Under - Used twice within a VI VI

As I am still learning new things in Labview, I have a question.

Can there be a condition to receive if I use the same Subvi twice during the same VI? See attachment.

By default, a VI can have 1 instance at a time.  This means that if a VI is running and an another VI call it, the new calling VI must wait until the end of the Subvi in order to run.  This is necessary if you are maintaining status information (motor Action or functional Global Variables).  If you not manage state, it can probably be sure to put the VI to be reentrant, meaning that there may be multiple instances of the VI in memory, each instance will have its own memory block.  This example uses more memory.  For the most part, subVIs will run fast enough that you don't need to worry about the reentrancy because waiting to run will be very short.

By quickly looking at your code, I wouldn't worry the reentrancy since your Subvi is going to run fast.

Tags: NI Software

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