Answer question
AC800M Controller fault - error code 4030
In one of the customer sites, there is a PM866 in redundant configuration. The backup CPU has suddenly gone in to fault mode. We have tried to init restart the backup controller. But it come back in fault mode. Since the log points at module bus inaccessible, We checked the optic fibre connectivity and looks like there is no breakage.
We checked the RCU link between the primary and backup controllers and it seems fine.
The log reads the error codes as below:
E 2018-01-31 13:00:06.151: 4008 P:RCUMessHalt Lower CPU
E 2018-01-31 13:00:06.047 Unit= _SWTargets XXXSS_~troller 4030 Stopped ModuleBus inaccessible Backup CPU
E 2018-01-31 13:00:06.149 Unit= _SWTargets XXXSS_~troller 4004 P:BkpNotAlive in Synch
E 2018-01-31 13:00:06.150 Unit= _SWTargets XXXSS_~troller 4008 P:RCUMessHalt Lower CPU
The 'RCUMessHalt Lower CPU' is logged first. However as per the time stamp the error code 4030 occurred first.
Can you please help me what could possibly be the issue.
