LabVIEW 8.0 or later contains an OPC server called the Shared Variable Engine. The Shared Variable Engine supports OPC Data Access 2.x and OPC Data Access 3.0. You can publish data from the Shared Variable Engine using LabVIEW shared variables.
To connect to the Shared Variable Engine from a third-party OPC client, use the ProgID National Instruments.Variable Engine. If the OPC client allows you to browse for OPC servers, you can locate the National Instruments.Variable Engine under OPC version 2.x or 3.0, depending on which versions the client supports.
In the third-party OPC client, you can browse all data items published by the Shared Variable Engine. The Shared Variable Engine allows connections to scalars and arrays of scalars but does not recognize data items of complex data types, such as clusters. You can browse FieldPoint and DAQ data items under their device categories.