A&D AD-8923-BCD User manual

1WMPD4002137C

© 2013 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.

3
CONTENTS
1. INTRODUCTION......................................................................................................................4
1.1. Features ............................................................................................................................................... 4
2. DESCRIPTION OF EACH PART .............................................................................................5
2.1. Display .................................................................................................................................................. 6
2.2. Keys...................................................................................................................................................... 6
2.3. Connectors ........................................................................................................................................... 6
3. CONNECTION.........................................................................................................................7
3.1. Setting the weighing instrument and the AD-8923-BCD.................................................................. 7
3.2. Connecting the cables ......................................................................................................................... 7
3.3. Turning the power on ........................................................................................................................... 8
3.4. Operation............................................................................................................................................ 10
3.5. Performing Sensitivity Adjustment with the AD-4212C/F................................................................ 10
4. FUNCTION SETTING ............................................................................................................12
4.1. Display and keys ................................................................................................................................ 13
4.2. Function table..................................................................................................................................... 13
4.3. Initializing the AD-8923-BCD............................................................................................................. 14
5. RS-232C CONNECTOR ........................................................................................................ 15
5.1. RS-232C serial interface specifications ............................................................................................ 15
6. BCD OUTPUT CONNECTOR................................................................................................16
6.1. Connector Pin No and Specifications ............................................................................................... 16
6.2. Fixing of the Decimal Point Position.................................................................................................. 19
7. TROUBLESHOOTING...........................................................................................................20
8. SPECIFICATIONS ................................................................................................................. 21
8.1. Applicable Instruments ...................................................................................................................... 22
9. EXTERNAL DIMENSIONS ....................................................................................................24

4
1. INTRODUCTION
This manual describes how the AD-8923-BCD remote controller works and how to get the most out of it
in terms of performance.
Read this manual thoroughly before using the AD-8923-BCD and keep it at hand for future reference.
1.1. Features
Connecting the AD-8923-BCD remote controller to a weighing instrument will enable transmission of RS-
232C weight data from the weighing instrument to a PLC using BCD output.
Displays the weight data transmitted from the weighing instrument.
Can change the weighing speed of the AD-4212C/D/F, perform sensitivity adjustment with the AD-
4212C/D/F using an external weight and share the power supply with the AD-4212C/D/F.
Note
When connected to the following instruments, power can be supplied to both instruments
by plugging the AC adapter into either the weighing instrument or the AD-8923-BCD.
(Both instruments can have their AC adapter connected at the same time.)
Compatible models: AD-4212C/D/F, FZ, FX, GX-A, GF-A, GX-M, GF-M, GX-L, GF-L, HR-AZ,
HR-A (Refer to “3.3. Turning the power on”)

5
2. DESCRIPTION OF EACH PART
Note
When the AD-8923-BCD is to be built into a
weighing system, be sure to ground the FG
terminal.
Please confirm that the AC adapter type is
correct for your local voltage and receptacle
type.
See the note below.
Display
Keys
Rear View
AC adapter
input jack
DC input terminal
BCD connector
FG terminal
RS-232C connector
(D-Sub 9-pin)
AD8923
AD8923 AD8923
AD8923
Accessories
BCD plug 1 pc.
AC adapter 1 pc.
AD adapter
ID label
Attach the identification sticker for your
model to the AC adapter as shown.

6
2.1. Display
Displays the weight data received. When the unit is “g” (gram), the unit indicator turns on. If the balance
outputs RS-232C weighing data that exceeds six digits, the AD-8923-BCD does not display the high-
end digits (2 highest digits for an 8 digit display). The BCD data is output.
When the weight value is stable (the header of the weight data received is “ST”), the STABLE indicator
turns on.
If the AD-8923-BCD does not receive the weight data for two seconds or more,
is displayed (Bar display).
Displays the AD-4212C/D/F weighing speed that is currently set, by turning on the weighing speed
indicator.
When connected to other instruments, the AD-8923-BCD weighing speed indicators have no function.
2.2. Keys
Operates the weighing instrument. For details, refer to “3.4. Operation”.
To enter the function setting of the AD-8923-BCD, press the CAL key while holding down
the ON:OFF key. For details, refer to “4. FUNCTION SETTING”.)
2.3. Connectors
RS-232C connector.......D-Sub 9-pin (male)
Used for connection to the weighing unit. For the proper cable, refer to the instruction manual for the
weighing instrument used.
BCD connector ..............Half pitch 50-pin (female)
Used for connecting the AD-8923-BCD to another instrument. For details, refer to “6. BCD OUTPUT
CONNECTOR”.
DC input terminal (24 DCV) / AC adapter input jack
Either power supply can be used. For details, refer to “3.3. Turning the power on”.
Weighing
speed
indicators
Turns on while the weighing
instrument is in the standby mode.
STABLE indicator
Unit indicator
AD-8923
REMOTE CONTROLLER
ON:OFF
CAL
SAMPLE PRINT
MODE
RE-ZERO
STABLE FAST MID.
RESPONSE
SLOW

