最近几天车间有台设备频繁自动停车 在线看PLC模块信息如下：

Diagnostic buffer of module CPU 315-2 DP

Order No./ Des cription Component Version
6ES7 315-2AH14-0AB0 Hardware 3
- - - Firmware V 3.3.2
Boot Loader Firmware expansion A 32.9.9

Rack: 0
Slot: 2


Serial number: S C-B8UP37742011


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: 2043
Log. base address of the DP master: 2047
Requested OB: Rack failure OB (OB86)
Priority class: 26
External error, Outgoing event
01:47:18.645 PM 04/17/2012


Event 2 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 78
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
01:47:18.627 PM 04/17/2012


Event 3 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 76
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
01:47:18.627 PM 04/17/2012


Event 4 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 74
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
01:47:18.627 PM 04/17/2012


Event 5 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 68
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
01:47:18.627 PM 04/17/2012


Event 6 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 66
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
01:47:18.627 PM 04/17/2012


Event 7 of 10: Event ID 16# 2942
I/O access error, reading
P area, byte access, Access address: 64
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
01:47:18.627 PM 04/17/2012


Event 8 of 10: Event ID 16# 2942
I/O access error, reading
P area, byte access, Access address: 63
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
01:47:18.627 PM 04/17/2012


Event 9 of 10: Event ID 16# 2942
I/O access error, reading
P area, byte access, Access address: 62
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
01:47:18.627 PM 04/17/2012


Event 10 of 10: Event ID 16# 2942
I/O access error, reading
P area, byte access, Access address: 61
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event

看了报警信息之后感觉是DP通讯问题，处理了所有通讯站点的DP头，线路，测量阻值也很正常，更换了6站的通讯板 和相关模块 地线也重新接了 但是仍然频繁报上面的故障

各位前辈能否看看模块信息，如何解决？ 非常感激！

PS：DP总线总共挂了15个站