Omron V530-R160E User Manual page 206

SECTION 8
Communication with the Host
 1:N (Multi Drop) connection
Using a branching link adapter, one host can communicate with multiple controllers (up to 31).
The unit number is attached to the prefix of all communication data, so set a different unit number
for each V530-R160.
Refer to page 209.
After the V530-R160 reads a code, it holds the data without outputting it.
To output the data, issue a polling command.
Note that when the data is output, the controller performs the next reading operation and the pre-
viously read data is overwritten.
Example:
Input a command to controller No. 01 and obtain the result.
Branching
Link Adapter
Controller
Unit number 03
V530-R160
204
Operation Manual
Link Adapter
Branching
Link Adapter Link Adapter
Controller
Unit number 02 Unit number 01
Execute a command.
Execute a command.
The processing result
01ABCDEFG···(CR)
PC/AT computer
Branching
Controller
Input a command.
@GL 01(CR)
Input a data read
@RD 01(CR)
is returned.
The processing result
command.
is accepted.