AD-4401A
Weighing Indicator

INSTRUCTION MANUAL

1WMPD4003050F

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.

© 2018 A&D Company, Limited. 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, Limited.

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 .......................................................................................................... 6
2. Part Names...................................................................................................................... 7
2.1. Front Panel............................................................................................................... 7
2.2. Rear Panel ............................................................................................................... 8
2.3. Accessories............................................................................................................... 8
3. Installation to Control Panel ............................................................................................. 9
4. Connection to Power Supply ......................................................................................... 10
4.1. AC Power Input Terminal Assignment ................................................................. 10
4.2. Connection Diagram .............................................................................................. 10
5. Connection to Load Cell ................................................................................................ 11
5.1. Load Cell Input Terminal Assignment .................................................................. 11
5.2. Connection Diagram .............................................................................................. 12
6. Calibration ..................................................................................................................... 13
6.1. Calibration Setting .................................................................................................. 13
6.2. Calibration Using Calibration Weights .................................................................. 14
7. Basic Weighing Functions ............................................................................................. 16
8. Batch Weighing Functions ............................................................................................. 19
8.1. Normal Batching ..................................................................................................... 19
8.2. Loss-in-weight Batching ......................................................................................... 228.3. Sequential Weighing Functions ............................................................................. 25
8.4. Simple Comparison Normal Batching ................................................................... 27
8.5. Simple Comparison Loss-in-weight Batching ....................................................... 28
8.6. Simple Comparison Functions............................................................................... 28
9. Check Weighing Functions ............................................................................................ 29
9.1. Check Weighing 1 ................................................................................................. 29
9.2. Check Weighing 2 ................................................................................................. 30
9.3. Check Weighing 3 ................................................................................................. 31
9.4. Check Weighing 4 ................................................................................................. 32
9.5. Check Weighing Functions .................................................................................... 32
10. Control I/O ................................................................................................................... 33
10.1. Pin Assignment .................................................................................................... 33
10.2. Connection Diagram............................................................................................. 34
10.3. Control Input Method ........................................................................................... 35
11. Setpoint Input .............................................................................................................. 36
11.1. Pin Assignment .................................................................................................... 36
11.2. Connection Diagram............................................................................................. 39
Page 3AD-4401A

12. Standard Serial (Current Loop) Output ................................................................................ 40
12.1. Pin Assignment .................................................................................................... 40
12.2. Communication Specifications ............................................................................. 40
12.3. Output Data .......................................................................................................... 41
12.4. Communication Type ........................................................................................... 41
12.5. Output Data Format ............................................................................................. 42
13. Option-01 BCD Output................................................................................................. 44
13.1. Pin Assignment .................................................................................................... 44
13.2. Connection Diagram............................................................................................. 45
13.3. Data Output Timing ............................................................................................. 46
13.4. Data Output Logic and Strobe Output Logic..................................................... 46
14. Option-03 RS-422/485 ................................................................................................. 47
14.1. Terminal Assignment............................................................................................ 47
14.2. Connection Diagram............................................................................................. 47
14.3. Communication Specifications ............................................................................. 49
14.4. Output Data .......................................................................................................... 49
14.5. Communication Type ........................................................................................... 49
14.6. Format When Communication Type (rS F-02) is 1, 2, 3 or 7 ........................ 50
14.7. Format When Communication Type (rS F-02) is 5 or 6 ................................. 52
14.8. Format When Communication Type (rS F-02) is 8 .......................................... 53
14.9. Format When Communication Type (rS F-02) is 4 .......................................... 54
14.10. Modbus-RTU When Communication Type (rS F-02) is 9 .............................. 58
15. Option-04 RS-232C ..................................................................................................... 62
15.1. Pin Assignment .................................................................................................... 62
15.2. Connection Diagram............................................................................................. 63
15.3. Communication Specifications ............................................................................. 63
15.4. Output Data, Communication Type .................................................................... 63
16. Option-07 Analog 4-20mA Output ............................................................................... 64
16.1. Terminal Assignment............................................................................................ 64
16.2. Connection Diagram............................................................................................. 64
16.3. Output Specifications ........................................................................................... 65
16.4. Output Functions .................................................................................................. 65
17. Option-23 Modbus-TCP ............................................................................................... 66
17.1. Pin Assignment .................................................................................................... 66
17.2. Communication Specifications ............................................................................. 66
17.3. IP Address, Subnet mask, Default gateway ...................................................... 67
18. Setpoint Setting ........................................................................................................... 68
18.1. Setting Using Key Switches ................................................................................ 68
18.2. Setpoint Values List ............................................................................................. 70
19. Operation Checking ..................................................................................................... 71
19.1. Checking Key Switches ....................................................................................... 72
19.2. Checking Control Input/Output ............................................................................ 72
19.3. Checking Standard Serial Output ....................................................................... 72
AD-4401A

Page 4

19.4. Checking BCD Output ......................................................................................... 73
19.5. Checking RS-422/485, RS-232C......................................................................... 73
19.6. Checking Setpoint Input ...................................................................................... 73
19.7. Checking Analog 4-20 mA Output ..................................................................... 74
19.8. Checking Load Cell Input.................................................................................... 74
19.9. Checking Software Version ................................................................................. 74
19.10. Checking the Load Cell Connection with a Digital Multimeter....................... 75
19.11. Check List .......................................................................................................... 76
20. Initialization .................................................................................................................. 77
20.1. Parameter Initialization ......................................................................................... 77
20.2. General Function Initialization ............................................................................. 77
20.3. All Data Initialization ............................................................................................ 78
21. Function List ................................................................................................................ 79
21.1. Calibration Function Setting ................................................................................ 79
21.2. General Function Setting ..................................................................................... 81
21.3. Calibration Functions............................................................................................ 83
21.4. Basic Functions .................................................................................................... 85
21.5. Weighing Sequence Functions ............................................................................ 87
21.6. Control Input Functions ....................................................................................... 89
21.7. Control Output Functions..................................................................................... 90
21.8. Standard Serial Output Functions....................................................................... 91
21.9. BCD Output Functions......................................................................................... 91
21.10. RS-422/485, RS-232C Functions ...................................................................... 92
21.11. Setpoint Input Functions .................................................................................... 93
21.12. Analog 4-20 mA Output Functions ................................................................... 93
21.13. Modbus TCP Functions ..................................................................................... 93
22. Specifications .............................................................................................................. 94

Page 5

AD-4401A

1. Safety Precautions

For safe and correct usage, read the following precautions carefully before using the indicator.

Precautions on designing
WARNING● Provide an external safety circuit to the indicator so that the safety of the whole system can be
secured even if errors occur in the external power supply or in the indicator.

Precautions on installation
WARNING● Do not use the indicator in the following environment:- where the temperature and the humidity exceed the specifications- where corrosive gases or flammable gases exist- where the indicator gets wet with oil, chemicals or water
Please note that securing the indicator to the control panel will provide the indicator outside of thecontrol panel the IP65 protection.
● When installing or removing the indicator, be sure to turn off all the external power supplies used
beforehand.

Precautions on wiring
WARNING● When wiring the indicator, be sure to turn off all the external power supplies used beforehand.
● When wiring is complete, be sure to attach the terminal block cover provided with the indicator.
● Be sure to earth ground the indicator.

CAUTION● Do not clamp control wires or communication cables with power lines, or do not place them close topower lines.
● Place the load cell cable sufficiently away from high frequency circuits such as high voltage powerlines and inverter load circuit.

AD-4401A

Page 6

2. Part Names
2.1. Front Panel

8
4

1
3

2
5
9

6
Numerical
Display

Status Display(Upper)Status Display(Lower)

No.
1
2
3

4

5

6

Key Switches

Other

7

8
9

7
Name
Main
Sub
Unit
ZERO
STABLE (MD: Motion detection)
GROSS
NET
HOLD
FUNCTION(FncF-05)
ALARM
Normal batching
Loss-in-weight batching Check weighing
Final weight
Final weight
Near-zero (Z.BAND)Free fall
Free fall
Lo-Lo
Preliminary
Preliminary
Lo
Optional preliminary
Full
Go
Overweight
OverweightHi
Underweight
Underweight
Hi-Hi
Near-zero (Z.BAND)
Near-zero (Z.BAND)
Attach the accessory status label when performing loss-in-weight batchingor check weighing.
CAL (Calibration) key
SETPOINTZERO
TARE
NET/GROSS
Function (FncF-02)
ENTER
ON/OFF
Rating label (Accessory)
Sealing cover

Page 7

AD-4401A

2.2. Rear Panel

1

2

3

4

8
9

6

5

7

No.

Name

1

SETPOINT input connector

2

CONTROL I/O connector

3

SER.OUT (Standard serial output) connector

4

Option slot

5

Load cell input terminal block6

Optional analog 4-20 mA output terminal block7

AC power input terminal block8

Protective conductor terminal

9

Slide rail

2.3. Accessories
Name

AD-4401A

Part Number

Quantity

Terminal block cover1074005384-4

1

Terminal block cover securing screw

11702FN-S3X6

2

Connector for theConnector

1JI361J016-AG

1

CONTROL I/O

Connector cover

1JI360C016-B

1

Connector for the SER.OUT

1JATCP0576

1

Panel mount packing

1064004213A

1

Rubber foot110NO.5837

4

Rating label

1084028304

1

Status label

1083001699

1

Page 8

3. Installation to Control Panel

Make a hole in a control panel as shown below.

68 +1
-0

138 +1-0Panel thickness: 1.6 to 3.2
Unit: mm

Remove the slide rails on both sides and insert the AD-4401A with the accessory panel mount packing
through the hole into the panel.

AD-4401A
Control panel

Panel mount packing

Insert the slide rails from behind.

Slide rails

Page 9AD-4401A

4. Connection to Power Supply
4.1. AC Power Input Terminal Assignment

Use a solderless terminal with a width of 6.2 mm or less.
Terminal No.

Symbol11

Description
Ground terminal
AC power input (Neutral)

12

Earthed conductive partAC power input (Live)

13

Unearthed conductive part4.2. Connection Diagram

Live

NeutralAD-4401A

Page 10

5. Connection to Load Cell
5.1. Load Cell Input Terminal Assignment

Use a solderless terminal with a width of 6.2 mm or less.
Terminal No.

SymbolDescription

1

EXC+

Load cell excitation voltage +

2

SEN+

Sensing input +

3

SEN-

Sensing input -

4

EXC-

Load cell excitation voltage -

5

SIG+

Load cell signal input +

6

SIG-

Load cell signal input -

7

SHLD

Frame ground

Page 11

AD-4401A

5.2. Connection Diagram●6-wire connection

ShieldSensing +Load cell excitation voltage +Load cell signal +Load cell excitation voltage Sensing Load cell signal -●4-wire connection
As shown in the figure below, short-circuit the pins No.1 and No.2, and pins No.3 and No.4.

ShieldLoad cell excitation voltage +Load cell signal +Load cell excitation voltage Load cell signal -AD-4401A

Page 12

6. Calibration

Calibrates the AD-4401A to convert the signal from the load cell to a mass value correctly.

