10-101
10 CPU Unit Functions
CJ2 CPU Unit Software User’s Manual
10-8 Synchronous Unit
Operation
10
10-8-9 Adjusting and Troubleshooting Synchronous Unit Operation
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, change as changing the synchronous operation cycle time, are necessary for the prob-
lems described in the following table.
Adjustments and Troubleshooting
Synchronous opera-
tion status on CX-
Programmer
Problem Cause Remedy
Synchronous Pro-
cessing Time Area
A Synchronous Process-
ing Time Over Error
occurs frequently.
Synchronous operation pro-
cessing (synchronous data
refreshing plus synchro-
nous interrupt task execu-
tion) could not be completed
within the synchronous
operation cycle.
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).
A Synchronous Data Send
Error (CPU) occurs.
A hardware error occurred in
the CPU Unit.
Replace the CPU Unit.
Synchronous Unit
Status Area
A Synchronous Data Send
Error (UNIT) occurs fre-
quently.
The synchronous input data
set from the Synchronous
Unit to the CPU Unit could
not be prepared before the
synchronous input data
refresh period.
Set the synchronous opera-
tion cycle time to longer than
the internal processing time
of the Synchronous Unit.
A Synchronous Process-
ing Time Over Warning
occurs
Internal processing in the
Synchronous Unit could not
be completed before the end
of the synchronous opera-
tion cycle.
Set the synchronous opera-
tion cycle time to longer than
the internal processing time
of the Synchronous Unit.
To Next Page
Loading...
Need help?
General