7
3. CONNECTION
3.1. Setting the weighing instrument and the AD-8923-BCD
Set the following items so that the weighing instrument and the AD-8923-BCD have the same value for
each item.
Item
Weighing instrument
AD-8923-BCD
Baud rate
600, 1200, 2400*, 4800, 9600, 19200 bps
Data bits, parity
7 bits EVEN*
Stop bit
1 bit*
Terminator
<CR><LF>*
Data format
A&D standard format
−
Communication control
No RTS/CTS control
−
Data output mode
Stream mode
−
* Factory setting for the AD-8923-BCD. The factory setting for the weighing instrument is the same
unless otherwise specified.
3.2. Connecting the cables
Connect the cables using the connectors located on the rear of the AD-8923-BCD.
Connection example to the AD-4212C and a PLC
Note
Be sure to ground the AD-4212C and the AD-8923-BCD.
PLC
AD-8923-BCD
RS-232C connector (D-Sub 9-pin)
AD-4212C
Connect to the power supply
Turning the power on
BCD connector (Half pitch 50-pin)
Ground
BCD signals

8
3.3. Turning the power on
As a power supply, an external 24-VDC power supply (24 VDC±10% / 700mA) or a 12-VDC AC adapter
can be used.
When connected to the following instruments, power can be supplied to both instruments by plugging the
AC adapter into either the weighing instrument or the AD-8923-BCD.
(Both instruments can have their AC adapter connected at the same time.)
Compatible models: AD-4212C/D/F, FZ, FX, GX-A, GF-A, GX-M, GF-M, GX-L, GF-L, HR-AZ, HR-A
When the external 24-VDC power supply is used
Connect an external 24-VDC power supply to the DC input terminal located on the rear of the AD-8923-BCD.
Precautions on using the external power supply
CAUTION
Use a power supply within the rated voltage range (24 VDC±10%).
Never use a power supply with a voltage exceeding the rated range.
It may cause damage or heat buildup.
The AD-8923-BCD may not function properly.
Ground the FG terminal of the switching power supply used.
To avoid electrical shock and increase the system safety.
To increase the resistance against noises.
Do not share the power line with other devices.
Strong noises introduced from other devices may cause damage to the AD-8923-BCD.
Inrush current from other devices may cause the AD-8923-BCD not to start up properly.
Circuit configuration of the AD-8923-BCD may affect other devices to prevent them from
functioning properly.
Select a switching power supply with a capacity of approximately 700mA for each AD-8923-BCD.
Note that the AD-8923-BCD may not start up with a capacity less than 700mA.
If the power supply capacity is not sufficient, the AD-8923-BCD may not function properly.
Be sure to add a noise filter on the front end of the switching power supply and ground the FG terminal.
This will increase the resistance against noises.
Be sure to ground the FG terminal of the AD-8923-BCD and weighing instruments.
This will increase the resistance against noises.

9
Cable connection
CAUTION
Before inserting the power line, make sure that the power to the AD-8923-BCD is turned off.
(1) Inserting the power line
Press down the release button on the DC
input terminal using a screwdriver and
insert the power line.
The recommended stripping length for the
power line is 10 mm.
Applicable wire range
Single wire: φ1.0 mm (AWG 26) to φ1.2 mm (AWG 16)
Twisted wire: 0.3 mm2(AWG 22) to 0.75 mm2(AWG 20)
Individual wire diameter φ0.18 mm or greater
(2) Securing or removing the power line
To secure the power line, return the release button to the initial position using the screwdriver.
The power line will be locked. To remove the power line, press the release button again using
the screwdriver, unlocking the power line.
When the AC adapter is used
Insert the AC adapter plug into the AC adapter
input jack located on the rear of the AD-8923-BCD
and insert the AC adapter into an electrical outlet.
DC input terminal
AD
-8923-BCD rear
Release button
Screwdriver
Power line
AC adapter input jack
DC input terminal
AC adapter plug
AD-8923-BCD rear

