LabVIEW Timed Loop

[rls9642]

how can I configure a timed loop to execute upon entry, rather than waiting for the first delta time?

If my delta time is 10 seconds, I get my first execution after 10 seconds. I would like to execute the loop when it is initially entered (second 0) then wait every 10 seconds after that.

Thanks.

[Taki1999]

I don't think you want to use a Timed Loop here.

Timed Loops are meant mainly for RealTime systems which need to be deterministic on relatively short timescales.

For a 10 second wait, you should be using a normal loop with a 10 second wait inside of the the loop.

[kbbersch]

What are you seeing that makes you think things are executed after the loop is done instead of immediatley?  Can you let us see your problem code?

[rls9642]

Thanks, but you're missing the point. The 10 second timing is to demonstrate the problem I'm trying to solve.

[rls9642]

Here is a very simple example. You will notice that the initial increment of the iteration counter occurs after a 5 second wait, which is the delta time. I would like this to execute immediately then every 5 seconds thereafter. (Sorry for changing the 10 seconds to 5, but wanted a shorter time)

[kbbersch · Accepted solution]

The first iteration of a loop, any loop, is iteration 0.  That will not change to iteration 1 until the next iteration has started.  This is expected behavior.  Anything inside the loop will execute immediately but the iteration counter won't increment until the next iteration starts.

[crossrulz]

Set your iteration count to -1 before running.  Then you will see that the iteration goes to 0 for the first iteration (yes, i is 0 based) quite quickly.

[jyang72211]

copy the code inside the timed loop and put the copy outside of the loop.  This way, the code will execute once before entering the timed loop. 

[kbbersch]

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@jyang72211 wrote:

copy the code inside the timed loop and put the copy outside of the loop.  This way, the code will execute once before entering the timed loop. 

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Having redundant code accomplishes nothing.  The code will already execute immediately on each iteration of the loop.