Methods for communication with OPC Server

[piZviZ]

There are many ways to communication with OPC server. Which method is suitable when there are approx 400-700 tags and there are possibility that same tag require to run in different vi's parallel ?

1. Shared variable node and front panel bounding  ?

2. Shared variable block diagram (Read variable.vi and write variable.vi) ?

3. DataSocket ?

4. OPC UA Toolkit

[wiebe@CARYA]

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@piZviZ wrote:

 and there are possibility that same tag require to run in different vi's parallel ?

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Not sure what that means. I don't think that should make a difference.

AFAIK, OPC is slow, no matter what you use. The number of tags would not be a concern, at least not if there's no time restrains.