10
3.4. Operation
Displays the data transmitted by the weighing instrument connected.
The keys on the AD-8923-BCD can control the weighing instrument. The key operation depends
on the weighing instrument connected. For details, refer to “Table 2” of “8.1. Applicable Instruments”.
3.5. Performing Sensitivity Adjustment with the AD-4212C
/
F
The following is the sensitivity adjustment procedure when the AD-4212C/F is connected.
(An external weight is used.)
Caution
Do not allow vibration, drafts or temperature change to affect the AD-4212C during sensitivity
adjustment.
Caution on using an external weight
The accuracy of the weight can influence the accuracy of weighing.
Select an appropriate weight as listed below.
A weight of 200 g is provided with the AD-4212C as a standard accessory.
Weighing instrument
Usable weight
AD-4212C-300
AD-4212C-301
50g, 100g,
200 g
,
300g
AD-4212C-600
50g, 100g,
200 g
,
300g, 400 g, 500 g, 600 g
AD-4212C-3000
AD-4212C-3100
50g, 100g,
200 g
, 300g, 500 g, 1000 g, 2000g, 3000g
AD-4212C-6000
200 g
, 500 g, 1000 g, 2000g, 3000g, 4000 g, 5000 g, 6000 g
AD-4212F-6203D
50 g, 100g, 200 g, 300 g, 500 g, 1000 g,
2000 g
, 3000 g, 4000 g,5000 g, 6000 g
AD-4212F-10202
500 g, 1000 g, 2000 g, 3000 g, 4000 g,
5000 g
, 6000 g ,7000 g, 8000 g, 9000 g, 10000 g
AD-4212F-22001
1000 g, 2000 g, 5000 g,
10000 g
, 20000 g
The weight in bold type: Factory setting
Display
This indicator means “the AD-4212C is measuring sensitivity adjustment
data”. Do not allow vibration, drafts or other external disturbances to
affect the AD-4212C while this indicator is displayed.

11
Sensitivity adjustment procedure
Performs sensitivity adjustment with the AD-4212C using the external weight.
Operation
1. Warm up the AD-4212C for 30 minutes or more
with nothing on the pan.
2. Press the CAL key. is displayed.
If you want to cancel sensitivity adjustment, press the CAL key.
The display will return to the weighing mode.
If you want to change the weight value, press the SAMPLE key.
Press the RE-ZERO key to select the weight value, and press
the PRINT key to store it. is displayed.
3. Confirm that there is nothing on the pan and press
the PRINT key. The AD-4212C measures the zero point.
Do not allow vibration or drafts to affect the AD-4212C.
The weight value is displayed.
4. Place a weight, of the weight value displayed, on the pan
and press the PRINT key.
The AD-4212C measures the weight.
Do not allow vibration or drafts to affect the AD-4212C.
5. is displayed. Remove the weight from the pan.
6. The display will automatically return to the weighing mode.
7. Place the weight on the pan and confirm that adjustment
was performed correctly. If not, check the ambient conditions
such as drafts or vibration, and repeat steps 2 through 7.
Press
Weight
Press
Press
STABLE FAST MID.
RESPONSE
SLOW
CAL
STABLE FAST MID.
RESPONSE
SLOW
PRINT
STABLE FAST MID.
RESPONSE
SLOW
STABLE FAST MID.
RESPONSE
SLOW
PRINT
STABLE FAST MID.
RESPONSE
SLOW
STABLE FAST MID.
RESPONSE
SLOW
STABLE FAST MID.
RESPONSE
SLOW

12
4. FUNCTION SETTING
Function setting specifies the AD-8923-BCD performance. The parameters are stored in non-volatile
memory, and are maintained even if the power line or AC adapter is removed.
The function setting menu consists of two layers. The first layer is the “Class” and the second layer is the
“Item”. Each item stores a parameter.
Press the SAMPLE key to select an item and press the RE-ZERO key to change the parameter.
Then, press the PRINT key to store the new parameter.
Example
This example sets “Baud rate” to “9600 bps”.
Note
The AD-8923-BCD may not function properly, depending on the settings and operating
environment. Check the settings and change them as necessary.
While holding
down
Item
Class
Item
"Baud rate"
Parameter
"9600 bps"
Press twice
press
END
START

