BobChuck wrote:
I would like to know if a Data Highway Plus PC Interface card, 1784-PKTX with a PCI slot and communication rate of 230K bit/s can be interfaced with LabView? This card is an Allen Bradely produtct. I also need to know if there is a Data socket in LabView for this card and what drivers would be needed for this?
As David has pointed out, you could use AB's RSLinx OPC server ... or you can shop around for other OPC servers (e.g. Kepware here , Matrikon probably has one, etc., etc.) that support the 1784-PKTX.
In the examples that ship with LV6.1, there's a demonstration of using Datasocket to read values from OPC servers (search the examples for "Datasocket" and choose the "Datasocket OPC" item).
A key question is: How may tags/IO/data registers/items do you need to sample?
Each datasocket connection to the OPC server acts like a seperate client connection and it slows down as the number increases. Mileage varies depending on the application, but numbers like 30, 50, or 100 tags have been mentioned as the upper limit. (Randomly picked old thread).
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