CJ2 CPU Unit Software User's Manual - CIP ETI

10 CPU Unit FunctionsAdditional InformationIf even one of the Synchronous Unit is restarted during synchronous unit operation, the synchronousoperation cycle will be stopped and all Synchronous Units will be restarted. Synchronousunit operation will be restarted only after all Synchronous Units have restarted normally.Adjustments and TroubleshootingAdjustments, change as changing the synchronous operation cycle time, are necessary for the problemsdescribed in the following table.Synchronous operationstatus on CX-ProgrammerSynchronous ProcessingTime AreaSynchronous UnitStatus AreaProblem Cause RemedyA Synchronous ProcessingTime Over Erroroccurs frequently.A Synchronous Data SendError (CPU) occurs.A Synchronous Data SendError (UNIT) occurs frequently.A Synchronous ProcessingTime Over WarningoccursSynchronous operation processing(synchronous datarefreshing plus synchronousinterrupt task execution)could not be completedwithin the synchronousoperation cycle.A hardware error occurred inthe CPU Unit.The synchronous input dataset from the SynchronousUnit to the CPU Unit couldnot be prepared before thesynchronous input datarefresh period.Internal processing in theSynchronous Unit could notbe completed before the endof the synchronous operationcycle.Set the synchronous operationcycle time longer thanthe synchronous operationprocessing time (synchronousdata refresh times plussynchronous interrupt taskexecution time).Replace the CPU Unit.Set the synchronous operationcycle time to longer thanthe internal processing timeof the Synchronous Unit.Set the synchronous operationcycle time to longer thanthe internal processing timeof the Synchronous Unit.10-98 CJ2 CPU Unit Software User’s Manual