What kind of other module do I need to make my labview support OPC?

[ztyaner11]

In the palette of my Labview 7.0 I didn't see any function related to OPC, Is there any free module I can download?

[ztyaner11]

In other's computer I make use of  "tag engine" to connect with OPC server, But I don't know where I can get the "tag engine"?

[Donald]

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@ztyaner11 wrote:
In other's computer I make use of  "tag engine" to connect with OPC server, But I don't know where I can get the "tag engine"?

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The tag engine is part of LabVIEW's Datalogging and Supervisory Control Module (LVDSC). It is not free. With plain LabVIEW (i.e. without the DSC module) you can connect to an OPC server using Datasocket. There is an example on this shipped with LabVIEW. Search the examples for "OPC", "Datasocket" or "Datasocket OPC". And note that the performance of using Datasocket<>OPC degrades is poor if you have more than ~50 tags.