6.1. Calibration Setting
Set the following calibration functions which are required for calibration using calibration weights.
For the function setting procedure, refer to "21.1. Calibration Function Setting".
●Unit: (CALF-01)
Select the unit of the scale.
0: None, 1: g, 2: kg, 3: t, 4: lb (For USA only)●Decimal point position: (CALF-02)
Select the position of a decimal point.
0:0 (No decimal point)

1:

0.0

2:

0.00

3:

0.000

4: 0.0000●Minimum division: (CALF-03)
Set the minimum division of the scale.
1, 2, 5, 10, 20, 50 d
●Maximum capacity: (CALF-04)
Set the maximum weighing capacity of the scale.
0 to 999999
Once the calibration using calibration weights has been completed, the following calibration functions areautomatically set.
●Load cell signal voltage at zero calibration: (CALF-15)●(Load cell signal voltage at span calibration − CALF-15) × CALF-17 / Calibration weight value at spancalibration: (CALF-16)●Maximum capacity at span calibration: (CALF-17)●Calibration weights at span calibration via Modbus: (CALF-23)
Calibration is also performed without calibration weights by setting the load cell signal voltage corresponding
to the calibration weight value (Digital span).

Page 13

AD-4401A

6.2. Calibration Using Calibration Weights
Press the CAL key in the normal mode.

When “CAL" is displayed, press the ENTER key.

When “CAL Set” is displayed, press the ENTER key.

Zero calibration
Press the ENTER key when the STABLE (MD) status
is turned OFF.
Dashes are displayed in the sub-display and zero
calibration is performed.
Note: When the Function key is pressed, the AD4401A proceeds to the span calibration without
performing zero calibration.

Span calibration
Set the calibration weight value in the sub-display.
Press the ENTER key when the STABLE (MD) status
is turned OFF.
Dashes are displayed in the sub-display and spancalibration is performed.
Press the ON/OFF key twice to return to the normal
mode.

AD-4401A

Page 14

Error List
C Err
2
3
4

Description
The load cell signal voltage at zero calibration exceeds 2 mV/V.
Check if unnecessary load is applied to the load cell.
The load cell signal voltage at zero calibration is less than 0 mV/V.
Check if load cell connections of SIG+ and SIG- are not reversed.
The calibration weight value that is set in the span calibration exceeds the maximum capacity.
Set the calibration weight value to less than the maximum capacity.
The calibration weight value that is set in the span calibration is less than the minimum

5

division.
Set the calibration weight value to greater than the minimum division.

7
8

The load cell signal voltage at span calibration is less than that at zero calibration.
Check the load cell wiring.
The load cell signal voltage at span calibration exceeds 3.2 mV/V.
Check if unnecessary load is applied to the load cell.

Page 15

AD-4401A

7. Basic Weighing Functions

When the AD-4401A is powered ON, all the segments of the display turn ON and OFF for checking thedisplay. Then the AD-4401 is in the normal mode and starts weighing.
If the AD-4401A is powered OFF in the OFF mode (with the display OFF), the AD-4401A is in the OFF mode
when powered ON.
For the function setting procedure, refer to "21.1. Calibration Function Setting" and "21.2. General Function
Setting".
●Main display
The contents in the main display in the normal mode are as follows.
- Weight value- Positive overload- Negative overload●Sub-display
Select the function of the sub-display (FncF-04) from the following:
Gross value, Net value, Tare value, Final weight, Total weight, Number of accumulations, Weighing
sequence error●Display OFF (OFF mode)
Turn the display OFF.
Operation: ON/OFF key●Zero setting
The gross value is set to zero when the weight value is within the zero setting range (CALF-05).
Operation: ZERO key, Control input
Setting: Tare and zero setting at unstable weight. (CALF-10)●Zero clear
The zero setting value is cleared.
Operation: Function key (FncF-02), Control input

AD-4401A

Page 16

●Zero tracking
The gross value is set to zero automatically when the zero tracking time (CALF-06) has passed while thegross value is maintained within the zero tracking width (CALF-07).
Note: The function is enabled only when the gross value is within the zero setting range (CALF-05).
●Tare
The current gross value is saved as a tare value and the net value is set to zero.
Operation: TARE key, Control input
Setting: Tare and zero setting at unstable weight (CALF-10) / Tare at negative gross value (CALF-11)●Tare clear
The tare value is cleared.
Operation: Function key (FncF-02), Control input●Gross/Net value selection
The weight value display method is selected, gross value or net value. The GROSS status turns ON when
the gross value is displayed. The NET status turns ON when the net value is displayed.
Operation: NET/GROSS key, Control input●Zero
Center of zero is detected and the ZERO status turns ON when the gross value is within 1/4 of the minimum
division.
●StableStability is detected when the weight value is maintained within the stability detection width (CALF-09) during
the stability detection time (CALF-08). The STABLE (MD) status turns OFF. The control output that is set to“Stable” turns OFF.
●Hold
The weight value is temporarily locked / released. The HOLD status turns ON while the weight value islocked.
Operation: Function key (FncF-02), Control input
Select a hold function (FncF-08) from the following:- Normal hold: The value when the holding operation is performed is locked.
- Peak hold: The maximum value after the holding operation is locked.
Setting: Comparison at hold (FncF-09)

Page 17

AD-4401A

●Manual print
Data is output from the standard serial output or options (BCD, RS-232C, RS-422/485).
Operation: Function key (FncF-02), Control input●Accumulation
The net value is accumulated on the total weight and the number of accumulations is updated.
Operation: Function key (FncF-02), Control input●Total clear
The total weight and the number of accumulations are cleared.
Operation: Function key (FncF-02), Control input●Undoing accumulation
The weight value accumulated last is subtracted from the total weight.
Operation: Function key (FncF-02), Control input●AlarmSelect the condition to turn the ALARM status ON (FncF-10) from the following:- Overload- Total weight / number of accumulations overflow- Zero setting error- Tare error- Weighing sequence error

AD-4401A

Page 18

8. Batch Weighing Functions

Batch weighing is a procedure to automatically weigh the final weight.
Select a weighing mode (CALF-14) from the following:
1: Simple comparison normal batching
2: Simple comparison loss-in-weight batching
3: Normal batching (default)
4: Loss-in-weight batching

8.1. Normal Batching●Weighing start
Operation: Function key (FncF-02), Control input
Setpoint values: Final weight, Free fall, Preliminary, Optional preliminary, Overweight, Underweight, Near-zero

Feeding process
1.

The weighing start input is detected.

2.

When the weighing start input delay time (Sq F-09) has passed, the large flow, medium flow and small
flow outputs turn ON.

3.

When the large flow comparison disable time (Sq F-10) has passed and the net value has exceeded theoptional preliminary value, the large flow output turns OFF.

4.

When the medium flow comparison disable time (Sq F-11) has passed and the net value has exceeded
the preliminary value, the medium flow output turns OFF.

5.

When the small flow comparison disable time (Sq F-12) has passed and the net value has exceeded thefree fall value, the small flow output turns OFF.

6.

When the judging delay time (Sq F-13) has passed and the net value is stable (Sq F-07), the net value
is judged.

End of the feeding process
7.

The weighing end output turns ON and the OK/Over/Under output of the judgment result turns ON.
Setting: OK/Over/Under output timing (Sq F-06)

8.

When the weighing end output time (Sq F-14) has passed, the weighing end output turns OFF and the
OK/Over/Under output of the judgment result turns OFF.

●Discharge start
Operation: Function key (FncF-02), Control input

Discharging process
1.

The discharge start input is detected.

2.

When the discharge start input delay time (Sq F-18) has passed, the discharge output turns ON.

3.

When the gross value is below the near-zero value and the discharge end delay time (Sq F-19) has
passed, the discharge output turns OFF.
Page 19

AD-4401A

●Near-zero
When the weight value is compared with the setpoint and the condition is met, the control output turns ON.
Condition

Control output
Near-zero

Gross value ≤ Near-zeroTiming chart

Judge

Final weight

Overweight

Free fall

Underweight

Preliminary
Optional
Preliminary

Near-zero
Gross
Net

Weighing start input
Large flow output
Medium flow output
Small flow output

T1
T2
T3
T4

Weighing end output

T5
T6

OK/Over/Under output
Discharge start input

T7

Near-zero output
Discharge output

AD-4401A

T8

T1: Weighing start input delay time

T5: Judging delay time

T2: Large flow comparison disable time

T6: Weighing end output time

T3: Medium flow comparison disable time

T7: Discharge start input delay time

T4: Small flow comparison disable time

T8: Discharge end delay time

Page 20

●Correction flow
When the judgment result after the feeding process is underweight, the following is automatically performed
up to the maximum number of correction flow (Sq F-08) to compensate for the underweight value.
1.

When the net value is judged to be underweight, the small flow output turns ON.

2.

When the correction flow ON time (Sq F-16) has passed, the small flow output turns OFF.

3.

When the correction flow OFF time (Sq F-17) has passed and the net value is stable (Sq F-07), the net
value is judged.

Timing chart
Overweight
Final weight
Free fall

Judge

Underweight

Judge
Judge

Small flow output

T5

T10

T10
T9

T9

Weighing end output
OK/Over/Under output
T5: Judging delay time
T9: Correction flow ON time
T10: Correction flow OFF time

Page 21

AD-4401A

8.2. Loss-in-weight Batching●Weighing start
Operation: Function key (FncF-02), Control input
Setpoint values: Final weight, Free fall, Preliminary, Full, Overweight, Underweight, Near-zero

Feeding process
1.

The weighing start input is detected.

2.

When the weighing start input delay time (Sq F-09) has passed, the medium flow and small flow outputs
turn ON.

3.

When the medium flow comparison disable time (Sq F-11) has passed and the – net value has become
below the preliminary value, the medium flow output turns OFF.

4.

When the small flow comparison disable time (Sq F-12) has passed and the – net value has exceeded
the free fall value, the small flow output turns OFF.

5.

When the judging delay time (Sq F-13) has passed and the net value is stable (Sq F-07), the net value
is judged.

End of the feeding process
6.

The weighing end output turns ON and the OK/Over/Under output of the judgment result turns ON.
Setting: OK/Over/Under output timing (Sq F-06)

7.

When the weighing end output time (Sq F-14) has passed, the weighing end output turns OFF and the
OK/Over/Under output of the judgment result turns OFF.

●Near-zero and full
When the weight value is compared with the setpoint and the condition is met, the control output turns ON.
Condition

Control output

Net value ≤ Near-zero

Near-zero

Gross value ≥ Full

Full

AD-4401A

Page 22

Timing chart

Preliminary
Final weight

Judge

Underweight

Free fall

Overweight
Weighing start input
Medium flow output
Small flow output

T1
T2
T3

T4

Weighing end output

T5

OK/Over/Under output
T1: Weighing start input delay time
T2: Medium flow comparison disable time
T3: Small flow comparison disable time
T4: Judging delay time
T5: Weighing end output time

Page 23

AD-4401A

●Correction flow
When the judgment result after the feeding process is underweight, the following is automatically performed
up to the maximum number of correction flow (Sq F-08) to compensate for the underweight value.
1.

When the net value is judged to be underweight, the small flow output turns ON.

2.

When the correction flow ON time (Sq F-16) has passed, the small flow output turns OFF.

3.

When the correction flow OFF time (Sq F-17) has passed and the net value is stable (Sq F-07), the net
value is judged.

