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| 8/15/2012 9:39 AM | |
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Posts: 2 Rating:
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Hello all! I got a prblem with Profibus and IM153 modules. My configuration is a S7-414 CPU with Profibus connection (16 stations; 1 AddFEM, 13 IM153 and 2 black boxes). The fault shows as follows: When the CPU is in operation the system is fault free, after a while I get problems with Profibus connection on IM153 modules. This is not all the time at the same module, it is changing; also the fault is sometimes only on one station, somtimes on more in one line. In that case the BF1 led is flashing very fast (no specific speed). Sometimes the fault comes first on the active line and sometimes on the standby. Sometimes a changeover from master is working sometimes not and all signals of this row are lost or coming and going like the BF1 fault. So far all addresses were double checked and also profibus plug were inspected. HW configuration indicates no fault and Simatic manager diagnostics show only generals fault, but no specific data what could be the root cause. Also for testing one CPU was exchanges with no change. Does somebody know this kind of problem or how to get closer to the root cause? King regards, Henning Bär. PS: please find attached a sample video AttachmentC:\temp\2\Sample.zip (132 Downloads) |
Last edited by: Henning Bär at: 8/15/2012 9:42 AMLast edited by: Henning Bär at: 8/15/2012 9:41 AM |
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| 8/16/2012 7:47 AM | |
Joined: 10/7/2005 Last visit: 3/18/2025 Posts: 3042 Rating:
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Hello Henning Bär I suggest you get yourself a Profibus Analyzer to see what exactly is going on on your Profibus. There are various ones out there, but being biased towards PROCENTEC I suggest you have a look at the following two: 1.) ProfiTrace 2: This is the Engineers tool to do all and any sort of ad-hoc Profibustroubleshooting and Analysis and hasn't let me down in many many years of using it. 2.) COMbricks: A COMbricks based bus monitoring solution would become a permanent part of your installationand would in your case have a couple of advantages: 1.) One COMbricks can monitor 2 (headstation 1B) or 4 (headstation 1C) networks at the same time. As you ave redundant Networks, a COMbricks with headstation 1B and two single channel Scope repeaterswould be ideal for your purpose (and is also available as a available as a "Starter kit"). 2.) Configure them to log any events that happen on either Network as well as send out e-mail alerts for each Event (e.g. retries, corrupted messages etc.) and you'll have a24/7 "Network doctor"whose information will (should) help you in determining what the root cause of your problem is. I hope this helps |
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Cheers |
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