (RY0003) isOFF.
Read/write request (RY0003)
Command No. (RWw000E)
Command data (RWw000C to 000D)
Command processing request (RY0002)
Read/write response (RX0003)
Command No. response (RWr000E)
Command processing response (RX0002)

Fig.12 Performance of the write command

CPU normal operation
The CPU normal operation (RX0006) is a signal to check that the AD-4408C is turnedon and it functions normally. During normal operation, the signal is reversed at aninterval of 0.5 to 1 second.

CPU normal operation (RX0006)
0.5 to 1 second

Fig.13 CPU normal operation signal

AD-4408C Weighing Indicator

Page 48

Error status flag
When an error occurs to the AD-4408C, the remote READY flag (RX007B) becomesinactive and the error status flag (RX007A) becomes active to inform the master stationof the error occurrence.
The master station requests to reset the error status flag, by activating the request flagof error reset (RY007A).
Error status flag (RX007A)
Requestof errorreset (RY007A)
Errorflagreset
request(RY007
Remote READY flag (RX007B)
Error code (RWr0006)
Error sub-code (RWr0007)

Error code (RWr0006) andError sub-code (RWr0007)
will be cleared to 0.
Fig.14 Resetting the error status flag

Page 49

AD-4408C Weighing Indicator10. Maintenance
10.1.

Error Messages

If an error message is displayed, refer to the chart below to take proper measures.
Error message

ad errra erreeperrCalerrlb errC errXerr dt

10.2.

Cause
RemedyData can not be acquired
Repair is required.
from the A/D converter.
Data can not be written into
Repair is required.
the battery backup memory.
Perform initialization.
Correct data can not be
If initialization does not clear theread from the EEPROM.
error, repair is required.
Calibration data is not
Perform calibration.
correct.
No battery backup. The Perform zero adjustment or clear
zero and tare values are the zero value. And then, updatecleared.
the zero value.
Calibration error
Refer to “7.4. Calibration Errors”.
The setting value is out of Check the setting value and set
the settable range.
again.

Check Mode

The check mode checks the performance of the display, key switches and external I/O.
10.2.1. Entering the check mode
Step 1 While holding down the ENTER key, press the F key.
fnc is displayed to indicate that the indicator will enter the general functionmode.
To return to the weighing mode, press the ESC key.
Step 2 While holding down the ZERO key, press the ENTER key.
1Chc is displayed to indicate that the indicator will enter the check mode.
Press the ENTER key again to display an item to be checked.
Step 3 Press the ∧ or ∨ key to select the item to be checked and press the ENTER key
to enter the check mode of the selected item.
To exit from the current mode, press the ESC key.

AD-4408C Weighing Indicator

Page 50

Display

ChckeyChc ClChc CC
Chc r5
Chc adChc inChcpr9
C5 pr9C5 eepItem to be checked
Key switches
Standard serial output
CC-Link
Testing terminal
A/D (Load cell)
Internal countProgram version
Program checksum
Memory (EEPROM) checksum

10.2.2. Checking the key switches
With Chckey displayed, press the ENTER key to enter the key switch check mode. In
the key switch check mode, six squares ( ) are displayed. Each square corresponds toa key switch as shown below.
When a key switch is pressed, the corresponding square moves up ( ).
When the CAL key is pressed, the minus LED turns ON.
To exit from the key switch check mode, press the ESC key twice.

CAL

ZERO

TARE

Net/B/GNET GROSS

ON/OFF
ESC

ENTER

10.2.3. Checking the standard serial output
With Chc ClL displayed, each time the ENTER key is pressed, the test data istransmitted with the baud rate set in the general functions and the decimal point blinks.
Test data S T , G S , + 0 0 0 0 0 . 0 k g CR LF

Page 51

0.0

AD-4408C Weighing Indicator10.2.4. Checking the CC-Link
With Chc CC displayed, press the ENTER key to enter the CC-Link check mode.
Press the ∧ or ∨ key to change the address.
Press the CAL key to transmit the request flag of initialization.

