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communicate S7300 PLC with my S7400 PLC through modbus communication
Created by: Import-User-1 at: 3/17/2011 11:02 AM (1 Replies)
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| 3/17/2011 1:29 PM | |
Joined: 9/27/2006 Last visit: 3/23/2025 Posts: 12344 Rating:
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Hello; Modbus is not native to Siemens PLCs, so you need specially designed drivers working over specific communication processors to implement Modbus code on the S7 PLCs. Also, there are various flavours of Modbus, serial (RTU or ASCII) or TCP/IP, . So you will have to determine what exactly you plan to do. For some basic information, start with these links: Manuals CP 341/CP 441-2 loadable drivers, Modbus RTU, using a hardware dongle on the CPs: Master: http://support.automation.siemens.com/WW/view/en/1220184 Slave: http://support.automation.siemens.com/WW/view/en/1218007 Software downloads for Modbus RTU: https://support.automation.siemens.com/WW/llisapi.dll?query=loadable+drivers+CP+341&func=cslib.cssearch&content=adsearch%2Fadsearch.aspx%3Ftab%3D2&lang=en&siteid=csius&objaction=cssearch&searchinprim=_searchinprim_&nodeid=99&x=16&y=8&cssearchengine=NEW For Modbus/TCP using CP 343-1/CP 443-1 Ethernet processors (or PN ports integrated on the CPUs), look at Open Modbus/TCP description and links:http://support.automation.siemens.com/WW/view/en/22660304 Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 3/17/2011 1:31 PM |
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