CPU 315 2DP/PN 地址为2 2047
带了1个ET200M从站地址3 2042
1个EM227 从站地址4
1个ET200M从站地址5 2040
CPU 老是自动停机，加入OB86和OB122后不停机但是CPU SF灯仍然亮
是否可以判断时候我的主从站的 PROFIBUS DP通讯问题呢？下面是CPU诊断信息，请高手帮忙分析是什么问题！
Diagnostic buffer of module CPU 315-2 PN/DP
Order No./ Description Component Version
6ES7 315-2EH14-0AB0 Hardware 4
- - - Firmware V 3.2.7
Boot Loader Firmware expansion A 32.9.9
Rack: 0
Slot: 2
Serial number: S C-C7UF67812012
Event 1 of 112: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 3
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)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
09:38:04.087 AM 11/26/2012
(Coding: 16# 38C4 FE56 C054 07FF 07FB 0103)
Event 2 of 112: Event ID 16# 456F
STOP caused by rack failure (OB not loaded or not possible, or no FRB)
Previous operating mode: RUN
Requested operating mode: STOP (internal)
Internal error, Incoming event
09:38:03.169 AM 11/26/2012
(Coding: 16# 456F FF84 0000 0101 0000 0000)
Event 3 of 112: Event ID 16# 39C4
Distributed I/Os: station Failure
Address of the affected DP slave: station number: 3
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, Incoming event
09:38:03.166 AM 11/26/2012
(Coding: 16# 39C4 1A56 C054 07FF 07FB 0103)
最佳答案
Event 3 of 112: Event ID 16# 39C4
Distributed I/Os: station Failure
Address of the affected DP slave: station number: 3
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)
从上述信息可以看出是3#站的机架故障。一般原因：
、模板前连接器与模板，模板与U型总线连接器，U型总线连接器与导轨，这些之间的安装不紧固。
、接口模块有硬件故障。
、整个站的供电电源不正常。
提问者对于答案的评价：
首先谢谢这位老师，但是还有点问题，我加入了OB86和OB122块但是还是出现停机现象。3号站的数字量模块有输出，模块之间的U型连接总线都紧固过了。DP线也没问题，要不ET200M会报警。现在问题是从站的ET200M不报警，模拟量模块BF灯也正常。还会有什么原因呢？
原创文章，作者：more0621，如若转载，请注明出处：https://www.zhaoplc.com/plc243378.html
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