2 digits: Address (00 to 3F)
4 digits: Data (0000 to FFFF)

88.8888
Remote READY flag
Error status flag
Reply flag of initial data setting
Request flag of initialization
CPU normal operation
Link status
Address
05 to 0C
0D to 1C
25 to 2C
2D to 3C

Remote I/O
RY0000 to RY007F
RWw0000 to RWw000F
RX0000 to RX007F
RWr0000 to RWr000F

Buffer memory
160 to 167
1E0 to 1EF
0E0 to 0E7
2E0 to 2EF

10.2.5. Checking the testing terminal
The Chc r5 display is for checking the testing terminal. Do not use it.
10.2.6. Checking the A/D (load cell)
With Chc ad displayed, press the ENTER key to enter the A/D check mode. The load cell
output value is displayed in mV/V.
The example below is when the internal count is 1.23456 mV/V.

1.23456
If the internal count exceeds ±7mV/V, the load cell may be damaged or the load cell may
be connected incorrectly. Refer to “10.4. Checking the Load Cell Connection Using theDigital Multimeter” to check the connection.
10.2.7. Checking the internal countWith Chc in displayed, press the ENTER key to enter the internal count check mode.
The internal count value (display value times 10) is displayed.
The example below is when the internal count is 123.

123.
AD-4408C Weighing Indicator

Page 52

10.2.8. Checking the program version
With Chcpr9 displayed, press the ENTER key to display the version of the current
program. The example below is when the program version is 1.00.

p001.00
10.2.9. Checking the program checksumWith C5 pr9 displayed, press the ENTER key to display the program checksum. The
example below is when the checksum is EF.

C500ef10.2.10. Checking the EEPROM checksumWith C5 eepEP displayed, press the ENTER key to display the EEPROM checksum. The
memory set in the general functions is not counted.
The example below is when the checksum is EF.

C500ef10.2.12. Checking the calibration-related functions
About the settings of the calibration-related functions, refer to “7.3. Calibration-Related
Functions”.

Page 53

AD-4408C Weighing Indicator10.3.

Initialization Mode

The initialization restores the contents of the battery backup RAM and EEPROM to thedefault values.
The three types of initialization are available as shown below.
Initialization mode

Display

RAM initialization

ini raGeneral functions
initialization

inifncAll data
initialization

iniallDescription
Initializes the contents of the battery
backup RAM only.
As the zero and tare values are stored in
the battery backup RAM, they will be
restored to 0.
Initializes the contents of the generalfunctions stored in the battery backup
RAM and EEPROM.
Initializes all the contents in the battery
backup RAM and EEPROM.
The calibration-related data is also initialized.
So, calibration is required before using
the indicator again.

10.3.1. RAM initialization / General functions initialization
Step 1 While holding down the ENTER key, press the F key.
fnc is displayed to indicate that the indicator will enter the general functionmode.
To return to the weighing mode, press the ESC key.
Step 2 While holding down the ZERO key, press the ENTER key.
1Chc

is displayed to indicate that the indicator will enter the check mode.

Step 3 Press the ∧ or ∨ key to select the initialization mode ( ini ) and press the
ENTER key.
Step 4 Press the ∧ or ∨ key to select the item to be initialized and press the ENTER
key.
Step 5 All the status LEDs blink to prompt a confirmation. To initialize, hold down the
ENTER key for three seconds or more.
After initialization, the indicator is reset and all the display segments are ON.
And the indicator enters the weighing mode.
To exit from this mode without performing initialization, press the ESC key.

AD-4408C Weighing Indicator

Page 5410.3.2. All data initialization
Step 1 Remove the cover concealing the CAL key and press the CAL key.
Cal

is displayed to indicate that the indicator enters the calibration mode.

Step 2 Press the ENTER key to display Cal5et . The indicator enters the mode ofcalibration with an actual load. To return to the weighing mode, press the ESC
key.
Step 3 Press the ∧ or ∨ key to select the all data initialization mode ( iniallLL ) andpress the ENTER key.
Step 4 All the status LEDs blink to prompt a confirmation. To initialize, hold down the
ENTER key for three seconds or more.
After initialization, the indicator is reset and all the display segments are ON.
And the indicator enters the weighing mode.
To exit from this mode without performing initialization, press the ESC key.

Page 55

AD-4408C Weighing Indicator10.4.

Checking the Load Cell Connection Using the Digital Multimeter

Using the digital multimeter, load cell connection can be checked easily.
The figure below indicates the measurement points to check the connection.
When a summing box is used, the same measurements are required inside the box.