Timing chart

Judge
Judge

Free fall

Judge

Underweight

Final weight
Overweight

Small flow output

T5

T10

T10
T9

T9

Weighing end output
OK/Over/Under output
T5: Judging delay time
T9: Correction flow ON time
T10: Correction flow OFF time

AD-4401A

Page 24

8.3. Sequential Weighing Functions●Automatic free fall correction
Under the following conditions, the correct free fall value is automatically set.
- The weight value after the feeding process is within the final value ± automatic free fall correction
range (Sq F-04).
- The minimum small flow time for the automatic free fall correction (Sq F-05) has passed.
Select an automatic free fall correction method (Sq F-03) from the following.
- Moving average of last four weighings- Fuzzy●Automatic accumulation
When the weighing end output turns ON after the feeding process, the weight value is accumulated on the
total weight.
Select the condition to perform the automatic accumulation (SqF-02) from the following.
- Accumulates only when the judgment result is OK.
- Accumulates regardless of the judgment result.
●Automatic print
When the weighing end output turns ON after the feeding process, data is output from the standard serial
output (Si F-02) or options (bCdF-02, rS F-02).
●Emergency stop
The large flow, medium flow and small flow outputs turn OFF, the weighing sequence error output turns ON
and the indicator waits for the next weighing start input.
Operation: Function key (FncF-02), Control input●Flow timeout error/Discharge timeout error
When the duration from the flow output ON to the weighing end output ON has exceeded the flow timeout
time (Sq F-15), the large flow, medium flow and small flow outputs turn OFF and the weighing sequenceerror output turns ON
When the duration from the discharge output ON to the weight value becoming near-zero has exceeded thedischarge timeout time (Sq F-20), the discharge output turns OFF and the weighing sequence error output
turns ON.

Page 25

AD-4401A

●Weighing sequence errors
When a sequence error is detected, the detected sequence number is displayed in the sub-display. (FncF-04)

Current sequence number
Number of the sequence in which an error is detected.
Sequence No.
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
30
31
32
33
34
35
50
51
52
53
54
55

AD-4401A

Description
Waits for the weighing start input.
Automatic tare
Weighing start input delay time (1 s) after automatic tare
Starts the weighing start input delay.
Compares the weight value with the setpoint.
Waits for the weighing start input delay time to pass.
Turns the large flow/medium flow/small flow outputs ON.
Waits for the large flow comparison disable time to pass.
Waits for the weight value to exceed the optional preliminary value.
Turns the large flow output OFF and waits for the medium flow comparison disable time
to pass.
Waits for the weight value to exceed the preliminary value.
Turns the medium flow output OFF and waits for the small flow comparison disable time
to pass.
Waits for the weight value to exceed the free fall value.
Waits for the judging delay time to pass.
Waits for the weight value to be stable.
Judges if the correction flow is required.
Judges the weight value.
Waits for the weight value to be near-zero.
Starts the correction flow.
Turns the small flow output ON for correction.
Waits for the correction flow ON time to pass and turns the small flow output OFF.
Waits for the correction flow OFF time to pass.
Judges the correction flow value.
Ends the correction flow.
Waits for the discharge start input.
Waits for the discharge start input delay time to pass.
Turns the discharge output ON.
Waits for the weight value to be below the near-zero value.
Waits for the discharge end delay time to pass.
Turns the discharge output OFF.

Page 26

8.4. Simple Comparison Normal Batching
When the weight value is compared with the setpoint and the condition is met, the control output turns ON.
Condition

Control output

Gross value ≤ Near-zero

Near-zero

Net value ≥ Final - Optional preliminary

Large flow

Net value ≥ Final - Preliminary

Medium flow

Net value ≥ Final - Free fall

Small flow

Net value > Final - Underweight

UnderweightNet value > Final + Overweight

Overweight

Final + Overweight ≥ Net value ≥ Final - UnderweightOK

Timing chart
Overweight
Final weight

Free fall

Underweight

Preliminary
Optional
preliminary

Near-zero
Gross
Net

Large flow output
Medium flow output
Small flow output
Under output
OK output
Over output
Near-zero output

Page 27

AD-4401A

8.5. Simple Comparison Loss-in-weight Batching
When the weight value is compared with the setpoint and the condition is met, the control output turns ON.
Condition

Control output

Weight value ≤ Near-zero

Near-zero

Gross value ≥ Full

Full

–Net value ≥ Final - Preliminary

Medium flow

–Net value ≥ Final - Free fall

Small flow

–Net value < Final - Underweight

Underweight–Net value > Final + Overweight

Overweight

Final + Overweight ≥ -Net value ≥ Final - UnderweightOK

Timing chart

Preliminary

Underweight

Free fall

Final weight

Overweight

Medium flow output
Small flow output
Under output
OK output
Over output

8.6. Simple Comparison Functions●Automatic print
When the weight value is five times the minimum division or more and the large flow, medium flow and small
flow outputs turn ON, data is output once from the standard serial output or options. To output again, wait for
the –weight value to be four times the minimum division or less.

AD-4401A

Page 28

9. Check Weighing Functions

Check weighing separates the weight values into a maximum of five stages.
Select a weighing mode (CALF-14) from the following.
5: Check weighing 1
6: Check weighing 2
7: Check weighing 3
8: Check weighing 4

9.1. Check Weighing 1
When the weight value is compared with the setpoint and the condition is met, the control output turns ON.
Condition

Control output

Gross value ≤ Near-zero

Near-zero

Net value > Hi-Hi limit

Hi-Hi

Net value > Target + Hi limit

Hi

Target + Hi limit ≥ Net value ≥ Target - Lo limit

Go

Net value < Target - Lo limitLo

Net value < Lo-Lo limit

Lo-Lo

Timing chart
Hi-Hi limit
Target + Hi limit
TargetTarget - Lo limit
Lo-Lo limit
Near-zero
Gross
Net

Hi-Hi output
Hi output
Go output
Lo output
Lo-Lo output
Near-zero output

Page 29

AD-4401A

9.2. Check Weighing 2
When the weight value is compared with the setpoint and the condition is met, the control output turns ON.
Condition

Control output

Gross value ≤ Near-zero

Near-zero

Net value > Target + Hi-Hi limit

Hi-Hi

Target + Hi-Hi limit ≥ Net value > Target + Hi limit

Hi

Target + Hi limit ≥ Net value ≥ Target - Lo limit

Go

Target - Lo limit > Net value ≥ Target - Lo-Lo limitLo

Net value < Target + Lo-Lo limit

Lo-Lo

Timing chart

Target + Hi-Hi limit
Target + Hi limit
TargetTarget + Lo limit
Target + Lo-Lo
Near-Zero
Gross
Net

Hi-Hi output
Hi output
Go output
Lo output
Lo-Lo output
Near-zero output

AD-4401A

Page 30

9.3. Check Weighing 3
When the weight value is compared with the setpoint and the condition is met, the control output turns ON.
Condition

Control output

Gross value ≤ Near-zero

Near-zero

Net value > Hi-Hi limit

Hi-Hi

Net value > Hi limit

Hi

Hi limit ≥ Net value ≥ Lo limit

Go

Net value < Lo limitLo

Net value < Lo-Lo limit

Lo-Lo

Timing chart

Hi-Hi limit
Hi limit
Lo limit
Lo-Lo limit
Near zero
Gross
Net

Hi-Hi output
Hi output
Go output
Lo output
Lo-Lo output
Near-zero output

Page 31

AD-4401A

9.4. Check Weighing 4
When the weight value is compared with the setpoint and the condition is met, the control output turns ON.
Condition

Control output

Gross value ≤ Near-zero

Near-zero

Net value > Hi-Hi limit

Hi-Hi

Hi-Hi limit > Net value ≥ Hi limit

Hi

Hi limit > Net value ≥ Lo limit

Go

Lo limit > Net value ≥ Lo-Lo limitLo

Net value < Lo-Lo limit

Lo-Lo

Timing chart

Hi-Hi limit
Hi limit
Lo limit
Lo-Lo limit
Near-Zero
Gross
Net

Hi-Hi output
Hi output
Go output
Lo output
Lo-Lo output
Near-zero output

9.5. Check Weighing Functions●Automatic print
When the weight value is five times the minimum division or more and is stable, data is output once from thestandard serial output or options. To output again, wait for the weight value to be four times the minimum
division or less.
AD-4401A

Page 3210. Control I/O
10.1. Pin Assignment

B1

B8

A1

A8

Connector for the Control I/O
Connector:

OTAX N361J016AU (A&D Part No.: 1JI361J016-AG)

Connector Cover: OTAX N360C016B (A&D Part No.: 1JI360C016-B)
Pin No.

Description

Description

Pin No.

A1

Control input

Control output

B1

A2

Control input

Control output

B2

A3

Control input

Control output

B3

A4

Control input

Control output

B4

A5

Control input

Control output

B5

A6

Control input

Control output

B6

A7

Input common

Control output

B7

A8

Output common

Control output

B8

Page 33

AD-4401A

10.2. Connection Diagram
12 V
680 Ω

Internal
Circuit

3.3 kΩA1

A6
A7

Control input- ON voltage: 5 V or less- ON current: 3 mA or more
- OFF current: 1 mA or lessInternal

B1

Circuit

B8

3.3 kΩ

A8

Control output- Maximum load voltage: 30 VDC- Maximum load current: 50 mA/point- Voltage drop at ON: 1 V or less
- Leakage current at OFF: 0.1 mA or lessAD-4401A

Page 34

10.3. Control Input Method
Two methods of control input are available; edge detection and level detection.

Edge detection
Control input is performed when the control input is turned ON (short-circuit) from the OFF state (opencircuit).
The pulse width is 50 ms or more.
ON
OFF
Pulse width: 50 ms or more

Level detection
Control input is performed while the control input is ON (short-circuit).
ON
ReleaseHold

ReleaseOFF

Page 35

AD-4401A

11. Setpoint Input

Setpoints are set using the setpoint input from external devices.
Setpoints that cannot be set using the setpoint input are set using key switches.

11.1. Pin Assignment

B1

B12

A1

A12

Connector for the setpoint
Connector:

OTAX N361J024AU (A&D Part No.: 1JI361J024-AG)

Connector cover: OTAX N360C024B (A&D Part No.: 1JI360C024-B)
The connector is not provided and must be prepared by the user.
The descriptions of the pin Nos. depend on the weighing mode (CALF-14) and the setpoint setting method(SP F-01) settings.
In addition, when the minimum division (CALF-03) is 10 d or more, the setpoint will be ten times the setting
value.
Weighing mode = Normal batching, Loss-in-weight batching, Simple comparison normal batching, Simple
comparison loss-in-weight batching
Setpoint setting method = 5-digit input from external devices
Pin No.

Description

Description

Pin No.

A1

BCD input 1

NC

B1

A2

BCD input 2

NC

B2

A3

BCD input 4

NC

B3

A4

BCD input 8

NC

B4

A5

Final weight 10^0

NC

B5

A6

Final weight 10^1

NC

B6

A7

Final weight 10^2

NC

B7

A8

Final weight 10^3

NC

B8

A9

Final weight 10^4

NC

B9

A10

NC

NC

B10

A11

NC

NC

B11

A12

NC

ShieldB12AD-4401A

Page 36

Weighing mode = Normal batching, Loss-in-weight batching, Simple comparison normal batching, Simple
comparison loss-in-weight batching
Setpoint setting method = 16-digit input from external devices
Pin No.

