下面是从cpu中导出的信息，哪位可以告知这个故障的原因以及一般的处理方法，谢了！
Diagnostic buffer of module CPU 315-2 DP

Order No./ Des cription Component Version
6ES7 315-2AG10-0AB0 Hardware 4
- - - Firmware V 2.0.10

Rack: 0
Slot: 2


Event 1 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 128
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
06:06:06:193 am 10/10/98


Event 2 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 130
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
06:06:06:191 am 10/10/98