2/21/2011 11:24 AM | |
Joined: 3/18/2008 Last visit: 12/8/2023 Posts: 1750 Rating:
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Dear All, please help me to resolve this problem. AttachmentDATA.zip (507 Downloads) |
Last edited by: amit_86 at: 2/21/2011 11:26 AMVANDE MATARAM..... |
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3/2/2011 7:06 AM | |
Joined: 3/18/2008 Last visit: 12/8/2023 Posts: 1750 Rating:
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Dear Experts, Any Comment??? |
VANDE MATARAM..... |
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3/5/2011 4:10 PM | |
Posts: 344 Rating:
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Amit_86, Took a look at the project. The hardware configuration looks ok, except I was wondering why are you running Profibus communications at 9.6Kbps. Profibus is capable of going up to 12 Mbps? The problem you are having can be, most likely, attributed to poor/incorrect cabling. If the network will not operate at higher speed, this further confirms that hypothesis. I suggest, changing Profibus network settings to 12 Mbps and checking the physical integrity of the network: - Are correct Profibus cables used? Are they Siemens made? - Which connectors are used? Part no? - What is the total length of the Profibus network? Is it less then 100m? - What is the minimum cable length? Is it at least 1m? - Are terminators on Profibus connectors ON at both ends of the bus? Is it off on the middle connector? - Take apart connectors and make sure that terminations are made appropriately: wires are not cut, good connection to terminals/fast connect, shield connection between cable and connector is good. I am also including a PROFIBUS cabling guide for reference. If not done appropriately, sporadic bus failures will occur, much like you experiencing now. AttachmentPIC PROFIBUS Cabling Guide.pdf (606 Downloads) |
Last edited by: DenisMor at: 3/5/2011 4:12 PM |
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