我们单位有一个S7-414-3DP的cpu下挂了连个IM153-1(DP 4号和5号)机架,现在想再继续增加一个IM153-1(DP,6号)机架。
6号机架中第一个通道为DO32*24V,第二个通道为DI32*24V.使用的上位机软件为STEP7 V5.5 SP2, 当硬件下下去之后,CPU就无法工作。诊断数据如下:
Diagnostic buffer of module CPU 414-3 DP
Order No./ Description Component Version
6ES7 414-3XJ04-0AB0 Hardware 2
- - - Firmware V 4.1.0
Rack: 0
Slot: 3
Serial number: SVPT8378675
Event 1 of 112: Event ID 16# 39C4
Distributed I/Os: station Failure
Address of the affected DP slave: station number: 5
DP master system ID: 1
Log. base address of the DP slave: Input address: 8186
Log. base address of the DP master: 8191
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Incoming event
12:44:18.087 PM 11/13/2012
(Coding: 16# 39C4 FE56 C054 1FFF 1FFA 0105)
Event 2 of 112: Event ID 16# 38C7
Distributed I/Os: station operational again, but error(s) in module parameter assignment
Address of the affected DP slave: station number: 5
DP master system ID: 1
Log. base address of the DP slave: Input address: 8186
Log. base address of the DP master: 8191
Requested OB: Rack failure OB (OB86)
OB not found, or disabled, or cannot be started in the current operating mode
External error, Outgoing event
12:44:18.086 PM 11/13/2012
(Coding: 16# 38C7 FE56 C054 1FFF 1FFA 0105)
Event 3 of 112: Event ID 16# 5961
Parameter assignment error in parameters for distributed S7 modules
Output address: 544 of the module with parameter assignment errors
Error type: Slot configured for CPU is not occupied or is occupied by a place holder, or a station has failed or the switched I/O system has lost its redundancy.
Data record number: 0
Operating mode: STOP (internal)
External error, Incoming event
12:44:18.084 PM 11/13/2012
(Coding: 16# 5961 FF04 C17B 007A 8220 0005)
Event 4 of 112: Event ID 16# 5961
Parameter assignment error in parameters for distributed S7 modules
Output address: 528 of the module with parameter assignment errors
Error type: Slot configured for CPU is not occupied or is occupied by a place holder, or a station has failed or the switched I/O system has lost its redundancy.
Data record number: 0
Operating mode: STOP (internal)
External error, Incoming event
12:44:18.083 PM 11/13/2012
(Coding: 16# 5961 FF04 C17B 007A 8210 0005)
............
如果再次将5号机架的DP插头拨到ON位置,并重新下原来的组态(就是把6号从站的硬件组态删除了),CPU就显示一切正常。
但是就算是组态错误,为何错误是发生在原有的5号从站上面呢?
另外,OB85, 0B86, OB121, OB122这些我都是有写入CPU的。
请高手帮助分析下,原因何在,谢谢。
最佳答案
1、新增加的6号DP从站,硬件拨码地址是否正确
2、5号从站DP的终端电阻拨为OFF,新增的6号从站终端电阻拨为ON
3、通讯速率和通讯距离的问题
对照下面看下:
9.6 kbps 到187.5 kbps: 1000 米
500 Kbaud: 400 米
1.5 Mbaud: 200 米
3 Mbaud 到12 Mbaud :100 米
4、更该通讯方式。
让CPU处于中间位置,DP接头终端电阻拨为OFF,两端的DP从站设备终端电阻拨为ON,试一试!
5、注意硬件组态的型号和版本要和实际事物型号和版本相对应。
提问者对于答案的评价:
谢谢。你说的很对。我把速率降到187.5kps的时候就一切正常了。
但是,说实话,我以前遇到的DP通讯不稳定,仅仅是某个时间段,或者说是一天也就几次故障。
这次这个是完全无法通讯的,还是第一次遇到。
这个车间有好几年了,可能接地系统老化了,我已经安排再从接地桩上引一根16平方的接地线上来。
原创文章,作者:more0621,如若转载,请注明出处:https://www.zhaoplc.com/plc243692.html