Description

Description

Pin No.

A1

BCD input 1

Preliminary 10^0

B1

A2

BCD input 2

Preliminary 10^1

B2

A3

BCD input 4

Preliminary 10^2

B3A4BCD input 8

Preliminary 10^3

B4

A5

Final weight 10^0Overweight 10^0

B5

A6

Final weight 10^1

Overweight 10^1

B6

A7

Final weight 10^2

Underweight 10^0

B7

A8

Final weight 10^3

Underweight 10^1

B8

A9

Final weight 10^4

NC

B9

A10

Free fall 10^0

NC

B10

A11

Free fall 10^1

NC

B11

A12

Free fall 10^2

ShieldB12

Weighing mode = Check weighing 1, Check weighing 2
Setpoint setting method = 16-digit input from external devices
Pin No.

Description

Description

Pin No.

A1

BCD input 1

Hi limit 10^3

B1

A2

BCD input 2

Hi limit 10^4B2A3BCD input 4

Lo limit 10^0

B3A4

BCD input 8

Lo limit 10^1

B4A5

Target 10^0

Lo limit 10^2

B5

A6

Target 10^1

Lo limit 10^3

B6A7

Target 10^2

Lo limit 10^4B7A8Target 10^3

NC

B8

A9

Target 10^4

NC

B9

A10

Hi limit 10^0

NC

B10

A11

Hi limit 10^1

NC

B11

A12

Hi limit 10^2

ShieldB12Page 37

AD-4401A

Weighing mode = Check weighing 3
Setpoint setting method = 16-digit input from external devices
Pin No.

Description

Description

Pin No.

A1

BCD input 1

Hi limit 10^3

B1

A2

BCD input 2

Hi limit 10^4B2A3BCD input 4

Lo limit 10^0

B3A4

BCD input 8

Lo limit 10^1

B4

A5

NC

Lo limit 10^2

B5

A6

NC

Lo limit 10^3

B6

A7

NC

Lo limit 10^4

B7

A8

NC

NC

B8

A9

NC

NC

B9

A10

Hi limit 0^0

NC

B10

A11

Hi limit 10^1

NC

B11

A12

Hi limit 10^2

ShieldB12

Weighing mode = Check weighing 4
Setpoint setting method = 16-digit input from external devices
Pin No.

Description

Description

Pin No.

A1

BCD input 1

Lo limit 10^0

B1

A2

BCD input 2

Lo limit 10^1

B2

A3

BCD input 4

Lo limit 10^2

B3A4BCD input 8

Lo limit 10^3B4A5Hi-Hi limit 10^0Lo-Lo limit 10^0

B5

A6

Hi-Hi limit 10^1

Lo-Lo limit 10^1

B6

A7

Hi-Hi limit 10^2

Lo-Lo limit 10^2

B7A8Hi-Hi limit 10^3

Lo-Lo limit 10^3B8A9Hi limit 10^0

NC

B9

A10

Hi limit 10^1

NC

B10

A11

Hi limit 10^2

NC

B11

A12

Hi limit 10^3

ShieldB12AD-4401A

Page 38

11.2. Connection Diagram
Setpoint input is 4x16 key matrix input.

Internal
circuit

5V
680 Ω
1 kΩ

A1

A2

A3

A4

A5

B8

Key scan output- Voltage drop at ON: 1 V or less
- Leakage current at OFF: 0.1 mA or lessKey scan input- ON voltage: 1 V or less- ON current: 3 mA or more
- OFF current: 1 mA or lessPage 39

AD-4401A

12. Standard Serial (Current Loop) Output
12.1. Pin Assignment

4

2

5

1

3
6

7

Connector for the standard serial (current loop) output
Connector: Hosiden TCP0576-715267 (A&D Part No.: 1JATCP0576)
Pin No.

Description

1

NC

2

Frame ground3

Current loop output

4

NC

5

Current loop output

6

NC

7

NC

Shell

No sign
No sign

Frame ground12.2. Communication Specifications
Signal level

Current loop 0 to 20 mA

Baud rate (Si F-03)

600, 2400 bps

Character bit length

7 bitsParityEven

Star bit length

1 bit

Stop bit length

1 bit

Code

ASCII

Terminator

CR LF

AD-4401A

Page 40

12.3. Output Data
Select an output data (Si F-01) from the following:
1: Displayed weight value (default)
2: Gross value
3: Net value
4: Tare value
5: Gross value + Net value + Tare value
6: Total weight
7: Number of accumulations
8: Total weight and number of accumulations

12.4. Communication Type
Select a communication Type (Si F-02) from the following:
1: Interval output at the display update rate (FncF-03) (default)
2: In synchronization with automatic print
3: In synchronization with manual print
4: In synchronization with automatic/manual accumulation

Page 41

AD-4401A

12.5. Output Data Format●Gross value, net value, tare value
Header 1

Header 2

Output weight
value

Unit

Terminator

3 chars

3 chars

8 chars

2 chars

2 chars/1 char

Item
Header 1

Value
ST,

StableUS,

Unstable

OL,

Overload

GS,

Gross value

NT,

at CALF19=1

Net value

Header 2

TR,

Tare value(Si F-01)

G SP ,

Gross value

N SP ,

at CALF19=2

Net value

T SP ,Tare value+0012.34

Figure with a sign

Output weight value+00000000(Si F-01)+ SP SP SP SP . SP SP

Positive overload- SP SP SP SP . SP SP

Negative overload

SP SP

None

SP g

g

kg

kg

SP t

t

Unit (CALF-01)

No unit is added when the number of accumulations is output.
SP: space

AD-4401A

Page 42

●Total weight, Number of accumulations
Header 2

Output weight
value

Unit

Terminator

3 chars

11 chars

2 chars

2 chars/1 char

Item

Value

Header 2

TW,

Total weight(Si F-01)

TN,

Number of accumulations+0000012.34

Figure with a sign

Output weight value+0000000000

0(Si F-01)+ SP SP SP SP SP SP SP . SP SP

Positive overload- SP SP SP SP SP SP SP . SP SP

Negative overload

SP SP

None

SP g

g

kg

kg

SP t

t

Unit (CALF-01)

No unit is added when the number of accumulations is output.
SP: space

Page 43

AD-4401A

13. Option-01 BCD Output
13.1. Pin Assignment

B1

B20

A1

A20

Connector for the Option-01 BCD output
Connector:

OTAX N361J040AU (A&D Part No.: 1JI361J040-AG)

Connector cover: OTAX N360C040B (A&D Part No.: 1JI360C040-B)
Pin No.
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12

Description
1
4
10
40
100
400
1000
4000
10000
40000
100000400000Description
2
8
20
80
200
800
2000
8000
20000
80000
200000800000
ON: Positive
OFF: Negative
ON: Net value
OFF: Gross or Tare value

A13

OFF: Overload

A14

ON: Stable

A15

Decimal point position
A15=ON,
B15=ON,
A16=ON,
B16=ON:
A15=OFF, B15=ON,
A16=ON,
B16=ON:
A15=ON,
B15=OFF, A16=ON,
B16=ON:
A15=ON,
B15=ON,
A16=OFF, B16=ON:
A15=ON,
B15=ON,
A16=ON,
B16=OFF:Unit
A17=OFF, B17=OFF: None or kg
A17=ON,
B17=ON:g
A17=OFF, B17=ON:t
A17=ON
B17=OFF: lb (For USA only)
Strobe output
Hold input
CommonCommonFrame ground
Frame ground

A16

A17
A18
A19
A20

None
0.0
0.00
0.000
0.0000Pin No.
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
B15
B16

B17
B18
B19
B20

When the weight value is overloaded and the data output logic (bCdF-03) is set to negative logic (default), allof the output data is turned ON.

AD-4401A

Page 4413.2. Connection Diagram
Internal
circuit

A1

A18
B1

B17

680 Ω

5V
1 kΩ

B18
A19
B19

Data output, Strobe output- Maximum load voltage:

30 VDC- Maximum load current:

50 mA/point- Voltage drop at ON:

1 V or less

- Leakage current at OFF: 0.1 mA or less
Hold input- ON voltage:

1 V or less- ON current:

3 mA or more

- OFF current:

1 mA or lessPage 45

AD-4401A

13.3. Data Output Timing
Select a data output timing (bCdF-02) from the following:
1: Interval output at the display update rate (FncF-03) (default)
2: In synchronization with automatic print
3: In synchronization with manual print

Timing chart

Valid data output width

Data output
Strobe output
Strobe output width
Hold input

50 ms

50 ms

The valid data output width is twice the strobe output width. Read the data within the valid data output width.
The strobe output width depends on the display update rate (FncF-03).
Display update rate

Strobe output width- 20 times/s 20 ms- 10 times/s 45 ms- 5 times/s

95 ms

Update will stop within 50 ms after the hold input turns ON. Then, update will restart within 50 ms after thehold input turns OFF.

13.4. Data Output Logic and Strobe Output Logic
Select a data output logic (bCdF-03) and a strobe output logic (bCdF-04) from the following:
1: Positive logic
2: Negative logic (default)

AD-4401A

Page 46

14. Option-03 RS-422/485
14.1. Terminal Assignment

Terminal No.

Description

1

Send data +2

Send data -3

Receive data +4

Receive data -56Open-circuit:

Disable the terminal resistor

Short-circuited to No. 4

Enable the terminal resistor

Signal ground14.2. Connection Diagram
14.2.1. RS-422
AD-4401A

Master

1 Send data +2 Send data 3 Receive data +4 Receive data -100 Ω

5 Terminal resistor
6 Signal ground

Page 47

AD-4401A

14.2.2. 2-wire RS-485
Short-circuit the terminals No.1 and No.3, and the terminals No.2 and No.4 as shown below.
Terminal resistors must be installed on both ends of the circuit.
When a multidrop connection is required, refer to “Multidrop connection” in “14.9. Format When
Communication Type (rS F-02) is 4”.
AD-4401A(Slave address 1)
1

Master2
3
4
5
6

AD-4401A(Slave address 2)
1
2
3
4
5
6

AD-4401A(Slave address 3)
1
2
3
4

100 Ω

5
6

AD-4401A

Page 48

14.3. Communication Specifications
Signal level (rS F-08, rS F-09)

RS-422/RS-485 compliant

Baud rate (rS F-03)

600, 1200, 2400, 4800, 9600, 19200, 38400, 115200 bps

Character bit length (rS F-05)

7, 8 bits

Parity (rS F-04)

None, Odd, Even

Start bit length

1 bit

Stop bit length (rS F-06)

1, 2 bits

Code

ASCII, Binary (for Modbus-RTU）

Terminator (rS F-07)

CR LF, CR

14.4. Output Data
Select an output data (rS F-01) from the following:
1: Displayed weight value (default)
2: Gross value
3: Net value
4: Tare value
5: Gross value + Net value + Tare value
6: Total weight
7: Number of accumulations
8: Total weight and number of accumulations

