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Maintenance
840 USE 106 00 January 2003 181
Additional Checks
Checking on a
Redundant
Power Supply
If you have a redundant power supply, you may use the STAT block to check its
operation. The redundant power supply must be I/O mapped for its status to be
displayed. The I/O module status section of the STAT block begins at word 12.
Responding to
and Recognizing
Errors
When a CHS 110 Hot Standby module experiences an error, it takes its controller
offline. It does not communicate with the other CHS 110 module or take part in state
RAM data transfers.
The LEDs on the front panel of the module can help you locate the source of the
error. The display pattern tells you which controller is experiencing problems and
what kind of error is occurring. There are four kinds of errors associated with the Hot
Standby system:
Startup errors
Communication errors
Communication errors
Interface errors
Board-level errors
For each type of error, try the suggested remedies in the order given. If no remedy
suggested here resolves the error, call Schneider Electric customer support at
1-800-468-5342 for further directions.