CPU诊断信息
Event 5 of 120: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 1
DP master system ID: 1
Log. base address of the DP slave: Input address: 16368
Log. base address of the DP master: 16383
Requested OB: Rack failure OB (OB86)
Priority class: 25
External error, Outgoing event
01:54:39:229 am 03/03/13
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Event 6 of 120: Event ID 16# 39B1
I/O access error when updating the process image input table
Access error occurred for consistent user data
process image partition no.: 0
start address of the affected I/O area: 734, area length: 8
Requested OB: Program execution error OB (OB85)
Priority class: 25
External error, Incoming event
01:54:39:215 am 03/03/13
Event 7 of 120: Event ID 16# 39B2
I/O access error when transferring the process image to the output modules
Access error occurred for consistent user data
process image partition no.: 0
start address of the affected I/O area: 734, area length: 8
Requested OB: Program execution error OB (OB85)
Priority class: 25
External error, Incoming event
01:54:39:215 am 03/03/13
最佳答案
主要原因应该是DP通讯中断引起。建议检查DP头接线、DP总线、DP终端电阻、DP总线屏蔽等通讯环节。
请参考：《DP从站通讯经常中断》
http://www.ad.siemens.com.cn/service/answer/solution.aspx?Q_ID=56018&cid=1029
《S7-400PLC的PROFIBUS-DP通讯问题》
http://www.ad.siemens.com.cn/service/answer/solution.aspx?Q_ID=51107&cid=1040
提问者对于答案的评价：
仍在解决中。。。。
原创文章，作者：more0621，如若转载，请注明出处：https://www.zhaoplc.com/plc241127.html
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