5
o
peration
5-4
1.1.4 Communication check (field network)
In a field network, always check that the communication state is normal before starting operation. When using
the host unit's communication status flag to monitor the communication state, allow a time delay of about
200ms after recognizing a normal state, and then start operation. If the time delay is short, the controller
output information may not be read correctly, so the operation cannot start normally.
Field network
Servo ON (SERVO)
Alarm (/ALM)
Communication status *
200ms or less
Data undefined region
Data undefined region
Communication error
23501-M0-00
* In the case of CC-Link, the time delay is not required if remote READY (R-RDY) is used to check whether the link state
is normal.
