We have S7-414H system. We found master CPU all LEDs were flashing. The alarm sequence from diagnostic buffer are as follows:
Switchover of master CPU and standby CPU
Switchover of standby CPU and master CPU
(CPU affected standby CPU in rack 0, Event: Defective: stop not possible, Requested OB: CPU redundancy error OB(OB72), OB not found or disabled or cannot be stared in the current operation mode, incoming mode)
Defective: stop not accessible
(8184 40 da 008a, Previous operating mode: RUN(redundant mode), Requested operating mode: Defective, Event occurred in the master CPU in rack o, Internal error: Incoming event)
Master CPU: Change from redundant mode to solo made.
After resetting with memory resetting the CPU signals & LEDs beome.ok.
My question is what is the cause and why all LED were flashing and where to be checked for finding the cause.
Switchover of master CPU and standby CPU
Switchover of standby CPU and master CPU
(CPU affected standby CPU in rack 0, Event: Defective: stop not possible, Requested OB: CPU redundancy error OB(OB72), OB not found or disabled or cannot be stared in the current operation mode, incoming mode)
Defective: stop not accessible
(8184 40 da 008a, Previous operating mode: RUN(redundant mode), Requested operating mode: Defective, Event occurred in the master CPU in rack o, Internal error: Incoming event)
Master CPU: Change from redundant mode to solo made.
After resetting with memory resetting the CPU signals & LEDs beome.ok.
My question is what is the cause and why all LED were flashing and where to be checked for finding the cause.