11/29/2013 3:26 PM |
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Joined: 5/29/2011 Last visit: 6/4/2024 Posts: 40 Rating:
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hello Dear Owei; NO , I only use port 2 in both CPU forcommunicating
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Control & Instrument Engineer |
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11/29/2013 4:47 PM | |
Joined: 9/27/2006 Last visit: 8/16/2024 Posts: 12277 Rating:
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Hello Navidl; See the attachment, a review of your Profibus design based on the information you have given up to now. First point, you have 2 masters, is there any reason you should join the 2 networks, I mean does master 2 controlany slavesin your segments 1,2 or 3? If master 2 only talks to slaves in segment 4, there is no need for a repeater joining the buses of the 2 CPU, since slaves in a Profibus network can only be owned by a single master (the inputs can be read by multiple masters, but the outputs cannot be controlled by another master on the bus but the one the slave was configured to originally). Second point: I would recommend that you do not connect the repeaters one to another. The simplest way to design an extended Profibus network is to put the repeaters serially, Basically the number of slaves and distances from master 1 do not seem to require repeaters, unless here are distances to cover that you did not mention. Third, for years it was considered a good practice to require a minimum cable of 1 meter between nodes, because of our bad experiences with such node cables. Now, the official documentation from Profibus.com will incorporate the 1 meter rule as part of the design considerations for Profibus-DP. Here is a link to the announcement, from the owner of Procentec, also a member of the Profibus working group: http://www.linkedin.com/groupItem?view=&gid=1669267&type=member&item=63153260&qid=7497bc68-8786-4c87-9908-0435759a01b8&trk=groups_search_item_list-0-b-ttl 1 Meter rule finally in the Installation Guidelines Manager's Choice Dennis van Booma Owner and CEO of PROCENTEC Finally, after years of requests, the 1 m rule will be described in the updated version of the PROFIBUS installation guidelines. We did another attempt with new applications and scientific evidence to support the case. The working group under leadership of professor Karl-Heinz Niemann had a positive vote and will insert a chapter that describes; the minimum distance of 1 meter PROFIBUS DP cable between 2 devices when the network runs on 1.5 Mbps (and higher). Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 11/29/2013 4:48 PM |
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2 thankful Users |
12/12/2013 1:11 PM | |
Joined: 4/24/2009 Last visit: 8/2/2024 Posts: 2682 Rating:
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New question splitted to profibus terminator Best regards O_Moderator |
3/10/2016 4:07 PM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating:
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New question published by Idir is split to a separate thread with the subject Profibus Network, bus fault in master and slave. Best regards |
8/8/2016 2:58 PM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating:
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New question published by yknott is split to a separate thread with the subject Profibus faults. Best regards |
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