此系统为317 CPU控制，DP总线上有很多FESTO的分布式IO和菲尼克斯的温度控制模块。故障现象为设备工作过程中CPU突然停止运行，检查发现CPU上的SF灯亮，CPU STOP。

诊断信息如下：
iagnostic buffer of module CPU317-2

Order No./ Des cription Component Version
6ES7 317-2AJ10-0AB0 Hardware 3
- - - Firmware V 2.1.6

Rack: 0
Slot: 2
Event 1 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 320
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
04:27:08.481 AM 03/22/2014
(Coding: 16# 2942 017A 0020 0140 0000 0000)


Event 2 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 360
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
04:27:08.481 AM 03/22/2014
(Coding: 16# 2942 017A 0020 0168 0000 0000)


Event 3 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 362
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
04:27:08.481 AM 03/22/2014
(Coding: 16# 2942 017A 0020 016A 0000 0000)


Event 4 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 330
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
04:27:08.480 AM 03/22/2014
(Coding: 16# 2942 017A 0020 014A 0000 0000)


Event 5 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 318
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
04:27:08.480 AM 03/22/2014
(Coding: 16# 2942 017A 0020 013E 0000 0000)

诊断信息中：P area, word access, Access address: 330，这些指的是什么呢？具体的模块地址吗？这个地址哪里可以查到？

这个问题会是哪里故障引起的？