这种问题我也遇到，故障现象没有这么频繁，偶尔出现一次，一个月差不多两次，但是每次停机都会造成损失，总是出现6号站丢失，换了所有的东西没有能解决问题，最后是给6号站单独DP过去才得以解决问题。

Diagnostic buffer of module CPU 315F-2PN/DP

Order No./ Description          Component                       Version                      

6ES7 315-2FJ14-0AB0             Hardware                        3                            

- - -                           Firmware                        V 3.2.3                      

Boot Loader                     Firmware expansion              A 32.9.9                     

Rack:                           0

Slot:                           2

Serial number: S C-B4UF40262011

Event 1 of 10:  Event ID 16# 38C4

Distributed I/Os: station return

Address of the affected DP slave: station number:    6

DP master system ID:      1

Log. base address of the DP slave: Input address:  2042

Log. base address of the DP master:   2047

Requested OB: Rack failure OB (OB86)

Priority class: 26

External error, Outgoing event

09:46:32.818 AM  05/26/2014

(Coding: 16# 38C4  1A56  C054  07FF  07FA  0106)

Event 2 of 10:  Event ID 16# 79E5

F-I/O passivated

- Monitoring time exceeded at the safety frame detected in the F-CPU

Logical base address:     32

F-I/O database number:    554

External error, Incoming event

09:46:32.625 AM  05/26/2014

(Coding: 16# 79E5  9F00  C47A  022A  0020  0002)

Event 3 of 10:  Event ID 16# 39C4

Distributed I/Os: station Failure

Address of the affected DP slave: station number:    6

DP master system ID:      1

Log. base address of the DP slave: Input address:  2042

Log. base address of the DP master:   2047

Requested OB: Rack failure OB (OB86)

Priority class: 26

External error, Incoming event

09:46:32.470 AM  05/26/2014

(Coding: 16# 39C4  1A56  C054  07FF  07FA  0106)

I10.0  I10.1 I10.2 是6号的点出现断线160ms