13
4.1. Display and keys
The STABLE indicator turns on to indicate that the parameter displayed is in effect.
Selects a class or item.
Changes the parameter.
When a class is displayed, moves to an item in the class.
When an item is displayed, stores the new parameter and displays the next class.
When an item is displayed, cancels the new parameter and displays the next class.
When a class is displayed, exits the function setting mode and returns to the
weighing mode.
4.2. Function table
Class
Item and Parameter
Description
Environment
Display
Decimal point
position
-Not fixed
Displays the decimal point position of the
weight data received.
Fixed
Fixes the decimal point at the set digit. Even if
the minimum display is switched using the
SAMPLE
key, the decimal point position
does not change. For details, refer to “6.2
.
Fixing of the Decimal Point Position”.
to
Sample key
function
Disabled Disables the SAMPLE key function.
Enabled Enables the SAMPLE key function.
Serial
interface
Baud rate
600 bps
Set the same value as that of the weighing
instrument to be connected.
1200 bps
2400 bps
4800 bps
9600 bps
19200 bps
Factory setting

14
4.3. Initializing the AD-8923-BCD
Initialization restores the function settings of the AD-8923-BCD to factory settings.
Operation
1. Turn the power on. or weighing mode display appears.
2. While holding down the ON:OFF key, press the PRINT
key. is displayed.
3. Press the PRINT key.
To cancel this operation, press the CAL key.
4. Press the RE-ZERO key to select “ ”.
5. Press the PRINT key to perform initialization.
After initialization, or weighing mode display appears.
ON:OFF
PRINT
PRINT
RE-ZERO
PRINT
Press
While
holding down
Press
Press
Press

15
9876
(Va)
(Vs)
SG
TXD
RXD
(CTS)
(RTS)
(DSR)
54321
AD-8923-CC
interior
Inch screw
(#4-40UNC)
To the weighing instrument
5. RS-232C CONNECTOR
5.1. RS-232C serial interface specifications
RS-232C
Transmission system: EIA RS-232C
Transmission form : Asynchronous, bi-directional, half duplex
Data format : Baud rate : 600, 1200, 2400, 4800, 9600, 19200 bps
Data bits : 7 or 8 bits
Parity : EVEN, ODD (Data bits 7 bits)
NONE (Data bits 8 bits)
Stop bits : 1 bit or 2 bits
Code : ASCII
Terminator : <CR> or <CR><LF>
Circuit
Connection to the weighing instrument
D-Sub 9-pin male
Pin
No.
Signal
name
Direction Description
1 (Vs) −Used internally
2 RXD Input Receive data
3 TXD Output Transmit data
4 −−
N.C.
5 SG −
Signal ground
6 (DSR) Input
Used internally
7 (RTS) Output
Used internally
8 (CTS) Input
Used internally
9 (Va) −
Used internally
(The AD-8923-BCD is a DTE device. Connect
to a DCE device such as the weighing
instruments, using a straight through cable.)
Note
When the user prepares a cable, do not connect to the pins that are used internally.
0123456
LSB MSB
1
0
-5V to -15V
+5V to +15V
RS-232C
Stop bit
Parity bit
Start bit
Data bits

16
6. BCD OUTPUT CONNECTOR
Outputs the weighing data received from the weighing instrument in BCD format, along with the polarity
(+/-) and the data status (stable/unstable and over (E display)).
Using the STROBE signal, the data can be read easily. BUSY input enables the data to be held or
prevents data refreshing during the reading operation.
Contact inputs are RE-ZERO and ON/OFF. They have same function as the key switches on the front panel.
6.1. Connector Pin No and Specifications
I/O connector of the rear panel
Pin assignments and I/O logic
Output pin assignments
Input pin assignments
Pin No.
Signal
Pin No.
Signal
26
1
100
Data
7
BUSY
27
2
9
RE-ZERO
Switch
28
4
5
ON/OFF
29
8
3
Input signal GND
39
1
101
11
Do not use
40
2
- The pins, which are not specified, have no
connection. (2, 4, 6, 8, 10, 36, 38 pin)
41
4
42
8
12
1
102
Output logic
13
2
Output logic (Factory settings)
14
4
Data
ON
15
8
Polarity
Positive or zero
ON
16
1
103
Stability
Stabilization indicator ON
ON
17
2
Over
,
ON
18
4
Strobe
Changing data
ON*
19
8
* When changing OFF ON, replaces the data.
20
1
104
- All output, open collector; withstand voltage 30 V;
21
2
no pull-up resistor; low-level output current 10 mA
22
4
23
8
46
1
105
47
2
48
4
49
8
24
1
106
25
2
30
4
31
8
32
1
107
33
2
34
4
Input logic
35
8
BUSY
Data will be held during ON
(when connected to input signal GND).
50
Polarity
Status
45
Stability
Switch
Switch will be performed with ON
(when connected to input signal GND).
44
Over
input
43 Strobe
Controlling
signals
- All input, no voltage contact or open collector
(connected to 5 V internally)
1
Output signal GND
Housing
Frame ground
Half pitch 50 pin
50 26
1
25
Balance
interior
07
Output pins
BCD
signals
Pin 1
BCD signals
(Data from 10 -1 to 10 -8, Polarity,
Stability, OVER, Status, Strobe)
Output signal GND
Use a shielded cable.
Housing (Cable shield)
FG

