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问题

系统SF灯常亮

精

奖

官

5385 产品版区：S7-300(F)/400(F)/400H(冗余)

文档类型：问题类别：产品选型问题类别：产品使用问题类别：故障诊断

接手别人的一台设备,CPU315通过DP带IM174，另外通过CP340与第三方设备通讯，通过PROFINET I/O带ET200，发现系统SF灯长期亮，偶尔会出现不亮的现象,CPU诊断区：
area error when writing
area error when writing
area error when writing
area error when writing
Diagnostic buffer of module CPU 315-2 PN/DP

Order No./ Description         Component                      Version
6ES7 315-2EH14-0AB0            Hardware                       4
- - -                          Firmware                       V 3.2.6
Boot Loader                    Firmware expansion             A 32.9.9

Rack: 0
Slot: 2

Serial number: S C-BDTR82872011

Event 1 of 10:  Event ID 16# 2525
Area error when writing
Incorrect area ID:    3
Requested OB: Programming error OB (OB121)
Priority class:  1
Internal error, Incoming event
04:27:18.484 PM  10/19/2012

Event 2 of 10:  Event ID 16# 2525
Area error when writing
Incorrect area ID:    0
Requested OB: Programming error OB (OB121)
Priority class:  1
Internal error, Incoming event
04:27:18.484 PM  10/19/2012

Event 3 of 10:  Event ID 16# 2525
Area error when writing
Incorrect area ID:    3
Requested OB: Programming error OB (OB121)
Priority class:  1
Internal error, Incoming event
04:27:18.313 PM  10/19/2012

Event 4 of 10:  Event ID 16# 2525
Area error when writing
Incorrect area ID:    0
Requested OB: Programming error OB (OB121)
Priority class:  1
Internal error, Incoming event
04:27:18.313 PM  10/19/2012

Event 5 of 10:  Event ID 16# 2525
Area error when writing
Incorrect area ID:    3
Requested OB: Programming error OB (OB121)
Priority class:  1
Internal error, Incoming event
04:27:18.142 PM  10/19/2012

Event 6 of 10:  Event ID 16# 2525
Area error when writing
Incorrect area ID:    0
Requested OB: Programming error OB (OB121)
Priority class:  1
Internal error, Incoming event
04:27:18.142 PM  10/19/2012

Event 7 of 10:  Event ID 16# 2525
Area error when writing
Incorrect area ID:    3
Requested OB: Programming error OB (OB121)
Priority class:  1
Internal error, Incoming event
04:27:17.974 PM  10/19/2012

Event 8 of 10:  Event ID 16# 2525
Area error when writing
Incorrect area ID:    0
Requested OB: Programming error OB (OB121)
Priority class:  1
Internal error, Incoming event
04:27:17.973 PM  10/19/2012

Event 9 of 10:  Event ID 16# 2525
Area error when writing
Incorrect area ID:    3
Requested OB: Programming error OB (OB121)
Priority class:  1
Internal error, Incoming event
04:27:17.811 PM  10/19/2012

Event 10 of 10:  Event ID 16# 2525
Area error when writing
Incorrect area ID:    0
Requested OB: Programming error OB (OB121)
Priority class:  1
Internal error, Incoming event
04:27:17.811 PM  10/19/2012

各个从站只有都正常，不亮红灯，但IM174从站以前也老是亮SF灯，现在不亮了，其STATUS： Module available and o.k 但是诊断缓冲区里有watchdog activated
请教大侠：
1. CPU经常亮SF灯这到底是什么原因？如何解决？？？
2. CPU偶尔不亮红灯了，正常了，这又是啥原因？
3.根据IM174的状态和诊断缓冲区，IM174正常吗？？、

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1. CPU经常亮SF灯这到底是什么原因？如何解决？？？
Area error when writing
Incorrect area ID: 0
Requested OB: Programming error OB (OB121)
根据上述信息表明是当系统进行写操作时发生区域错误，引起了编程错误（OB121编程错误）。
如何解决？
编制诊断程序，见：
《通过FB126诊断PROFINET IO系统》下载：
http://www2.ad.siemens.com.cn/download/Upload/AS/application/A0257.pdf
参见《使用OB8x诊断SIMATIC PLC》：
http://www2.ad.siemens.com.cn/download/Upload/AS/application/A0059.zip
2、 CPU偶尔不亮红灯了，正常了，这又是啥原因？
楼主自己讲：各个从站只有都正常，不亮红灯。各个从站只有都正常就是整个系统正常了，自然就不亮红灯了。即没有发生上述错误时就正常了。
3、根据IM174的状态和诊断缓冲区，IM174正常吗？？
哪个是IM174的状态和诊断缓冲区？不明白楼主的意思。