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Modbus communication with Sentron PAC3100 RS485 Module to S7 400 Communication with two quary sample program
Created by: SREE_4U at: 6/25/2011 2:20 PM (1 Replies)
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| 6/25/2011 4:07 PM | |
Joined: 9/27/2006 Last visit: 3/26/2025 Posts: 12344 Rating:
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Hello Sree; You will need to setup a Modbus RTU master in the S7-400 rack, which means inserting a CP 441-2 (with a Modbus master loadable driver) in the CPu rack, or a CP341 (with the same loadable driver) in a ET 200M Profibus slave, or even a 1SI Modbus module in a ET 200S system. The Modbus master program will vary a bit depending on the selected hardware. What hardware have you thought of using, at this point in the project? CP 441-2: http://support.automation.siemens.com/WW/view/en/22302279 CP 341: http://support.automation.siemens.com/WW/view/en/24284824/133200 Loadable driver: http://support.automation.siemens.com/WW/view/en/4072784 ET 200S 1SI: http://support.automation.siemens.com/WW/view/en/26263724 Hope this helps, Daniel Chartier |
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