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CPU Connected as ModBus Slave to CiTECT...
Created by: Tomy Master at: 7/16/2012 11:56 AM (7 Replies)
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| 7/16/2012 6:36 PM | |||||||
Joined: 9/27/2006 Last visit: 11/4/2024 Posts: 12293 Rating:
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Hello Tomy; I must admit that I have not worked with the newer versions of Citect, since it has been purchased by Schneider. But before this Citect had one of the best set of help files available for SCADA systems, and their Citect User Forum was often a very good source of information (almost as good as our own forum!). So do not hesitate to look for help and information on specific details of Citect coimmunication channels there. Now in my opinion using a Modbus RTU channel to communicate betqween a S7 PLC and Citect is taking the long way around. Both Siemens and Citectshare easier communication paths for their systems, at that time it was only MPI,Profibus and Industrial Ethernet, now i believe a Profinet channel is also available. A PN/DP CPU will have access to all these channels on its integrated interfaces; all S7 CPUs can use MPI without difficulty or additional hardware. That being said, if you really must use the Modbus RTU route, understand that on the S7 side you will need to start with the purchase of a serial CP 341, which you canfind with 3 different models depending on the selectedinterface:
On top of the CP 341 you will need to add a software driver for Modbus RTU slave; here is a link to the manual; you will find the part number of the driver (and dongle for the CP 341 inside), along with information on the programming requirements: SIMATIC S7-300/S7-400 Loadable Driver for Point-to-Point CPs: MODBUS Protocol, RTU format, S7 is Slave And here is some sample code, provided recently by forum member Amit_86, this should give you a hands-up on the work to be done: Modbus Slave (CP341) Sample Program- On the Citect side you will have to use their Modbus master driver, which is simple to setup (if it hasn't changed since I used it). Hope this helps, Daniel Chartier |
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Last edited by: dchartier at: 7/16/2012 10:22 PM |
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| 7/17/2012 6:26 PM | |
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Joined: 9/27/2006 Last visit: 11/4/2024 Posts: 12293 Rating:
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Hello Tomy; The CP 5611 A2 is still available and supported by the Softnet drivers; however, check out that iit is a PCI card, working under a 32-bit OS (that is a limitation of Simatic Net at this time). If you have a newer PCthat supports a PCI-Express processor, then you should look at the replacement CP 5612: CP 5612, PCI-Express (32-bit) Softnet processor CP 5611A2, PCI Softnet processor As I said before, the Citect User Forum was a great source of information on Citect drivers, and members would readily give hints from their own experience. It seems that Schneider has decided to maintain the format in their DriverWeb pages: http://www.citect.schneider-electric.com/index.php?option=com_content&view=article&id=1518&Itemid=1337 |
Last edited by: dchartier at: 7/17/2012 7:29 PM |
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| 7/24/2012 9:44 PM | |
Joined: 5/4/2009 Last visit: 5/28/2024 Posts: 914 Rating:
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Dear friend, In the case of using "CP5611", what "softwares" do I need along with CP5611. Thank you again. Tomy. |
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| 7/24/2012 9:59 PM | |
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Joined: 9/27/2006 Last visit: 11/4/2024 Posts: 12293 Rating:
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Hello Tomy; The driver for a CP 5611 would be the Softnet-S7 package in this case: http://support.automation.siemens.com/WW/view/en/46372366 Hope this helps, Daniel Chartier |
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