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10.
Communication in Command Mode
・
Normally, one-to-many communication is enabled by adding a device address to the command communication when
performing one-to-one with the weighing device via RS-232C.
・
The available commands are the same as the RS-232C commands for each weighing device. For details, refer to the
instruction manual of the individual weighing device.
Caution
If multiple data is output from the weighing device at one time (time and date are added to the weighing value, etc.),
data loss may occur.
Preparing for communication
①
Set the following setting items so that the RS-232C of the weighing device and AD-8551R are the same.
Reference: Factory setting of the AD-4212C
/
AD-4212D
Setting item
Weighing device
AD-8551R
Baud rate
2400*, 4800, 9600, 19200 bps
Data bit
7 bit*
Parity
EVEN*
Stop bit
1 bit*
Terminator
<CR><LF>*
Data output format
A&D standard format*
―
Data output mode
⋆
1
、⋆
2
Setting to output the
weighing value with an
external command.
(key mode,etc.)
―
*
Factory setting of the AD-8551R (normally, factory settings of AD-4212C/AD-4212D are same)
⋆1.
If each weighing device is set to automatically output data (auto print, interval mode, etc), multiple devices
may communicate simultaneously with RS-485 and may not communicate normally.
⋆2.
With the AD-4212C, it is necessary to change the data output mode.
(
Refer to the individual device instruction manual for how to change.
)
②
Set the following setting items so that the RS-485 of the host (PLC, PC, etc.) and AD-8551R are the same.
Setting item
Host
(
PLC, PC.etc
)
AD-8551R
Baud rate
9600*, 19200, 38400, 115200 bps
Data bit
8 bit*
Parity
EVEN*, ODD, NONE
Stop bit
1 bit*
Terminator
<CR><LF>*
③
Refer to ”4-2 Connecting example”, ”5-2 Connections”, ”6-2 Connecting cable” for connecting.
・
Normally, when using the AD-4212C, power can be supplied from the RS-232C terminal, so connecting to the
power terminal is not required.
・
When connecting to the AD-4212D in command mode, connect to the AD-8551R using the AD-4212D PLC
connector.
⑤
Turn on the power for each device.