14.5. Communication Type
Select a communication type (rS F-02) from the following:
1: Interval output at the display update rate (FncF-03) (default)
2: In synchronization with automatic print
3: In synchronization with manual print
4: Write data or read setpoint values by commands from the master5: Interval output of comparison result and gross value at 100 times/s.
6: Interval output of comparison result and net value at 100 times/s.
7: In synchronization with automatic/manual accumulation
8: Interval output at 100 times/s
9: Modbus-RTU (available for the software version 1.03 or later)

Page 49

AD-4401A

14.6. Format When Communication Type (rS F-02) is 1, 2, 3 or 7
●Data format (Gross value, Net value, Tare value)
Header 1

Header 2

Output weight
value

Unit

Terminator

3 chars

3 chars

8 chars

2 chars

2 chars/1 char

Item
Header 1

Value
ST,

StableUS,

Unstable

OL,

Overload

GS,

Gross value

NT,

at CALF19=1

Net value

Header 2

TR,

Tare value(Si F-01)

G SP ,

Gross value

N SP ,

at CALF19=2

Net value

T SP ,Tare value+0012.34

Figure with a sign

Output weight value+00000000(Si F-01)+ SP SP SP SP . SP SP

Positive overload- SP SP SP SP . SP SP

Negative overload

SP SP

None

SP g

g

kg

kg

SP t

t

Unit (CALF-01)

No unit is added when the number of accumulations is output.
SP: space

AD-4401A

Page 50

●Data format (Total weight, Number of accumulations)
Header 2

Output weight
value

Unit

Terminator

3 chars

11 chars

2 chars

2 chars/1 char

Item

Value

Header 2

TW,

Total weight(Si F-01)

TN,

Number of accumulations+0000012.34

Figure with a sign

Output weight value+0000000000

0(Si F-01)+ SP SP SP SP SP SP SP . SP SP

Positive overload- SP SP SP SP SP SP SP . SP SP

Negative overload

SP SP

None

SP g

g

kg

kg

SP t

t

Unit (CALF-01)

No unit is added when the number of accumulations is output.
SP: space

Page 51

AD-4401A

14.7. Format When Communication Type (rS F-02) is 5 or 6
●Data format (Comparison result + Weight value)Comparison

Gross value/Net value/

resultOutput weight value

2 chars

6 chars

Terminator
2 chars/1 char

Item

Value

Comparison resultFF*1

Gross value (rS F-02=5)
Net value (rS F-02=6)
Output weight value (rS F-01)

00007F*2*1: Comparison results are converted from 8 binary digits into 2 hexadecimal digits.
2 hexadecimal digits
161
8 binary digits
27

26

25

24

160

0: OFF 1: ON
23
22
21

20

Near-zero
Underweight/Hi-Hi
Overweight/Hi
Large flow/Go
Medium flow/Lo
Small flow/Lo-Lo
Discharge
Weighing end*2: The gross value and the net value are converted from a signed decimal number into a 6-digit
hexadecimal number. Negative numbers are represented by the two's complement. A decimal point is
not included.
Decimal
…
+127
…
2
1
0
-1
-2
…
-127
…

AD-4401A

Hexadecimal…
00007F…
000002000001000000FFFFFF
FFFFFE…
FFFF81…

Page 52

14.8. Format When Communication Type (rS F-02) is 8
●Data format (Weight value)
Slave address

Output weight value

Terminator

3 chars

8 chars

2 chars/1 char

Item

Value
+0001234

Figure with a sign

Output weight value+0000000

0(rS F-01)+ SP SP SP SP . SP SP

Positive overload- SP SP SP SP . SP SP

Negative overload

A decimal point is not added to the output weight value.

Page 53

AD-4401A

14.9. Format When Communication Type (rS F-02) is 4
●Data format (Command)
Slave address

Command

Terminator

2 chars

2 chars

2 chars / 1char

Item
Command

Value

RW

RF

Read weight data
Read comparison result + gross value
Read comparison result + net value
Read net value at weighing end

RTRead total weight + number of accumulations

RS

Read setpoint values

MZ

Zero setting

MT

Tare

CT

Tare clear

DT

Total clear

MG

Display gross value in the main display

MN

Display net value in the main display

BB

Weighing start

BD

Discharge start

HB

Emergency stopSS

Write setpoint values

RB●Weight data format
Data format is the same as that when communication type (rS F-02) is 1, 2, 3 or 7.
Refer to “14.6. Format When Communication Type (rS F-02) is 1, 2, 3 or 7” for the weight data format.

AD-4401A

Page 54

●Data format (Setpoint values)
Setpoint data format depends on the weighing mode (CALF-14).
Normal batching / Simple comparison normal batching: (CALF-14

1, 3)

Final
weightFree
fall

Preliminary

Optional
preliminary

Overweight

Underweight

NearzeroTerminator

6 chars

6 chars

6 chars

6 chars

6 chars

6 chars

6 chars

2 chars/1charLoss-in-weight batching / Simple comparison loss-in-weight batching: (CALF-14

2, 4)

Final
weightFree
fall

Preliminary

Full

Overweight

Underweight

NearzeroTerminator

6 chars

6 chars

6 chars

6 chars

6 chars

6 chars

6 chars

2 chars/1charCheck weighing 1/2/3/4: (CALF-14

5, 6, 7, 8)

TargetweightHi-Hi limit

Hi limit

Lo limit

Lo-Lo limit-

NearzeroTerminator

6 chars

6 chars

6 chars

6 chars

6 chars

6 chars

6 chars

2 chars/1charItem

Value (e.g. Unit = kg, Decimal point position = 0.000)

Final weight/Target

02000020.000 kg

Free fall/Hi-Hi limit

0001000.100 kg

Preliminary/Hi limit

0020000.200 kg

Optional preliminary/Full/Lo limit

01800018.000 kg

Overweight/Lo-Lo limit

0000200.020 kg

Underweight0000200.020 kg

Near-zero

0002000.200 kgPage 55

AD-4401A

●Multidrop connection
When a master and some AD-4401As are connected by a 1:n multidrop connection, a different slave
address (rSF-09) is assigned to each AD-4401A. When the master sends a command by adding the slave

address (@ 0 1 to @ 9 9) at the beginning, the AD-4401A with the matching slave address sends a
response by adding the slave address (@ 0 1 to @ 9 9) at the beginning.
Master

@ 0 1 R W CR LF

Slave AddressrS@ 0 1 R W CR LF@ 0 1 Readoutdata

F-09 = 01

Slave AddressrS@ 0 2 Readoutdata

F-09 = 02●Communication diagram
Three communication diagrams are shown below.

Reading data
R W : Read weight data
R B : Read comparison result + gross value, Read comparison result + net value
R F : Read net value at weighing end
R T : Read total weight + number of accumulations
R S : Read setpoint values
When the command above is sent, the corresponding data is sent in response.
Master
AD-4401A

AD-4401A

Command
Readout data

Page 56

Function commands
M Z : Zero setting
M T : TareC T : Tare clear
D T : Total clear
M G : Display gross value in the main display
M N : Display net value in the main display
B B : Weighing start
B D : Discharge start
H B : Emergency stop
When the command above is sent, the command is echoed back and is executed.

MasterCommandAD-4401A
Command

Writing setpoint values
When writing setpoint values, set the setpoint setting method (SP F-01) to 0 (Setpoint input not used).
S S : Write setpoint values
When the command above is sent, the command is echoed back.
Then, when setpoint data is sent, the data is echoed back and saved.

Master
AD-4401A

Command

Written data
Command

Written data

Error response
I E : Response to the mode that does not accept commands
V E : Response to data whose format is correct but whose value is out of range? E : Response to illegal commands/formats

Page 57

AD-4401A

14.10. Modbus-RTU When Communication Type (rS F-02) is 9
Modbus-RTU is available for the software version 1.03 or later.
When the communication type (rS F-02) is set to 9: Modbus-RTU, communication settings are as thefollowing.
ParityEven

Character bit length

8 bitsStop bit length

1 bit

RS-422/485 electrical specifications

2-wire RS-485

For the 2-wire RS-485 connection method, refer to the connection diagram in "14.2.2. 2-wire RS-485".
Select a baud rate and a slave address from the following:rS F-

Setting value

Item

Default

5: 9600 bps
03

Baud rate

6: 19200 bps
7: 38400 bps

5

8: 115200 bps
09

RS-422/485 slave address

1 to 99

Function code and maximum quantity
Code

Function nameMaximum quantity

01

Read coils

100

03

Read holding registers

100

05

Write single coil

1

06

Write single register

1

15

Write multiple coils

1

16

Write multiple registers

100

AD-4401A

Page 58

0●Data address
R/
Item
Data addressW
000001
Near-zero
000201000002
Underweight000202000003
Overweight000203000004OK000204000005Large flow
000205000006
Medium flow
000206000007
Small flow
000207000008Discharge
000208000009Weighing end
000209000010Full
000210000011Hi-Hi
000211000012
Hi
000212000013
Go
000213R Lo
000014000214000015Lo-Lo000215000016
Stable000216000017Gross (0)/Net (1) display
000217000018In weighing sequence
000218000019Weighing sequence error
000219000020Overload
000220000021
When zero setting fails
000022
When tare fails
000023
Total weight overflow
000221-000300
000024
Number of accumulations overflow
000025-000100
Reserved internally
Data address

000101-000200

Reserved internally

R/
Item
W
Zero setting
Tare
Weighing start
Emergency stop
Discharge start
Manual free fall correction
Tare clear
Accumulation
Undoing accumulation
Total clear
Print
Zero clear
W
Display Gross*1
Display Net
Pause
Weighing restart
Forced weighing end
Forced discharge end
Error clear
Manual correction flow
Reserved internallyR/
Reserved internallyW
000401
Zero calibration
W
000402
Span calibration*2*1000403-000500
Reserved internally000301-000400*1: When "1" is written, the operation is executed.
*2: Before span calibration, set CALF-23 Calibration weights at span calibration via Modbus (400145-400146).

Page 59

AD-4401A

Data address (*1)
400001-400002
400003-400004
400005-400006
400007-400008
400009-400010
400011-400012
400013-400014
400015-400016
400017-400018
400019-400020
400021-400022
400023-400024
400025-400026
400027-400096
400095-400096
400097-400098
400099-400100
400101-400146
400147-400200
400201-400202
400203-400204
400205-400206
400207-400208
400209-400210
400211-400212
400213-400214
400215-400216
400217-400218
400219-400220
400221-400222
400223-400224
400225-400226
400227-400300
400301-400400
400401-400500
400501-400600
400601-400700
400701-400800
400801-400900
400901-401000
401001-401100
401101-401200
401201-401400

R/W

R

R/W

R/W

R/W

Item
Displayed weight value
Gross value
Net value
Tare value
Status display (*2)
Sub-display
Total weight
Number of accumulations
Gross value at weighing end
Net value at weighing end
Tare value at weighing end
Sequence number
Sequence error number
Reserved internally
Voltage ratio (nV/V) (*3)
Access interval timer (ms)During an internal write cycle / Write result (*4)
Calibration functions (*5)
Reserved internally
Setpoint Final weight
Setpoint Free fall
Setpoint Preliminary
Setpoint Optional preliminary
Setpoint Overweight
Setpoint Underweight
Setpoint Full
Setpoint Near-zero
Setpoint Go
Setpoint Hi
Setpoint Lo
Setpoint Hi-Hi
Setpoint Lo-Lo
Reserved internally
Basic functions (*5)
Sequence functions (*5)
Control input functions (*5)
Control output functions (*5)
Standard serial output functions (*5)
BCD output functions (*5)
RS-422/485, RS-232C functions (*5)
Setpoint input functions (*5)
Analog 4-20 mA output functions (*5)
Reserved internally*1: "Double Word" word order is low word first (L/H).
*2, *4: For the detailed description, refer to the next page.
*3: This function is available for the software version 1.08 or later*5: Refer to "21. FUNCTION LIST".

