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9/29/2011 6:00 PM | |
Joined: 9/27/2006 Last visit: 9/21/2024 Posts: 12282 Rating: (2684) |
Hello Amit; In Siemens' world, the only way to have redundant Profibus comms between a S7-400H system (as a master) and a S7-300 (or any other type of slave) is through a Y-Link. The following FAQ provides a typical configuration: How do you configure an S7-300 CPU or a CP342-5 as DP slave to an S7-400H as DP master using a Y-link? You will be limited to exchanges of 244 bytes OUT/ 244 bytes In, as the data limit for a Y-Link is that of a single Profibus slave. Hope this helps, Daniel Chartier |
9/30/2011 11:52 PM | |
Joined: 9/27/2006 Last visit: 9/21/2024 Posts: 12282 Rating: (2684) |
Hello Amit; Yes, you can use a DP/DP coupler (connected to the S7-300 CPU's DP master port) as a slave on the y-Link. See other members sharing their experience on that configuration: /tf/WW/en/Posts/35422 Note that you can also add a CP 342-5 as a DP slave interface on the S7-300 CPU, as shown in the link provided in my first post. Hope this helps, Daniel Chartier |
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