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Errors and Alarm Troubleshooting Section 7-1
7-1 Errors and Alarm Troubleshooting
7-1-1 Judging Errors by Indicators
Note (1) No Loop-control CPU Unit (CJ1G-CPU@@P).
RDY
COMM
EXEC
Indicator Name Color Status Description
RDY Ready Green Not lit The Loop Controller is not operating for one of the following reasons:
• A Fatal Inner Board Error occurred (A40112 ON.)
• Initialization is not completed yet.
• A fatal error occurred.
• The flash memory backup data is invalid.
• The Loop Controller is initializing.
• A hardware failure occurred in the Loop Controller.
• Power is not being supplied from the Power Supply Unit.
• A Loop Controller WDT error occurred.
Flashing • A WDT error occurred in the CPU Unit.
Lit The Loop Controller is ready for operation.
EXEC Running Green Not lit The system is stopped for one of the following reasons:
• The Loop Controller is initializing.
• A hardware failure occurred in the Loop Controller.
• Power is not being supplied from the Power Supply Unit.
• A Loop Controller WDT error occurred.
• The Loop Controller is not running.
• Data is being written to flash memory.
Flashing
at 0.5-s
intervals
Data is being deleted from Process-control CPU Unit (CS1D-CPU@@P)
flash memory.
Flashing
at 0.2-s
intervals
Function block data is being backed up to flash memory.
Lit The Loop Controller is running.
COMM Commu-
nicating
Yellow Not lit Waiting for data transfer.
Flashing Transferring data.
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