AD-4401A

Page 60

*2: Status display bit address
Data address

Item

400009.15-07

Reserved internally

400009.06

Near-zero(Check weighing)

400009.05

Small flow

(Normal / Loss-in-weight)

Lo-Lo(Check weighing)

400009.04

Medium flow

(Normal / Loss-in-weight)

Lo(Check weighing)

400009.03

Large flow / Full (Normal / Loss-in-weight)

Go(Check weighing)

400009.02

Overweight(Normal / Loss-in-weight)

Hi(Check weighing)

400009.01

Underweight(Normal / Loss-in-weight)

Hi-Hi(Check weighing)

400009.00

Near-zero(Normal / Loss-in-weight)

400010.15-07

Reserved internally

400010.06

ZERO

400010.05

STABLE (MD: Motion detection)

400010.04

GROSS

400010.03

NET

400010.02

HOLD

400010.01

Function □ (FncF-05)

400010.00

ALARM*3: During an internal write cycle / Write result0:

Write success1:

Write failure

2-8:Calibration error (C Err)

15:

During an internal write cycle

Refer to "6.2. Calibration Using Calibration Weights".

Page 61

AD-4401A

15. Option-04 RS-232C
15.1. Pin Assignment

14

25

1

13

The applicable connector is a D-sub 25-pin male connector. The locking screw is M2.6.
The connector is not provided and must be prepared by the user.
Pin No.

Description

1

FG

2

RXD

3

TXD

4

CTS

5

RTS

6

DTR

7

GND

8

DCD

9 to 19

NC

20

DSR

21 to 25

NC

AD-4401A

Page 6215.2. Connection Diagram
Connection to a PC serial port is as follows.
AD 4401A

8 DCD

1 DCD

3 TXD

2 RXD

2 RXD

3 TXD

20 DSR

4 DTR

7 GND

5 GND

6 DTR

6 DSR

4 CTS

7 RTS

5 RTS

8 CTS

22 DI

9 RI

PC

15.3. Communication Specifications
Signal Level

RS-232 compliant

Baud rate (rS F-03)

600, 1200, 2400, 4800, 9600, 19200, 38400, 115200 bps

Character bit length (rS F-05)

7, 8 bits

Parity (rS F-04)

None, Odd, Even

Start bit length

1 bit

Stop bit length (rS F-06)

1, 2 bits

Code

ASCII

Terminator (rS F-07)

CR LF, CR

15.4. Output Data, Communication Type
Refer to “14. OPTION-03 RS-422/485” for output data and communication type.

Page 63

AD-4401A

16. Option-07 Analog 4-20mA Output
16.1. Terminal Assignment

Terminal No.

SymbolDescription

8

A+

Analog current output +9A-Analog current output -

10

SHLD

Frame ground

When the optional analog 4-20mA output is not installed, the pins No.8 and No.9 are vacant.
Check the 07 column of the option list on the side of the indicator casing.

16.2. Connection Diagram

ShieldExternal load resistanceAnalog current +Analog current -Applicable solderless terminal: R1.25-3
Applicable wire size:

0.3 to 0.75 mm2. Use a 2-wire shielded twisted pair cable.

External load resistance:

0 to 600 Ω

AD-4401A

Page 6416.3. Output Specifications
Analog current output

4 to 20mA DC
External load resistance: 0 to 600 Ω

Maximum resolution

1/4000Accuracy±0.1%FS

Temperature coefficient
Conversion rate

Offset drift: ±3.2µA/°C
Gain drift: ±0.02%/°C
10 ms

16.4. Output Functions
Select an output weight value (An F-01) from the following:.
1: Displayed weight value (default)
2: Gross value
3: Net value●Output adjustment
Output characteristic is represented by the straight line obtained by connecting between the weight value at
4 mA output (An F-02) and the weight value at 20mA output (An F-03).

Output current

20mA

4mA
Weight value
0

3000

Page 65

AD-4401A

17. Option-23 Modbus-TCP

Modbus-TCP is available for the software version 1.11 or later.

17.1. Pin Assignment

The applicable connector is an RJ45.
The connector is not provided and must be prepared by the user.
Note on the appearance change
Due to some discontinued main components for the AD-4401A-23, the appearance is changed as shown
below. After this change, the connectors cannot be inserted or disconnected with the terminal block coverattached. The function is same as that of the existing ones.
Before changed

After changed

The latch is on the upper side.

The latch is on the lower side.

Pin No.

Description (Fixed to MDI)

1

Send data +2

Send data -3

Receive data +

4

NC

5

NC

6

Receive data -

7

NC

8

NC

17.2. Communication Specifications
Ethernet standard

10Base-T/100Base-TX (Auto-negotiation)

ProtocolModbus-TCP (Port 502, Unit ID 255）

AD-4401A

Page 66

17.3. IP Address, Subnet mask, Default gateway
Consult with the network administrator for the IP address, subnet mask, and default gateway setting.
EthF

Item
IP address

XXX.

Setting Value
XXX.

XXX.

Default

XXX
0.0.0.0

01

to

02

192.168.0.2

255.255.255.255

0304
Subnet mask

255.

255.

XXX.

0
Available only to05

255.255.0.0

06

or

07

255.255.255.0

255.255.255.0

08
Default

XXX.

XXX.

XXX.

XXX

gateway

0.0.0.0

09

to

10

0.0.0.0

255.255.255.255

1112

Refer to "14.10. Modbus-RTU When Communication Type (rS F-02) is 9"
for "Function code and maximum quantity" and "Data address".

Page 67

AD-4401A

18. Setpoint Setting

Set setpoint values for batch weighing and check weighing.
Select a setpoint setting method (SP F-01) from the following.
0: Key switches, RS-232C or RS-422/485 (Setpoint input not used) (default)
1: 5-digit input from external devices
2: 16-digit input from external devices
Refer to “14. OPTION-03 RS-422/485” for the setting procedure of the RS-232C or RS-422/485.
Refer to “11. SETPOINT INPUT” for the setting procedure using 5-digit or 16-digit input from external
devices.

18.1. Setting Using Key Switches
Operation
Normal mode
SETPOINT key

Goes to the item selection mode.

Item selection
ENTER key

Selects the blinking item in the lower status display and goes to the inputting
mode of the item.

TARE key

Shifts the blinking item in the lower status display to the right.

ZERO key

Shifts the blinking item in the lower status display to the left.

ON/OFF key

Returns to the normal mode.

Setpoint input
ENTER key

Saves the setpoint and returns to the item selection mode.

TARE key

Shifts the blinking digit to the right.

ZERO key

Shifts the blinking digit to the left.

NET/GROSS key

Increases the blinking digit by one.

Function key

Decreases the blinking digit by one.

ON/OFF key

Cancels the setpoint and returns to the item selection mode.

AD-4401A

Page 68

Normal mode

Select an item

Save

CancelInput a setting value

Page 69

AD-4401A

18.2. Setpoint Values List
Setpoints available for setting depend on the calibration function weighing mode (CALF-14).
When the minimum division (CALF-03) is 10 d or more, the setpoint will be ten times the setting value.
Weighing mode: Normal batching / Simple comparison normal batching
Status display

Item

Setting value

Blinking FINAL

Final weight

Blinking F.FALL

Free fall

Blinking PRELIM

Preliminary-999999 to 9999999

Blinking OP.PLM

Optional preliminary

0: Not used

Blinking OVER

Overweight

Blinking UNDER

Underweight

Blinking Z.BAND

Near-zero-999999 to 9999999-999999 to 9999999

Weighing mode: Loss-in-weight batching / Simple comparison loss-in-weight batching
Attach the accessory status label on the lower status display.
Status display

Item

Setting value

Blinking FINAL

Final weight

Blinking F.FALL

Free fall

Blinking PRELIM

Preliminary-999999 to 9999999

Blinking FULL

Full

0: Not used

Blinking OVER

Overweight

Blinking UNDER

Underweight

Blinking Z.BAND

Near-zero-999999 to 9999999-999999 to 9999999

Weighing mode: Check weighing 1/2/3/4
Attach the accessory status label on the lower status display.
Status display

Item

Blinking Z.BAND

Near-zero

Blinking Lo-Lo

Lo-Lo

Blinking Lo

Lo

Blinking Go

Go

Blinking Hi

Hi

Blinking Hi-Hi

Hi-Hi

AD-4401A

Setting value-999999 to 9999999

Page 70

19. Operation Checking

Operations are checked in the checking mode.

Select an operation to be checked and press the ENTER key.

Select an operation to be checked

Key switches

Control input/output

Software version

Standard serial output

Load cell input

BCD output

Analog 4-20 mA output

RS-422 / 485, RS-232C

Setpoint input

To each checking mode

Page 71

AD-4401A

19.1. Checking Key Switches
When a key switch is pressed, “0” in the corresponding position turns to “1”.

19.2. Checking Control Input/Output
When an input terminal is ON, “0” in the corresponding position turns to “1”.
When the NET/GROSS key or Function key is pressed, the corresponding pin No. of the control output B1 to
B6 turns ON.

A6 A5 A4 A3 A2 A1

B1 to B6

19.3. Checking Standard Serial Output
When the ENTER key is pressed, “123” is sent. The communication specifications comply with the standard
serial output specifications.

AD-4401A

Page 72

19.4. Checking BCD Output
When the hold input turns ON, “0” turns to “1” and the output of the displayed pin No. turns ON.
Press the NET/GROSS key or Function key to switch pin Nos.

Hold input

Pin No.

19.5. Checking RS-422/485, RS-232C
When the ENTER key is pressed, “123” is sent. When “123” is received, “PASS” is displayed.
The communication specifications comply with the RS-422/485, RS-232C specifications.

19.6. Checking Setpoint Input
The output terminal in the sub-display turns ON and the read value is displayed.

Output terminal

Read value

Page 73

AD-4401A

19.7. Checking Analog 4-20 mA Output
The current value (mA) in the sub-display is output.
Press the NET/GROSS key or Function key to increase or decrease the current value.

2 mA Output

20 mA Output

19.8. Checking Load Cell Input
The load cell signal voltage (mV/V) is displayed in the sub-display.

19.9. Checking Software Version
The AD-4401A software version is displayed in the sub-display.

AD-4401A

Page 74

19.10. Checking the Load Cell Connection with a Digital Multimeter
The load cell connection can be checked easily using a digital multimeter.

Measurement point

Item to be measured

1

4

EXC+

EXC-

5

6

SIG+

SIG-

1

2

EXC+

SEN+

4

3

EXC-

SEN-

6

4

Load

SIG-

EXC-

voltage

Judging

Load cell excitation voltage

Normally 9 to 10 V.

