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How to achieve redundant profibus communication in slave device?
Created by: Diana.S at: 6/23/2010 6:41 PM (4 Replies)
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| 6/23/2010 6:41 PM | |
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Posts: 19 Rating:
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Dear all, I would like to achieve redundancy for my slave devices communincation. From my attach topology, if OLM 2 fails, OLM 3 will communicates with the rest of the slaves. If OLM 3 fails, then OLM 2 will takes over to comunicate with the rest of the slaves. Will this set up possible? If in between slaves 2 & 3 profibus cable break off, is there any possibility that OLM 2 communicates to slave 1 & 2 and OLM 3 communicates to salve 3 & 4? Will be very grateful if any expert can help me. Thank you! Diana.S AttachmentTopology.pdf (303 Downloads) |
| 6/23/2010 7:33 PM | |
Joined: 9/27/2006 Last visit: 3/19/2025 Posts: 12344 Rating:
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Hello Diana; Here are a few documents you can look at to further your understanding of OLMs and profibus-DP redundant rings: Setup of redundant ring (Profibus) with OLMs: http://support.automation.siemens.com/WW/view/en/19758281 Bus parameters with redundant ring: http://support.automation.siemens.com/WW/view/en/1995199 OLM v. 4 manual: http://support.automation.siemens.com/WW/view/en/30006392 Maximum number of nodes per OLM in a redundant ring: /tf/WW/en/Posts/27295 One very important thing you will notice in every representation on the redundant ring topology: you cannot connect the RS-485 in a parallel "ring" to the OLM.Effectively you can connect up to 11 nodes to each OLM RS-485 port without overtaxing the bus communication parameters (see the last link), but you must no attemp to close the loopwith the copper Profibus cable.. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 6/23/2010 7:33 PM |
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