现有一组417H组成的PLC,这段时间频繁出现备用PLC停机,大概4-5天就会出现此现象,只能把备用PLC重启才能恢复,不知如何解决,望各位大侠指教
PLC报错内容如下


Event 10 of 2214: Event ID 16# 43DA
STOP due to synchronization error between H CPUs
Previous operating mode: RUN (redundant mode)
Requested operating mode: STOP (internal)
Event occurred in the standby CPU in rack 1
Incoming event
06:43:21:696 pm 12/28/06


Event 11 of 2214: Event ID 16# 43E3
Master CPU: Change from redundant mode to solo mode
Previous operating mode: RUN (redundant mode)
Requested operating mode: RUN
Event occurred in the master CPU in rack 0
Incoming event
06:43:21:695 pm 12/28/06


Event 12 of 2214: Event ID 16# 7301
Loss of redundancy (2oo2) due to CPU failure
CPU affected: Standby CPU in rack 1
Requested OB: CPU redundancy error OB (OB72)
Priority class: 28
Incoming event
06:43:21:695 pm 12/28/06