9/7/2020 1:08 PM | |
Joined: 5/24/2019 Last visit: 6/20/2023 Posts: 4 Rating: (0) |
Hi, The maximum data to be transfered between the slaves and the master are 244 bytes in total or 244 bytes per slave? Thanks! ------------------------------------------------------------------------------------------ |
Last edited by: Jen_Moderator at: 09/08/2020 08:25:47New subject after splitting |
|
9/7/2020 4:20 PM | |
Joined: 9/27/2006 Last visit: 9/20/2024 Posts: 12282 Rating: (2684) |
Hello gsevibeni; The amount of data exchanged between a Profibus master and a single slave has been fixed to 244 bytes, as per standard IEC 61158. This amount is for every slave configured in the network. I would suggest you register on the following site to download the System manual for Profibus. It presents important information such as the screenshot below shows. https://us.profinet.com/documentation/system-description-profibus-technology-and-application/ Hope this helps, |
This contribution was helpful to1 thankful Users |
9/8/2020 11:59 AM | |
Joined: 9/27/2006 Last visit: 9/20/2024 Posts: 12282 Rating: (2684) |
Hello gsevibeni; A Y-coupler is one of the modules used to create a Y-link, and it is the Y-link that allows connection of single-interface Profibus slaves to S7-400H redundant CPUs. The S7-400H sees the Y-link as a single Profibus slave, so it is limited to 244 bytes in its Profibus exchanges. All downstream slaves cannot be individually accessed from the S7-400H, and they must not exceed 244 bytes data exchanged. See this quote: "The max. configuration message frame length and the max. message frame lenght for I/O data are 244 bytes for each Y Link " https://support.industry.siemens.com/cs/us/en/view/6847578 Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 09/08/2020 13:15:25 |
|
Follow us on