在线看cpu报错信息 :

ack: 0
Slot: 2
Event 1 of 120: Event ID 16# 2523
Area length error when writing
Global DB, word access, Access address: 254
FC number: 70
Module address: 354
Requested OB: Programming error OB (OB121)
Priority class: 1
Internal error, Incoming event
08:45:23.874 AM 04/15/2011