Fig.15 Checking the load cell connection

Checking the load cell connection
Measurement point
EXC+
1
EXC+
1

SEN+
2

What to measure

How to judge
Normally less than 100mV.

Voltage drop at
EXC+ of the loadcell cableCan exceed 1V when the load cell cable isextremely long.
Should be 0V for 4-wire connection.

EXC4

Load cell excitation
voltage

SEN3

EXC4

Normally less than 100mV.
Voltagedropat
Can exceed 1V when the load cell cable isEXC- of the load cell
extremely long.
cable
Should be 0V for 4-wire connection.

SIG6

EXC4

Load cellvoltage

SIG+
5

SIG6

medianLoad cell output
voltage

Correct value: 4.75 to 5.25V

About 2.5V (half of the excitation voltage)
Compared with the theoretical value
obtained from the load cell rating, actualload and excitation voltage.
Normally 0 to 15mV.

AD-4408C Weighing Indicator

Page 56

If the AD-4408C does not function properly, contact the nearest A&D dealer.
Use the chart below to write necessary items before contacting the dealer.
Item
Record your value
Description
For 4-wire connection, a jumper is□ 4-wire connection
required between EXC+ andLoad cell connection
SEN+, and between EXC- and□ 6-wire connection
SIG-.
Load cell type
Load cell rating[Unit]
Load cell rated output[mV/V]
Load cell maximum safe[%]
overload
Number of load cells used
[pcs]
Summing box(status of use)
Cable length between the indicator
Length of extension cable[m] and the device such as a summingbox
Indicator initial load
[Unit]
Indicator minimum
In case of decimal number, all the[Unit]division
digitsExample: 0.002 kg
Indicator weighing
In case of decimal number, all the[Unit]capacity
digitsExample: 10.000 kg-0.1mV/V to load cell rated
Load cell output value at[mV/V] sensitivity
the initial load (at no load)(depending on the initial load)
When loaded to capacity, theLoad cell output value
Load cell output value
output value at the initial load +[mV/V]
when loaded to capacity
at the loadload cell rated output(or when a mass of[Unit](within the maximum safe
choice is loaded)
overload)
Measurement point
EXC+
SEN+
1
2
EXC+
EXC1
4
SENEXC3
4
SIGEXC6
4
SIG+
SIG5
6

What to measure
Voltage drop at EXC+ of theload cell cable

Result[mV]

Load cell excitation voltage[V]

Voltage drop at EXC- of theload cell cable[mV]

Load cell median voltage[V]

Load cell output voltage[mV]

Page 57

AD-4408C Weighing Indicator11. Setting List
When performing maintenance, use the following list as a memo.
In case of inquiry about the product, inform of the user setting.

11.1.

Basic Functions

Function No.
Parameter or
Setting range
Ffncf01
000000 to

111111

fncf020 to 6

fncf03
1 to 3

fncf040 to 3

fncf050 to 9Description

Default
value

Disable key switch
000000
0: Does not disable the key switch function.
(binary)
1: Disables the key switch function.
Assigns a function to the F key.
0: None1: Manual print command
2: Hold
03: Alternate switch
4: Momentary switch
5: Clear the tare weight
6: Clear the zero value
Display update rate
1: 20 times/second
1
2: 10 times/second
3: 5 times/second
Assigns a function to the display.
0: None
1: Zero tracking in progress
0
2: Alarm (Zero range setting error, over,low battery)
3: F key status
Digital filter (cutoff frequency)
0: None1: 11.0 Hz
2: 8.0 Hz
3: 5.6 Hz
4: 4.0 Hz
8
5: 2.8 Hz
6: 2.0 Hz
7: 1.4 Hz
8: 1.0 Hz
9: 0.7 Hz

fncf06
1 to 10Frequency divider ratio1

fncf071 to 2Hold
1: Normal hold
2: Peak hold1

AD-4408C Weighing Indicator

Page 58

User
setting

11.2.

Standard Serial Output

Function No.
Parameter or
Setting range

Cl f01
1 to 5

Cl f02
1 to 3
Cl f03
1 to 2

11.3.

