topic Running the same VI concurrently in LabVIEW

Running the same VI concurrently

Scotty Parker — Mon, 14 Jun 2004 01:25:14 GMT

How do I run the same VI from two different location in my block diagram. I need the VIs to run concurrently. For eg. consider ABC.vi

I use ABC.vi in one stack and I have ABC.vi in another stack so when I execute the block diagram both stacks will run. But I only get one of the ABC.vi running at any one time. The other ABC.vi will have to wait until the first one completes. Thanks

Re: Running the same VI concurrently

altenbach — Mon, 14 Jun 2004 01:36:59 GMT

Set the VI as "reentrant". (In File...VI properties...execution).

Re: Running the same VI concurrently

Roy_F — Mon, 14 Jun 2004 16:59:16 GMT

You should probably do a little reading to learn about reentrant VIs so you know when and when not to use them. There is an application note (Using LabVIEW to Create Multithreaded Applications for Maximum Performance and Reliability) which discusses marking VIs as reentrant (section labelled Simultaneously Calling SubVIs from Multiple Places). You can get a link to this app. note by opening LabVIEW's help, selecting the Index Tab and entering "reentrant" (or just select the link above 🙂 ).