Omron CJ2 CPU UNIT - Error Causes and Remedies for Synchronous Unit Operation Settings

6 Troubleshooting
6-24
CJ2 CPU Unit Hardware User’s Manual
z Error Causes and Remedies for Synchronous Unit Operation Settings
z Error Causes and Remedies for Registered I/O Table Settings
Suspected cause of
error
Confirmation method Remedy
Prevention of recur-
rence
A Unit set in the synchro-
nous unit operation set-
tings does not support
synchronous unit opera-
tion.
Check the operation man-
ual for the Unit.
Transfer the settings
again.
Same as at the left.
A Unit set in the synchro-
nous unit operation set-
tings does not exist in the
PLC.
Check the Units in the
PLC.
Transfer the settings
again.
Same as at the left.
A Unit set in the synchro-
nous unit operation set-
tings does not exist on the
CPU Rack (i.e., it is on an
Expansion Rack).
Check the Units in the
PLC.
Move the Synchronous
Unit to the CPU Rack.
If I/O tables have been
registered, change the
registered I/O tables.
Same as at the left.
Suspected cause of
error
Confirmation method Remedy
Prevention of recur-
rence
The model of a CPU Bus
Unit in the registered I/O
tables is different from the
model the Unit actually
mounted in the PLC.
Check the Units in the
PLC.
Correct the I/O table set-
tings.
Same as at the left.