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about Y-Link

Created by: me88 at: 10/24/2010 3:12 PM (4 Replies)

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10/24/2010 3:12 PM	Rate (0)
me88 Posts: 5 Rating: (0)	hi what is Y-Link used for exactly? and i couldnt find any technical data(pdf) about it(like:6ES7197-1LA03-0XA0) thanks
me88 Posts: 5 Rating: (0)	Last edited by: me88 at: 10/24/2010 3:13 PM
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10/24/2010 3:46 PM	Rate (1)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 3/27/2025 Posts: 12344 Rating: (2709)	Hello me88; The purpose of the Y-Link is to connect normal Profibus-DP slaves to redundant Profibus-DP Masters that are required for the operation of a S7-400H system. Since "normal" DP slaves only have a single connection to Profibus, you need a module that will automatically switch the Profibus master line in case of redundant CPU failure. The Y-link uses 2 IM-153-2 and a Y-coupler on a "active" backplane for the S7-300 system. Each IM-153-2 is connected to a different Probibus line (connected to only one S7-400Hredundant master), and the Y-coupler is connected top the normal Profibus slave downstream. The small pdf below will show you details on the Y-Link, even though it speacks of IM 157 instea of IM 153-2é. It is an older manual, and modules have evolved slightly since then. But the principles work the same today. More details can be foung in the Industry mall link that follows, Look especially in the Product Information tab for the Y-Link: https://eb.automation.siemens.com/goos/catalog/Pages/ProductData.aspx?nodeID=9990035&catalogRegion=ww&language=en&regionUrl=%2f#activetab=order Hope this helps, Daniel Chartier Attachment Y_LINK_E.pdf (586 Downloads)

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This contribution was helpful to 2 thankful Users Krrish !! me88

10/24/2010 4:54 PM	Rate (1)
gre_m Posts: 947 Rating: (45)	Hello me88 Small additional info: exist 3 modidfication Y-link: - old, based on IM157; - new 1, based on im153, used LA03 in MTBF; -new 2. used LA13 in MTBF. It's can send time to slave. All modely-Link can't send\|receivemore 244 byte.
gre_m Posts: 947 Rating: (45)
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10/26/2010 10:14 AM	Rate (0)
me88 Posts: 5 Rating: (0)	hello if the concept of 244 Byte is that Y-Link just canprocess 244*8=1952 digital I/O? and whats the advantage of Y-Link compare to IM157(just) in H systems?when ive to use it in H and and its vital?
me88 Posts: 5 Rating: (0)	Last edited by: me88 at: 10/26/2010 10:21 AM Last edited by: me88 at: 10/26/2010 10:18 AM
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10/26/2010 2:31 PM	Rate (1)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 3/27/2025 Posts: 12344 Rating: (2709)	Hello me88; The 244 bytes OUT/244 bytes IN limit for the Y-Link exists because it is considered a single Profibus slave on the redundant Profibus-DP network. If you look at any Profibus slave you will see that the exchange area limit is exactly the same. This is extracted fromthe Distributed IO, ET 200M manual: 2.3 Support for I/O modules with expanded input data ... For the ET 200M, this means that: … ● The total amount of input data must not exceed the following values: – 128 bytes per slot – 244 bytes per IM 153-2BAx2. i.e., per ET 200M. These limits are checked during configuration. So, as far as the redundant masters is concerned, whatever slavesare setup behind the Y-Link (the downstream singe-interface slaves) do not exist. There is only a single slave, the Y-link, and it can exchange as any slave the 244 bytes OUT/IN limit. But the Y-link has 2 DP-slave interfaces, so it can be connected to whatever redundant master is operative at any moment. If you want to use standard I/O modules for your digital or analog processing, you can also use redundant ET 200M slave units(comprising an active backplane for2 x IM 153-2 and each I/O module required). The only reason you would want to use a Y-link with redundant S7-400H system is to be able to connect Profibud-DP slaves that are not redundant, such as drives, protection relays, simocodes, etc,,, to the redundant DP-masters so that they will be switched from one DP-master to another if there is a CPU failure. Hope this helps, Daniel Chartier
	Last edited by: dchartier at: 10/26/2010 2:34 PM
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