S7-300突然停机，SF灯亮，MPI通讯中断，
查PLC信息
Event 4 of 10: Event ID 16# 4301
Distributed I/Os: station return
Address of the affected DP slave: station number: 11
DP master system ID: 1
Log. base address of the DP slave: Input address: 1010
Log. base address of the DP master: 1023
OB number:(OB86)
OB not found,or disabled,or cannot be started in the current opertion mode: 25
External error, Outgoing event
01:07:33:407 pm 04/16/08