下面是诊断缓冲区信息：帮忙分析一下：
Diagnostic buffer of module CPU 412-2 DP

Order No./ Des cription Component Version
6ES7 412-2XJ05-0AB0 Hardware 3
- - - Firmware V 5.1.1


Event 1 of 118: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 85
FC number: 203
Module address: 16
OB number: 122
Priority class: 1
External error, Incoming event
12:20:33:683 am 12/23/94
to楼上：重新送电，还是不会清除的。