DataSocket Connections for OPC Items

Updated Apr 19, 2023

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I have multiple OPC items that I would like to read with DataSocket. Are new DataSocket connections required for each OPC item?

Yes, a new DataSocket connection is required for each individual OPC Item. You may look at the screenshot below for an example.

DataSocket only support one OPC item per connection.
Connecting in ReadAutoUpdate mode may increase performance when reading multiple items on the same OPC server, as the server will send all notifications of new data in one packet.
OPC data can also be read using Shared Variables.
For communication with large number of connections, the LabVIEW Datalogging & Supervisory Control (DSC) Module or NI OPC Servers may be a better fit.
You can also find shipping examples as a good starting point. Go to LabVIEW » Help » Find examples... and search for Monitor OPC Items with Datasocket.vi

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