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Communication between S7 300 and ABB DCS400 drive, via MODBUS
Created by: dorin74 at: 12/10/2012 7:50 PM (3 Replies)
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| 12/10/2012 9:37 PM | |
Joined: 9/27/2006 Last visit: 3/23/2025 Posts: 12344 Rating:
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Hello dorin; Start withthe CP 341/441-2 Modbus master manual; please refer to it whenever you have issues with Modbus programming: SIMATIC S7-300/S7-400 Loadable Driver for Point-to-Point CPs: MODBUS protocol, RTU format, S7 is master If you have little experience with Modbus, or need a quickrefresher, i strongly recommend reading our friend smiffy's excellent presentation of Modbus: Next look at the information provided by ABB for their drive, and select the registers you want to transfer to the PLC Modbus master: Modbus Adapter Inst/Start-up Guide Then download DR75’s sample projectfor one Modbus master and 3 slaves in the following link; study the mechanics of the program (from what you have picked up in the manual)so you can expand it to your number of slaves: /tf/WW/en/Posts/16268 Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 12/10/2012 9:50 PMLast edited by: dchartier at: 12/10/2012 9:43 PM |
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| 12/11/2012 1:33 PM | |
Joined: 8/2/2009 Last visit: 3/21/2025 Posts: 18 Rating:
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Dear Daniel Chartier, thank you for very useful answer. I will study the documents you suggested. regards, Dorin Serban |
| 9/30/2015 3:52 PM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4766 Rating:
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New question published by mehdi607 is split to a separate thread with the subject S7-300 PLC and 14 ABB drives profibus network. Best regards |
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