Description
Output data
1: Displayed weight
2: Gross weight
3: Net weight
4: Tare weight
5: Gross/Net/Tare
Data transfer mode
1: Stream
2: Auto printing
3: Manual printing
Baud rate
1: 600 bps
2: 2400 bps

Default
value

User
setting1

1
2

CC-Link

Function No.
Parameter or
Setting range

CC f01
1 to 64
CC f020 to 2

CC f030 to 4
CC f040 to 1
CC f050 to 2

Description
Station number
n: Station number
Number of occupied stations
0: One1: Two2: Four
Baud rate
0: 156 kbps
1: 625 kbps
2: 2.5 Mbps
3: 5 Mbps
4: 10 Mbps
Initialization
0: Not required
1: Required
Output data
0: Displayed weight
1: Net weight
2: Gross weight

Page 59

Default
value

User
setting

1
2

4

1
0

AD-4408C Weighing Indicator11.4.

Calibration-Related Functions

Function No.
Parameter or
Setting range

Description

Defaultvalue

Calf01
0 to 3

Unit of the weight value
0: None
1: g
2: kg
3: t
4: lb (USA version)2

Calf020 to 5

Decimal point position of the weight value: 10n0

Calf03
1 to 6

Calf04
1 to 999999

Calf050 to 100
Calf06
0.0 to 5.0
Calf07
0.0 to 9.9
Calf080.0 to 9.9
Calf090 to 9Calf100 to 1
Calf11
0 to 1
Calf120 to 1Minimum division (d) of the weight value
1: 1
2: 2
3: 5
4: 10
5: 20
6: 50
Weighing capacity of the weighing instrument

1

The decimal point position is the same as
the setting of Calf02.
Range to enable zero adjustment by theZERO key or a command from the CC-Link
master station.
Expressed in percent of the weighing
capacity with the calibration zero point as
the center
Zero tracking time (Unit: second)
When 0.0, zero tracking will not be performed.

20000

Zero tracking band (Unit: 0.1 d)When 0.0, zero tracking will not be performed.
Stability detection time (Unit: second)
When 0.0, stability detection will not be
performed.
Stability detection band (Unit: d)When 0, stability detection will not be
performed.
Tare and zero adjustment when the weightvalue is unstable.
0: Disables both functions.
1: Enables both functions.
Tare when the gross weight is negative.
0: Disables tare.
1: Enables tare.
Standard serial output if the weight value
overflows and is unstable.
0: Disables output.
1: Enables output.

0.0

AD-4408C Weighing Indicator

Page 60

2

0.0

1.0
2
1
1
1

User
setting

Function No.
Parameter or
Setting range

Calf13
1 to 3

Calf14
1 to 2
Calf150 to 1
Calf160 to 1
Calf17-7.00000 to
7.00000
Calf180.00001 to
9.99999
Calf191 to 999999
Calf200 to 1
Calf21
0 to 1
Calf22
1 to 2

Description
Condition to judge over when the grossweight is negative.
A/D negative over or
1: Gross weight < -999999
2: Gross weight < negative weighing capacity
3: Gross weight < -19 dCondition to judge over when the net weightis negative.
A/D negative over or
1: Net weight < -999999
2: Net weight < negative weighing capacity
Select whether or not to clear the zero
value.
0: Disables.
1: Enables.
Select whether or not to perform zero upon
power-ON.
0: Disables.
1: Enables.
Input voltage from a load cell at zero.
X.XXXXX mV/V
Input voltage from a load cell at span
X.XXXXX mV/V
The value of the calibration weightcorresponding to the span input voltage
Select whether or not to output when the
gross weight is negative.
0: Enables output.
1: Disables output.
Select whether or not to restrict
network-related communication.
0: Disables restriction.
1: Enables restriction.
Second header for serial output
1: GS / NT / TR
2: G_ / N_ / T_ (_ space)

Page 61

Default
value

User
setting

1

1

1

0

0.00000
2.00000
20000
0

0

1

AD-4408C Weighing Indicator12. External Dimensions

Unit: mmFig.16 External dimensions

AD-4408C Weighing Indicator

Page 62

MEMO

Page 63

AD-4408C Weighing Indicator

MEMO

AD-4408C Weighing Indicator

Page 643-23-14 Higashi-Ikebukuro, Toshima-ku, Tokyo 170-0013
Telephone: [81] (3) 5391-6132 Fax: [81] (3) 5391-6148

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