3/4/2011 5:05 PM | |
Posts: 15 Rating: (0) |
HI all, I have no idea, how to program my PLCs , so they be able to communicate over their DP ports, I got a 315-2DP master and the same CPU slave, connected via their DP port (NOT CP card) and all I could find in internet, was sample programs for CP cards. Are they basically the same (programing-wise i mean)? Secondly, I must hand over datas from a third PLC through my slave CPU to the master one. First part with Ethernet and second by DP(as mentioned above). Can anyone tell me how should I do that? I have no access to any PLCs, because I am doing it for a friend and I am actually in another country as him! So I can not test anything here, BUT the program will be tested in good hands! The configuration is attached. Thanks all PS: I have no data from station(1). I just know there is a Siemens PLC and an Ethernet Card and two DBs (send and receive) which should be read and written. At last, can I pass all the DBs one by one through DP or should I make just ONE DB of all the datas??
AttachmentMyconfig.zip (598 Downloads) |
3/4/2011 5:37 PM | |
Joined: 9/27/2006 Last visit: 10/4/2024 Posts: 12283 Rating: (2685)
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Hello gama; On your first item, here are some links you could find useful: S7-400 master with S7-300 slave configuration example :http://support.automation.siemens.com/WW/view/en/6518822 Simply change the type of S& CPU in the example to the CPUs you need in your application, the example still applies without modification. As a footnote, here is a table of possible Profibusmaster-slave combinations, with appropriate program examples:http://support.automation.siemens.com/WW/view/en/7764609 For youe Ethernet exchanges, you could select any CP 343-1 (one per CPU rack) but the CP 343-1 Lean is the cheapest (as far as price) option and will do the job well. Here is information on the CP 343-1 Lean module: http://support.automation.siemens.com/WW/view/en/23523142 FCs and FBs for communication (see chapter 2: Ethernet): http://support.automation.siemens.com/WW/view/en/30564821 And in the following link you will find various programming examples for Ethernet communications: |
Last edited by: dchartier at: 3/4/2011 5:40 PM |
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This contribution was helpful to3 thankful Users |
12/26/2017 8:07 PM | |
Joined: 6/19/2017 Last visit: 9/6/2024 Posts: 8175 Rating: (172) |
New question published by Gujaa is split to a separate thread with the subject Example project with SCADA system in profibus network with 2 PLC. Best regards |
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