Load cell output voltage

Normally 0 to 30 mV.

EXC+ voltage drop by loadcell cable

The value may exceed 2 V when a long cable is used.
For the 4-wire connection, it is 0 V.

EXC- voltage drop by loadcell cable
cell

Normally 0.2 V or less.

Normally 0.2 V or less.
The value may exceed 2 V when a long cable is used.
For the 4-wire connection, it is 0 V.

middlepoint

Normally 4.5 to 5 V, half of the load cell excitation
voltage.

Page 75

AD-4401A

19.11. Check List
If the AD-4401A operates improperly, contact your local A&D dealer.
Use the chart below to write necessary items before contacting your dealer.
Checking item

ExampleWeighed product

Plastic pellet, livestock feed

Capacity of the weighing instrument

20.00 kg

Minimum division of the weighing instrument

0.01 kg

Initial load on the weighing instrument

30 kg

Load cell connection method

6-wire4-wire・

Length of the extension load cell cable

6-wirem

Cross section of the load cell cable

Approx. 100 m

mm2

0.5 mm2

Number of load cells connected

3 units

Summing box

Used

・

Not used

Used

Load cell model number and manufacturer

LC4221-K050 A&D

Load cell rated capacity

50.99 kg

Load cell rated output

mV/V

2.0394 mV/V

Load cell input resistance

Ω

400 Ω

Load cell output resistance

Ω

350 Ω

Load cell output at initial load *1
Load cell output at capacity or any load. *1

mV/V

Approx. 0.4 mV/V

At

At 20.00 kg
mV/V

Control I/O

Connected to

Setpoint input

Connected toStandard serial output

Connected to

OP-01 BCD output

Connected to

OP-03 RS-422/485

Connected to

OP-04 RS-232C

Connected to

OP-07 Analog 4-20mA output

Connected toApprox. 0.8 mV/V
Feed valve, lamp

PLC (Mitsubishi)*1 Refer to"19.8. Checking Load Cell Input".
Digital multimeter measurement value
Measurement points

Measurement value

1 EXC+

4 EXC-

V

5 SIG+

6 SIG-

mV

1 EXC+

2 SEN+

V

4 EXC-

3 SEN-

V

6 SIG-

4 EXC-

V

AD-4401A

Page 7620. Initialization
20.1. Parameter Initialization
While holding the SETPOINT key, turn the AD-4401

Power ON

ON.
With the display shown to the left, press the ENTER
key.

With the display shown to the left, hold the ENTER
key for three seconds or more to initialize theparameters below.
Zero setting value, tare value, status in the main
display, normal mode/OFF mode status, total weight,
number of accumulations, setpoint values, normal/loss-in-weight batching status20.2. General Function Initialization
Power ON

While holding the SETPOINT key, turn the AD-4401
ON.
With the display shown to the left, press the
NET/GROSS key.

With the display shown to the left, press the ENTER
key.

With the display shown to the left, hold the ENTER
key for three seconds or more to initialize theparameters described in 19.1. and general functions.

Page 77

AD-4401A

20.3. All Data Initialization
Press the CAL key in the normal mode.

When “CAL" is displayed, press the ENTER key.

When “CAL Set” is displayed, press the Function key.

When “initAll” is displayed, press the ENTER key.

With the display shown to the left, hold the ENTER
key for three seconds or more to initialize theparameters described in 19.1., general functions andcalibration functions

AD-4401A

Page 7821. Function List
21.1. Calibration Function Setting
Set the calibration functions in the calibration function mode.
Press the CAL key in the normal mode.

When “CAL" is displayed, press the ENTER key.

When “CAL SEt” is displayed, press the NET/GROSS
key.

When “CAL Fnc” is displayed, the indicator hasentered the calibration function mode.
Press the ENTER key to go to the item selection
mode.

Page 79

AD-4401A

Operation in the calibration function mode:
Item selection
ENTER key

Selects the displayed item and goes to the inputting mode of the item.

TARE key

Shifts the blinking item to the right.

ZERO key

Shifts the blinking item to the left.

NET/GROSS key

Increases the blinking digit by one.

Function key

Decreases the blinking digit by one.

ON/OFF key

Returns to the “Cal Set” display.

Setting value input
ENTER key

Saves the setting value and returns to the item selection mode.

TARE key

Shifts the blinking digit to the right.

ZERO key

Shifts the blinking digit to the left.

NET/GROSS key

Increases the blinking digit by one.

Function key

Decreases the blinking digit by one.

ON/OFF key

Cancels the setting value and returns to the item selection mode.

Select an item

Save
Input a setting value

AD-4401A

Page 80

Cancel21.2. General Function Setting
Set the general functions in the general function mode.
Select a function to be set and press the ENTER key to go to the item selection mode.

Select a function to be set

Basic function

Reserved internally

Weighing sequence

Modbus TCP

Control input

Analog 4-20 mA output

Control output

Setpoint

Standard serial output

RS-422 / 485, RS-232C

BCD output

To the item selection mode
Page 81

AD-4401A

Operation:
Item selection
ENTER key

Selects the displayed item and goes to the inputting mode of the item.

TARE key

Shifts the blinking item to the right.

ZERO key

Shifts the blinking item to the left.

NET/GROSS key

Increases the blinking digit by one.

Function key

Decreases the blinking digit by one.

ON/OFF key

Returns to the general function mode.

Setting value input
ENTER key

Saves the setting value and returns to the item selection mode.

TARE key

Shifts the blinking digit to the right.

ZERO key

Shifts the blinking digit to the left.

NET/GROSS key

Increases the blinking digit by one.

Function key

Decreases the blinking digit by one.

ON/OFF key

Cancels the setting value and returns the item selection mode.

Select an item

Save
Input a setting value

AD-4401A

Page 82

Cancel21.3. Calibration Functions
CALF

ModbusItem

01

400101400102Unit

02400103400104

Decimal point position

03
04
05
06

07

08
09
10
11

4001054001064001074001084001094001104001114001124001134001144001154001164001174001184001194001204001214001221240012340012413400125400126

Setting Value
0: None
1: g
2: kg
3: t
4: lb (For USA only)0:0 (No decimal point)
1:
0.0
2:
0.00
3: 0.000
4: 0.0000

Default2(4)0Minimum division

1, 2, 5, 10, 20, 50 d

Maximum capacity

0 to 999999

20000

Zero setting range

0 to 100%2

Zero tracking time

Zero tracking width

Stability detection time
Stability detection width
Tare and zero setting at
unstable weight
Tare at negative gross valueStandard serial output, when theweight value is overloaded or
unstable.
BCD, RS-422/485, RS-232C
output, when the weight value isoverloaded or unstable.

14400127400128Weighing mode

15

400129400130

Load cell signal voltage at zero
calibration

0.0: Not used
0.1 to 5.0 s
0: Not used
1: 0.5 d2: 1.0 d
3: 1.5 d
4: 2.0 d
5: 2.5 d
6: 3.0 d
7:3.5 d8:4.0 d9:4.5 d0.0: Not used
0.1 to 5.0 s
0: Not used
1 to 9 d
0: Disable
1: Enable
0: Disable
1: Enable

1

0.0

0

1.0
2
1
1

0: Disable
1: Enable

1

0: Disable
1: Enable

1

1: Simple comparison normal
batching
2: Simple comparison loss-inweight batching
3: Normal batching
4: Loss-in-weight batching
5: Check weighing 1
6: Check weighing 2
7: Check weighing 3
8: Check weighing 430.000000 to 2.000000

Page 83

Usersetting

0.000000

AD-4401ACALF

Modbus164001314001321718
1940013340013440013540013640013740013820

400139400140214001414001422240014340014423400145400146

Item(Load cell signal voltage at spancalibration−CALF-15)
×CALF-17/Calibration weightvalue at span calibration
Maximum capacity at spancalibration
Symbol used for header 2 ofstandard serial output
Symbol used for header 2 of
RS-232C or RS-422/485
Automatic zero setting upon
power-on. Zero setting range is±10% of the maximum capacity.
Zero clear
Zero calibration, Spancalibration and Calibration
function setting via Modbus(*)
Calibration weights at spancalibration via Modbus.(*)

Setting Value

Default

0.000000 to 3.200000

2.000000

0 to 999999

20000

1: GS/NT/TR
2: G/N/T
1: GS/NT/TR
2: G/N/T

1

0: Disable
1: Enable

0

0: Disable
1: Enable

1

0: Disable
1: Enable

1

0 to 999999

20000* Available for the software version 1.03 or later

AD-4401A

1

Page 84

User
setting

21.4. Basic Functions
FncF

Modbus

Item

Setting Value

00000000: All keys unlock
10000000: CAL key lock
01000000: SETPOINT key lock
00100000: ZERO key lockKey lock in the normal
00010000: TARE key lockmode (excluding
00001000: NET/GROSS key lockcombination keys)
00000100: Function key lock
00000010: ENTER key lock
00000001: ON/OFF key lock
0: None1: Manual print
2: Hold
3: Weighing start
4: Emergency stop
5: Zero clear
6: Tare clear
7: Total clear
8: kg/lb unit selection (For USA only)
9: Weighing restart
Function of Function key
10: Discharge start
11: Forced weighing end
12: Forced discharge end
13: Error clear
14: Manual correction flow
15: Normal/Loss-in-weight batching
selection
16: Accumulation
17: Undoing accumulation

01

4003014003020240030340030403400305400306

Display update rate

04

400307400308Function of sub-display

05

400309400310Condition to turn the
FUNCTION status ON

1: 20 times/s
2: 10 times/s
3: 5 times/s
0: None
1: Gross value
2: Net value
3: Tare value
4: Final weight
5: Total weight
6: Number of accumulations
7: Weighing sequence error
0: None1: During discharge
2: When zero tracking is enabled
3: In weighing sequence
4: Normal batching (/loss-in-weightbatching)

Page 85

Default

User
setting

0000
0000

0

1

0

0

AD-4401A

FncF

ModbusItem
101 digit:
Pre-digital filter cutoff
frequency
100 digit:
Post-digital filter cutoff
frequency

06400311400312Pre-digital filter andpost-digital filter areconnected in series.

