Omron CJ2 - 02-2010 User Manual page 428

10 CPU Unit Functions
Additional Information
If even one of the Synchronous Unit is restarted during synchronous unit operation, the synchro-
nous operation cycle will be stopped and all Synchronous Units will be restarted. Synchronous
unit operation will be restarted only after all Synchronous Units have restarted normally.
Adjustments and Troubleshooting
Adjustments, change as changing the synchronous operation cycle time, are necessary for the prob-
lems described in the following table.
Synchronous opera-
tion status on CX-
Programmer
Synchronous Pro-
cessing Time Area
Synchronous Unit
Status Area
10-98
Problem
A Synchronous Process-
ing Time Over Error
occurs frequently.
A Synchronous Data Send
Error (CPU) occurs.
A Synchronous Data Send
Error (UNIT) occurs fre-
quently.
A Synchronous Process-
ing Time Over Warning
occurs
Cause
Synchronous operation pro-
cessing (synchronous data
refreshing plus synchro-
nous interrupt task execu-
tion) could not be completed
within the synchronous
operation cycle.
A hardware error occurred in
the CPU Unit.
The synchronous input data
set from the Synchronous
Unit to the CPU Unit could
not be prepared before the
synchronous input data
refresh period.
Internal processing in the
Synchronous Unit could not
be completed before the end
of the synchronous opera-
tion cycle.
CJ2 CPU Unit Software User's Manual
Remedy
Set the synchronous opera-
tion cycle time longer than
the synchronous operation
processing time (synchro-
nous data refresh times plus
synchronous interrupt task
execution time).
Replace the CPU Unit.
Set the synchronous opera-
tion cycle time to longer than
the internal processing time
of the Synchronous Unit.
Set the synchronous opera-
tion cycle time to longer than
the internal processing time
of the Synchronous Unit.