设备每次停机后CPU报警SF（报警信息如下所示），重启CPU后报警消除，什么原因？怎么解决？万分谢谢！
Diagnostic buffer of module CPU 317-2 DP
Order No./ Description Component Version
6ES7 317-2AJ10-0AB0 Hardware 5
- - - Firmware V 2.6.0
Boot Loader Firmware expansion A 10.13.9
Rack: 0
Slot: 2
Serial number: S C-VNE203912007
Event 1 of 10: Event ID 16# 2943
I/O access error, writing
P area, double-word access, Access address: 280
Requested OB: I/O access error OB (OB122)
Priority class: 12
External error, Incoming event
12:13:14.200 AM 09/04/1998
(Coding: 16# 2943 0C7A 0030 0118 0000 0000)
Event 2 of 10: Event ID 16# 2942
I/O access error, reading
P area, double-word access, Access address: 280
Requested OB: I/O access error OB (OB122)
Priority class: 12
External error, Incoming event
12:13:14.200 AM 09/04/1998
(Coding: 16# 2942 0C7A 0030 0118 0000 0000)
Event 3 of 10: Event ID 16# 2943
I/O access error, writing
P area, double-word access, Access address: 280
Requested OB: I/O access error OB (OB122)
Priority class: 12
External error, Incoming event
12:13:14.100 AM 09/04/1998
(Coding: 16# 2943 0C7A 0030 0118 0000 0000)
Event 4 of 10: Event ID 16# 2942
I/O access error, reading
P area, double-word access, Access address: 280
Requested OB: I/O access error OB (OB122)
Priority class: 12
External error, Incoming event
12:13:14.100 AM 09/04/1998
(Coding: 16# 2942 0C7A 0030 0118 0000 0000)
最佳答案
参见：为什么会出现“I/O访问错误”和“区域长度错误”
https://support.industry.siemens.com/cs/document/78943685/为什么会出现“io访问错误”和“区域长度错误”?dti=0&lc=zh-CN
提问者对于答案的评价：
谢谢！
专家置评
已阅，最佳答案正确。
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