HPDF cutoff frequency

07

08
09

10

400313400314400315400316400317400318400319400320AD-4401A

Sampling frequency
divider ratio(Disabled when FncF-06
is 101 to 109)

Hold function
Comparison at holdCondition to turn the
ALARM status ON

Setting Value
0:
1:
2:
3:
4:
5:
6:
7:
8:
9:

None
11.0 Hz
8.0 Hz5.6 Hz4.0 Hz2.8 Hz2.0 Hz1.4 Hz1.0 Hz0.7 Hz101: 11.0 Hz (HPDF)
102: 8.0 Hz (HPDF)
103: 5.6 Hz (HPDF)
104: 4.0 Hz (HPDF)
105: 2.8 Hz (HPDF)
106: 2.0 Hz (HPDF)
107: 1.4 Hz (HPDF)
108: 1.0 Hz (HPDF)
109: 0.7 Hz (HPDF)
1: (FncF-06)/1
2: (FncF-06)/2
3: (FncF-06)/3
4: (FncF-06)/4
5: (FncF-06)/5
6: (FncF-06)/6
7: (FncF-06)/7
8: (FncF-06)/8
9: (FncF-06)/9
10:((FncF-06)/10
1: Normal hold
2: Peak hold
0: Disable
1: Enable
00000000: None
00000001: Overload
00000010: Total weight / number ofaccumulations overflow
00000100: Zero setting error
00001000: Tare error
00010000: Weighing sequence error

Page 86

Default

48

1

1
0

0000
0111

User
setting

21.5. Weighing Sequence Functions
Sq F

ModbusItem

01

400401
400402Comparison target

02400403400404

Automatic accumulation
condition

03

400405400406

Automatic free fallcorrection

04

40040740040805

40040940041006

40041140041207400413400414

Automatic free fallcorrection range
Minimum small flow time
for the automatic free
fall correction
OK / Over / Under
output timing
Wait for the weight value
to be stable before thejudgment
Maximum number ofcorrection flow
Weighing start input
delay time
Large flow comparison
disable time
Medium flow
comparison disable time
Small flow comparison
disable time

08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

400415400416400417400418400419400420400421400422400423400424400425400426400427400428400429400430400431400432400433400434400435400436400437400438400439400440400441400442400443400444400445400446400447400448

Setting Value
1: Internal value
2: Displayed weight value
0: Disable
1: OK only
2: Regardless of the judgment result
0: Disable
1: Moving average of last four weighings
2: Fuzzy

Default
10
00 to 9999999

00.0 to 30.0 s

3.0

1: Always
2: In synchronization with weighing end

2

0: Disable
1: Enable

1

0: Disable correction flow
1 to 300

00.0 to 30.0 s

0.0

0.0 to 30.0 s

0.0

0.0 to 30.0 s

0.0

0.0 to 30.0 s

0.0Judging delay time

0.1 to 30.0 s

0.1

Weighing end output
time

0.0: Until the next weighing start
0.1 to 30.0 s
0: None1: 1 to 86400 s

Flow timeout time
Correction flow ON time
Correction flow OFF
time
Discharge start input
delay time
Discharge end delaytime
Discharge timeout time
Add the final weight tothe near-zero setpoint
value
Add the final weight tothe full setpoint value

User
setting0.0
00.01 to 3.00 s

0.10

0.1 to 30.0 s

0.1

0.0 to 30.0 s

0.0

0.1 to 30.0 s

0.1

0: None1: 1 to 86400 s

0

0: Disable
1: Enable

0

0: Disable
1: Enable

0

1: Positive logic
2: Negative logic

1

Reserved internallySimple comparison
large/medium/small flow
output logic

Page 87

AD-4401ASq F

Modbus

Item

Setting Value

25400449400450Normal /loss-in-weightbatching selection by
the control input orfunction key

0: Disable
1: Enable

026400451400452Comparison target for
the near-zero value

1: Gross value
2: |Gross value|
3: Net value
4: |Net value|127400453400454

1: Gross value
2: Net value

228400455400456

0: Disable
1: Enable

0AD-4401A

Comparison target
excluding the near-zeroand full values
Automatic tare atweighing start

Page 88

Default

User
setting

21.6. Control Input Functions
in F
01
02
03
04
05
06

Modbus

Item

Setting value

Control input function

0: None
1: Zero setting
2: Tare3: Weighing start
4: ON = Emergency stop
/ OFF = Release
5: Discharge start
6: ON=Disable / OFF=Enable key
lock (FncF-01)
7: Manual free fall correction
8: ON=Disable / OFF=Enable reading
the setpoint input.
9: Tare clear
10: Accumulation
11: Undoing accumulation
12: Total clear
13: ON=Hold / OFF=Release
14: Print
15: Zero clear
16: Gross value display
17: Net value display
18: ON=Display gross value
OFF=Display net value
19: Weighing restart
20: Pause
21: Forced weighing end
22: Forced discharge end
23: Error clear
24: ON=Select loss-in-weight batching
OFF=Select normal batching
25: Manual correction flow
(One-shot small flow)
26: ON=Checking weighing start
OFF=Checking weighing stop

400501400502400503400504400505400506400507400508400509400510400511400512

Page 89

Default

User
setting

1
2
3
4
5
6

AD-4401A

21.7. Control Output Functions
out F
01
02
03
04
05
06
07
08

Modbus

Item

Setting value

400601400602400603400604400605400606400607400608400609400610400611400612400613400614400615400616

Condition to turn eachcontrol output ON

0: None1: Near-zero
2: Underweight, Hi-Hi
3: Overweight, Hi
4: Large flow, Full, Go
5: Medium flow, Lo
6: Small flow, Lo-Lo
7: Discharge
8: Weighing end
9: Stable
10: In the normal mode
11: In weighing sequence
12: Weighing sequence error
13: 0.5 s after detecting a rise edge ofthe control input
14: When zero setting fails
15: Overload
16: Reserved internally
17: When tare fails
18: When zero setting or tare fails
19: Total weight / number ofaccumulations overflow
20: When the judgment result is OK
21: Hold
22: ON = loss-in-weight batching/ Off = Normal batching

AD-4401A

Page 90

Default
1
2
3
4
5
6
7
8

User
setting

21.8. Standard Serial Output Functions
Si

F

ModbusItem

01

400701400702

Output weight value

02

400703400704

Data output timing

03
04

400705400706400707400708

Baud rate
Standard serial output
slave address

Setting Value
1: Displayed weight value
2: Gross value
3: Net value
4: Tare value
5: Gross value + Net value + Tare value
6: Total weight
7: Number of accumulations
8: Total weight and number ofaccumulations
1: Interval output at the display update
rate (FncF-03)
2: In synchronization with automatic print
3: In synchronization with manual print
4: In synchronization with automatic /manual accumulation
1: 600 bps
2: 2400 bps
0: None1 to 99

Default

User
setting

1

1

2
021.9. BCD Output Functions
bCdF

Modbus01

400801400802

Output weight value02400803400804

Data output timing

0304400805400806400807400808Item

Data output logic
Strobe output logic

Setting Value
1: Displayed weight value
2: Gross value
3: Net value
4: Tare value
1: Interval output at the display update
rate (FncF-03)
2: In synchronization with automatic print
3: In synchronization with manual print
1: Positive logic
2: Negative logic
1: Positive logic
2: Negative logic

Page 91

Default

User
setting1

1

2
2

AD-4401A

21.10. RS-422/485, RS-232C FunctionsrS

F

ModbusItem

01

400901400902

Output weight value

02400903400904

Communication type03

400905400906

Baud rate

04

400907400908

Parity

05
06
07
08
09
10

400909400910400911400912400913400914Character bit length
Stop bit length
Terminator

400915400916

RS-422/485
electrical specifications

400917400918400919400920RS-422/485
slave address
Command Responsedelay time

AD-4401A

Setting Value
1: Displayed weight value
2: Gross value
3: Net value
4: Tare value
5: Gross value + Net value + Tare value
6: Total weight
7: Number of accumulations
8: Total weight and number ofaccumulations
1: Interval output at the display update
rate (FncF-03)
2: In synchronization with automatic print
3: In synchronization with manual print
4: Response to command
5: Interval output of comparison resultand gross value at 100 times/s
6: Interval output of comparison resultand net value at 100 times/s.
7: In synchronization with
automatic/manual accumulation
8: Interval output at 100 times/s
9: Modbus-RTU
1: 600 bps
2: 1200 bps
3: 2400 bps
4: 4800 bps
5: 9600 bps
6: 19200 bps
7: 38400 bps
8: 115200 bps
0: None1: Odd2: Even
7: 7 bits
8: 8 bits
1: 1 bit
2: 2 bits
1:CR
2:CR LF
1: RS-422 (rS F-09=0)
1: 4-wire RS-485 (rS F-09 ≠ 0)
2: 2-wire RS-485
0: None1 to 99
0.00 to 3.00 s

Page 92

Default

1

1

5

2
7
1
2
1
0
0.06

User
setting

21.11. Setpoint Input Functions
SP F

Modbus

Item

Setting Value

Default

01

401001401002

Setpoint setting method

0: Setpoint input not used
1: 5-digit input from external devices
2: 16-digit input from external devices

Usersetting

021.12. Analog 4-20 mA Output Functions
An F

Modbus

Item

Setting Value01

401101401102

Output weight value1401103401104401105401106Weight value at 4 mA
outputWeight value at 20 mA
output1: Displayed weight value
2: Gross value
3: Net value-999999 to 9999999

0-999999 to 9999999

20000

02
03

Default

User
setting

21.13. Modbus TCP Functions
EthF

Modbus

Item

Setting Value

Default

User setting

IP address XXX. XXX. XXX. XXX
01

-

02

-

03

-

04

-

0.0.0.0
to255.255.255.255

Subnet255. 255. XXX.

0

mask

Available only to05-

255.255.0.0

06

-

or

07

-

255.255.255.0

08

Default
-

10

-

11

-

12

-

255.255.255.0

XXX. XXX. XXX. XXX

gateway09

192.168.0.2

0.0.0.0
to0.0.0.0

255.255.255.255

Page 93

AD-4401A

22. Specifications
Dimensions
Operating temperature andhumidity range
IP ratingPower supply
Power supply voltage
Maximum apparent power
Rush current
Fuse
Load cell input
Excitation voltage
Signal input range
Minimum input sensitivity
Zero calibration range
Nonlinearity
Temperature coefficient
Sampling rate
Display
Main display
Sub-display
Unit
Status display
Key switches
Key switch
Key switch with sealing cover
External Input / output
Control I/O
Setpoint inputStandard serial output
Option boards
BCD output
RS-422/485
RS-232C
Modbus TCP

144 (W) x 72 (H) x 197 (D) mm-10 °C to 40 °C
Less than 85%RH, non-condensing
When the indicator is secured to the control panel:
Outside of the control panel: IP65
Inside of the control panel: IP2X
100 VAC to 240 VAC +10% -15%, 50/60 Hz ±5%
30 VA
100 VAC: 15 A or less, 200 VAC: 30 A or lessInternal (Not user replaceable)
10 VDC±5% 230 mA
Up to eight 350 Ω load cells can be connected in parallel.
6-wire type with remote sensing
0.0 to 3.2 mV/V
0.3 µV0.0 to 2.0 mV/V
±0.01%
Zero drift: ±0.2 µV/°C RTI Typ., Span drift: ±8ppm/°C Typ.
100 times/s
7-digit VFD with character height of 13 mm
8-digit VFD with character height of 7 mm
g, kg, t, lb (For USA only) or none (selectable)
1471
Non-voltage contact input: 6 points
NPN open collector: 8 points
Key matrix input
Current loop output

A slot is available only for analog 4-20 mA output.
Among other option boards, only one can be installed.

Analog 4-20 mA output

AD-4401A

Page 94External dimensions

パネルカット寸法
Panelcutout dimensions
dimensions
Panelcutout板厚 thickness:
1.6～3.2
Panelthickness:1.6
1.6to
to3.2
3.2
Panel

Unit: mm

Page 95

AD-4401A

MEMO

AD-4401A

Page 96

MEMO

Page 97

AD-4401A

MEMO

AD-4401A

Page 98

THIS PAGE INTENTIONALLY LEFT BLANKBack cover: A&D Global

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