17
Plug (Provided)
Part name
Product number
Manufacturer
Over mold cover
DX30M-50-CV
Hirose Electric
Plug unit (Soldered type)
DX40M-50P
Note: The products above are subject to be replaced with the equivalent.
Cable
Wire size
AWG #28
Core configuration
7/0.127
O.D. of insulator
0.58
Note: Use a shielded cable. Connect the shield to the connector case.
I/O timing chart
The factory setting of Tstr (Strobe pulse width) is approx. 10 msec. The BCD data should be
acquired approximately 5 msec after the strobe changes from ON to OFF.
* - “All input pins ON”, is the condition, where all input signals are connected to GND (Pin 3).
- When inputting RE-ZERO for 100 msec, the weighing instrument maintains the re-zero state.
ON
OFF
1
0
ON
OFF
ON
OFF
Tstr
Tstr
100msec
After RE-ZERO
ON
OFF
Receive data
(RS-232C)
BCD output
STROBE
BUSY*
RE-ZERO*
Balance interior
Input signalGND 3
+5V
4.7kΩ
Housing (Cable shield)
When a photocoupler is used
Input terminal
(Upon switch-ON, makethe voltage
between the input terminal and the
input signal GND terminal 0.2V or less)
When a switch is used
(1)
(2)
5, 9, 7 pin
Input signal GND
FG
FG
RE-ZERO, ON/OFF, BUSY
5, 9, 7 pin
Input signal GND

18
Flow chart for inputting data
When inputting BCD data, follow the flow chart listed below.
S
trobe change
from ON to OFF
5msec after
Input BCD data
START
END

19
6.2. Fixing of the Decimal Point Position
The AD-8923-BCD can set the display digit and the BCD output digit by setting of the function.
When fixing the decimal point position, the BCD output digit does not change if changing the minimum
display digit by pressing the SAMPLE key.
Example 1) When not fixing the decimal point position. ( )
[Factory setting]
Key
Balance output
AD-8923-BCD display
BCD output
00012346
00123456
Note
: space 20h
When changing the minimum display digit by pressing SAMPLE key, the BCD shifts the
output left and adds the last digit.
Example 2) When fixing the decimal point at the third digit position. ( )
Key
Balance output
AD-8923-BCD display
BCD output
00123460
00123456
Note
: space 20h
When changing the minimum display digit by pressing the SAMPLE key, the BCD output
does not change the number of digits.
If the balance outputs RS-232C weighing data that exceeds six digits, the AD-8923-BCD does
not display the high-end digits. (The BCD data is output.)
STABLE FAST MID.
RESPONSE
SLOW
STABLE FAST MID.
RESPONSE
SLOW
STABLE FAST MID.
RESPONSE
SLOW
STABLE FAST MID.
RESPONSE
SLOW

20
7. TROUBLESHOOTING
Symptom
Description
appears.
Communication settings of the AD-8923-BCD do not match with those of
the weighing instrument.
Check the settings such as baud rate and parity and correct them as
necessary. For details, refer to “3.1. Setting the weighing instrument and
the AD-8923-BCD”.
(Bar display)
remains and the weight
value is not displayed.
Is the data output mode of the weighing instrument set to “stream mode”?
In a mode other than “stream mode”, the weight values are displayed
only when they are transmitted.
Check if the communication settings are correct.
Check if the cables are the correct type and are not damaged.
The display flickers. Electrical noise may cause this symptom.
Ground the FG terminal located on the rear of the AD-8923-BCD.
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