10 CPU Unit Functions
10-98
CJ2 CPU Unit Software User’s Manual
The status of the synchronous unit operation can be checked from the Synchronous Operation Status
Dialog Box in the CX-Programmer or from the SYNC indicators on the Synchronous Units.
z CX-Programmer
Place the CX-Programmer online with a PLC that is using synchronous unit operation and select
PLC - Edit - Synchronous Operation Status from the PLC Information Menu. The Synchronous
Operation Status Dialog Box shown below will be displayed.
10-8-9 Adjusting and Troubleshooting Synchronous Unit Operation
Checking Synchronous Unit Operation Status
Item Description
Synchronous
Processing Time
Synchronous Cycle
Time Settings
The value that is set for the synchronous operation cycle.
Maximum Value and
Present Value
The maximum synchronous operation cycle time to the present and
the present synchronous operation cycle time.
Synchronous Process-
ing Time Over
The number of times that the synchronous processing time of the
CPU Unit has exceeded the set synchronous operation cycle time.
This value is cleared when the PLC is started.
Synchronous Data
Send Error (CPU)
The number of times that the CPU Unit failed to send synchronous
data to the Synchronous Units.
This value is cleared when the PLC is started.
Cycle Time Maximum Value and
Present Value
The maximum and present values of the normal cycle time.
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