8/30/2013 7:21 AM | |
Joined: 9/27/2006 Last visit: 10/17/2024 Posts: 12289 Rating: (2687) |
Hello micoy; The best document on OLMs (optical link modules) that will help you build a ring topology over Profibus-DP can be found in the following manual: SIMATIC NET PROFIBUS Optical Link Module |
8/30/2013 8:51 AM | |
Posts: 10 Rating: (0) |
Hi again dchartier, Follow up question, kindly refer to the attached file. For that kind of network do you think, it will work?
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8/30/2013 9:58 AM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
Hi Mecoy Pl see my old post on a similar requirement, Only this time we were trying to connect to a S7-300 CPU and not a Y-Link. The are some excellent observations by J_Belland dchartierbesides others. I found the suggestionto also use a Profihubmodule to increase the reliability of your network as the best for the application. This way you can individual Profibus cables for each valve, hopefully improving the network availability. Hope this helps. Cheers Navnag |
There is no such thing as the last bug in a program |
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8/30/2013 7:46 PM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
Hi micoy Yes this configuration with OLMs is probably closest to what you are looking for. Somehow,I am not convinced that this improves the availability of the system in any significant way and it really worth the extra cost. Good luck to you. Cheers Navnag |
There is no such thing as the last bug in a program |
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9/1/2013 9:37 AM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
Hi micoy The previous configuration that you posted is perfectly good and does not require any further improvements. It does meet your customer's requirement and is Technically feasible. I had only questioned whether the extra cost involed in implementing this solution is really worth it ?? If cost is not a consideration for you, then youcan go ahead with it. I would additionally suggest that you should use redundant +24VDC supply for all the OLMs. These OLMs have the capability of taking 24VDC power supplies from two different sources. Good Luck to you. Cheers Navnag |
There is no such thing as the last bug in a program |
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This contribution was helpful to1 thankful Users |
9/2/2013 1:37 PM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
Hello micoy You could also use PA Slaves instead of DP Slaves, in which case you can use DP/PA coupler with Redundant DP/PA Link. ( Pl see attachment ). This way you would actually have a True redundant ring and probably exactly what your customer is looking for. It should not be too difficult to source Control Valves with PA interface. Here is the Manual ( Section 4.1.3.4 ) Hope this helps Cheers Navnag AttachmentDP_PA_Redundancy.pdf (190 Downloads) |
Last edited by: Navnag at: 9/2/2013 1:37 PMTypos corrected There is no such thing as the last bug in a program |
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