现场已生产2年，300主站（ID：2），200从站（ID：4），通过profibus通讯。
现场人员改线时，将接触器线圈线误接到300上一个I点，然后出现各种通讯不正常，
后查看是电脑内缺少了文件，现已都正常通讯。
OB86，OB121，OB122等都下载

问题：
现场开启某些电机（不确定）时，300报SF故障。
诊断：

Diagnostic buffer of module CPU 313C-2 DP

Order No./ Des cription Component Version
6ES7 313-6CF03-0AB0 Hardware 2
- - - Firmware V 2.6.11
Boot Loader Firmware expansion A 0.21.0

Rack: 0
Slot: 2


Event 1 of 100: Event ID 16# 4548
STOP caused by I/O management
Previous operating mode: RUN
Requested operating mode: STOP (internal)
Internal error, Incoming event
12:27:53.567 AM 05/23/1996


Event 2 of 100: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Outgoing event
12:08:52.594 AM 05/23/1996


Event 3 of 100: Event ID 16# 3842
Module OK
Module type: Distributed I/0s
Input address: 1022
User information available
Diagnostic interrupt from substitute
Requested OB: Diagnostic interrupt OB (OB82)
Priority class: 26
External error, Outgoing event
12:08:52.549 AM 05/23/1996


Event 4 of 100: Event ID 16# 39C4
Distributed I/Os: station Failure
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Incoming event
12:07:32.594 AM 05/23/1996


Event 5 of 100: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Outgoing event
12:06:40.146 AM 05/23/1996


Event 6 of 100: Event ID 16# 3842
Module OK
Module type: Distributed I/0s
Input address: 1022
User information available
Diagnostic interrupt from substitute
Requested OB: Diagnostic interrupt OB (OB82)
Priority class: 26
External error, Outgoing event
12:06:40.105 AM 05/23/1996


Event 7 of 100: Event ID 16# 39C4
Distributed I/Os: station Failure
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Incoming event
12:03:59.542 AM 05/23/1996


Event 8 of 100: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Outgoing event
11:45:14.915 PM 05/22/1996


Event 9 of 100: Event ID 16# 3842
Module OK
Module type: Distributed I/0s
Input address: 1022
User information available
Diagnostic interrupt from substitute
Requested OB: Diagnostic interrupt OB (OB82)
Priority class: 26
External error, Outgoing event
11:45:14.871 PM 05/22/1996


Event 10 of 100: Event ID 16# 39C4
Distributed I/Os: station Failure
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Incoming event
11:45:14.835 PM 05/22/1996


Event 11 of 100: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Outgoing event
11:45:14.378 PM 05/22/1996


Event 12 of 100: Event ID 16# 3842
Module OK
Module type: Distributed I/0s
Input address: 1022
User information available
Diagnostic interrupt from substitute
Requested OB: Diagnostic interrupt OB (OB82)
Priority class: 26
External error, Outgoing event
11:45:14.338 PM 05/22/1996


Event 13 of 100: Event ID 16# 39C4
Distributed I/Os: station Failure
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Incoming event
11:45:14.310 PM 05/22/1996


Event 14 of 100: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Outgoing event
11:45:09.814 PM 05/22/1996


Event 15 of 100: Event ID 16# 3842
Module OK
Module type: Distributed I/0s
Input address: 1022
User information available
Diagnostic interrupt from substitute
Requested OB: Diagnostic interrupt OB (OB82)
Priority class: 26
External error, Outgoing event
11:45:09.782 PM 05/22/1996


Event 16 of 100: Event ID 16# 39C4
Distributed I/Os: station Failure
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Incoming event
11:45:09.745 PM 05/22/1996


Event 17 of 100: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 4
DP master system ID: 1
Log. base address of the DP slave: Input address: 1022
Log. base address of the DP master: 1023
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Outgoing event
11:45:09.146 PM 05/22/1996



请各位帮忙，分析下原因，谢谢！！