Module Information - CPU 313C "Diagnostic Buffer" Tab
Event 1 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 264
FC number: 16
Module address: 138
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
05:01:02.348 PM 08/20/2013

Event 2 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 260
FC number: 16
Module address: 86
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
05:01:02.348 PM 08/20/2013

报错信息如上所述，根据信息是piw260和piw264错误，可是我没用到过，硬件组态里也没有，因为用的是FC5，FC6，无法打开来看。不知道如何解决？