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Created by: micoy at: 8/28/2013 9:55 AM (4 Replies)

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8/28/2013 9:55 AM	Rate (0)
micoy Posts: 10 Rating: (0)	Can you help me? Please I need youre expertise on this part. Technical Issues: I have a S7400H for a redundant system, and I have this Y-Link (Y-Coupler) connected to S7400H DP master. Within the Y-Link network it has a Motorized Valves (9 units) connected by means of daisy chain. However, my client is requesting me to have a LOOP connection for the MV it self, or more likely he is anticipating a broken network at the daisy chain. For some reason the area is critical in operation, he want me to provide/expand another Y-coupler module and insert it to the existing Y-link. This is to satisfy its loop connection. Instead of terminating the last unit (MV) by a terminator resistor, he want me to connect it to the expanded Y-Coupler to sustain the Loop Connection. My question is, it is possible to expand the Y-Link? and add another Y-coupler module to have a closed loop network, instead of having a Daisy Chain network? Thank you in advance and sorry for the inconvinience. ^_^V Sincerely, micoy
micoy Posts: 10 Rating: (0)
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8/28/2013 10:29 AM	Rate (0)
Rated X Posts: 1547 Rating: (128)	Hello, unfortunately it is not possible to connect two Y-Link to the same DP-Slave. A Slave can only be connected from one cyclic DP Master. If you need redundancy, then you must add also a redundant Slave. Only possibility you have is to install a redundant Ring behind the Link to get bus redundancy but you can add a redundant Link to this configuration. For this you have to install an OLM Ring configuration with optical fibre. PS: Thanks for posting here
Rated X Posts: 1547 Rating: (128)
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8/28/2013 11:13 AM	Rate (0)
micoy Posts: 10 Rating: (0)	Hi Rated X, This will take a minute, If you don't mind can you inspect the attachment file for me. There is a details here that my PENSTOCK (MV) were connceted in a Y-LINK Network. I have run through reading that the DP/PA link has a DP/PA coupler with ring redundancy in the redundant DP/PA link. Do you think it is feasable to use 6ES7-157-0AC83-0XA0 (DP/PA COUPLER) as a replacementY-LINK network. Just for me to have a Ring Network for the PENSTOCK. Although, I already take for consideration the OLM you have mention a while ago. But still do you think that it will work on DP/PA coupler? Or there are many things for us to considerate before the instrument (Typically Motorized Valves)in Y-link network will also work in DP/PA network. Thank you so very much. Attachment y-link revised.jpg (84 Downloads)
micoy Posts: 10 Rating: (0)
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8/28/2013 11:54 AM	Rate (0)
dchartier Grandmaster Joined: 9/27/2006 Last visit: 3/6/2021 Posts: 10472 Rating: (2216)	Hello micoy; Unfortunately you cannot use DP/PA equipment to connect a DP-slave in a redundant fashion. As mentioned before by our friend Rated X, the only option for redundant connection for a Profibus-DP slave is a Profibus ring topology, using OLMs. Hope this helps, Daniel Chartier
	Last edited by: dchartier at: 8/28/2013 11:54 AM
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8/30/2013 9:21 AM	Rate (0)
Blue Moderator Moderator Joined: 4/21/2006 Last visit: 2/12/2021 Posts: 517 Rating: (24)	The new question was splitted to a new thread: ring topologies for the DP-slave using either of Y-link and DP/PA

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