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TroubleshootingFP2−CCU
5 − 3
5.1 Operation if an Error Occurs
5.1 Operation if an Error Occurs
5.1.1 If the ALARM LED on the Computer Communication Unit Lights
What the ALARM LED does
The ALARM LED on the Computer Communication Unit lights if the watchdog timer in
the unit is activated, to warn of a problem.
CCU
SDRD ERRSDRDERRALARM
CCU
COM.1 COM.2
ALARM LED
CPU unit operation when the ALARM LED lights
The ERROR LED on the CPU unit lights, and operation stops.
The error code to be checked using programming tools or other means is 41 (intelligent
unit error).
If it is necessary to continue operation, change the setting of the CPU unit system
register 22.