OPCWare Client Developer is the ActiveX OPC Client development toolkit for using Visual Basic, Visual C++, Delphi,.NET to connect software to process,. If you are developing an OPC UA Client. This code has very kindly been made available by Mark R. Drake of Everest Software and is updated for Delphi 2007. Delphi OPC client component set to develop OPC DA, XML DA, AE, UA and HDA clients.
Opc Client Software
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We are currently using a free trail version of KEP Server for our OPC to communicate with our PLC. We were wondering if anyone knows of any good open source OPC software.
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2 Answers
Some vendors offer OPC servers for free with their PLCs, but I haven't seen any free OPC servers that supports multiple vendors like KepWare OPC server does. Neither free (unless you count time limited ones), neither open source ones. That saying, the best bet you can get is to get Delphi and make your own OPC servers and clients with free sources found here. I am not aware of free OPC server sources for other languages.
avraavra
If you don't mind skipping the OPC server and communicating directly with the PLC you should have a look at libnodave.
grimmigOpc Client Tool
grimmigFree Opc Client Software
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