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controlling G3 control panel from scheider electric
Created by: carl talley at: 9/12/2008 6:07 PM (5 Replies)
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| 9/13/2008 6:48 AM | |
Joined: 9/27/2006 Last visit: 2/14/2025 Posts: 12336 Rating:
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Hello Carl; Since you are already looking at Modbus to (MPI/Profibus?) converters, your planinvolves eventually you being able to read/write values on the G3 panel into the PLC. The status/contol of the breakers will be programmed in the CPU 315, through the Step 7 programming software. This is the first step. By the way, Anybus is a very repected name in protocol converters and systems. There are a few others you can look aton the web (SST, Fieldserver..), and Siemens also offers direct Modbus master/slave communications, either on a CP 341 (with special loadable drivers) or on a ET 200S 1SI serial card. Just more options for you to look at. Now, if I understand you correctly, you already have a WinCC installation connected to this CPU and already communicating. If that is the case, all (?) you have to do is open the configuration package (CS development license) of the WinCC, look at the Tag Management editor, and add the new tags (register addresses and symbols of the PLC) you have developped for the breaker control functions in thePLC into the WinCC program. Then it is a matter of creating the screens you need in the Graphics Editor, where you will place yourimages (symbols for the different breakers)and animations (status color changes, output fields showing values from the panel, command buttons to control events), and generating new alarmsand trends as required. The Getting Started manual for WinCC should give you a good idea of the work involved once the PLC program has been implemented and tested: http://support.automation.siemens.com/WW/view/en/29221062 By the way, WinCC packages are licensed based on the number of external tags are used between the PLC and the SCADA package (WinCC); the amount of used tags is displayed on the WinCC main running screen. You will need to take into account the number of available tags on your package and determine whether you will need to upgrade to a larger tag package eventually. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 9/13/2008 6:54 AM |
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| 9/14/2008 6:03 AM | |
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Joined: 9/27/2006 Last visit: 2/14/2025 Posts: 12336 Rating:
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Hello Carl; If you need to connect WinCC directly to the breaker controller program or the database, there are also a few options you could look at. There is a Modbus protocol suite that we hadused for WinCC version 5 and 6 (you didn't say if you knew the actual version used in your project). It is an add-on protocol that you vcan get from the developper, here (excerpt from one of the Siemens FAQs): The "Modbus Serial" channel is not included in the basic package of WinCC. You can procure this channel from the engineering consultants Ingenieurbüro Allmendinger(www.allmendinger.de). There is also an OPC channel in the WinCC protocol suite, so you could use it to connect to the SQL database registers, for example. Since it can be setuup either as a server or a client, you would have a great deal of flexibility. Once you connect to the panel's registers, the work in the WinCC project will be the same as described in the earlier post. Hope this helps, Daniel Chartier |
| 9/15/2008 4:16 PM | |
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Posts: 487 Rating:
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What database do you have with G3 system? If it is ODBC compliant, then take a look at the link below. http://support.automation.siemens.com/WW/view/en/16514261 It is an exampleof reading value fromMS accessand writing to a WinCC tag. The same technic can be used with any ODBC compliant database. There are also some examples in WinCCinformation system. Let me know if you need to know anything else. |
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