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jlada

Datasockets and OPC

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Thanks to Michael for the new questions and support section.

I'm testing out datasockets to an A-B RSLinx OPC server. At the moment, it appears as though each register in the PLC has to be accessed with an individual URL. Is it possible to access a group of (sequential) registers with a single URL? I suspect i may have to cluster a bunch of individuals together.

Jeff :?:

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Thanks to Michael for the new questions and support section.

I'm testing out datasockets to an A-B RSLinx OPC server. At the moment, it appears as though each register in the PLC has to be accessed with an individual URL. Is it possible to access a group of (sequential) registers with a single URL? I suspect i may have to cluster a bunch of individuals together.

Jeff :?:

Jeff,

I asked around and I got the following response:

For each data member, you will need a unique URL. There is not a way to bundle them into one URL.

Randy Hoskin

Applications Engineer

National Instruments

Sorry,

Michael Aivaliotis

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In the same vein, Consolitech Corp sells stand alone OPC and ActiveX servers for PLC communications. I don't doubt that the OPC servers ($$) would work with Labview but, would the (less expensive) ActiveX servers be difficult to integrate into a Labview app?

http://www.consolitech.com/

Jeff

blog-2-1125287870.jpg?width=400

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If anyone else has this issue you should look at OPCWare Client Developer from Data Layers. I have used this OPC ActiveX for doing the OPC client communications in Labview. You can overcome all the limitations of the DataSocket while still leveraging all the power of OPC. Quite inexpensive, fast to develop and overall very satisfactory.

http://www.opcware.com/

NK

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