Data transfering from sub-vi to main-vi

[Oliver Meike]

Hi everybody,
I have a simple example, where I would like to transfer the data immediately from the sub-vi to the main vi, during the system is running (and not after the sub-vi has finished its execution). In this example, I would like to transfer only the loop index i of the for-loop. In my application there is a lot of more stuff in the two VIs, so I need this sub-vi and cannot put the stuff out of the sub vi into the main vi. I tried the data transfer with a global variable, but then I get only the last number of the loop into the main vi. Or I did something wrong. Has anybody an (easy) idea, how to solve this problem? BTW: I am using LV 6.0.
Thanx for your help,
Oliver.

[Alberto]

Hi Oliver,
in your example the numeric data is passed from sub-vi to main only when sub-vi terminates, this is what it's supposed to be when you fetch the data from the connector output of a sub-vi.
You can use queues function to exchange data between sub-vi and main.vi; take a look at the example Message Logging with Named Queue.vi.
An alternative method is passing to sub-vi a reference of an indicator (or control) and update its value on the fly.
See example.
Alberto

[Oliver Meike]

Thank you very much, Alberto. Now it is working.
Thanx, Oliver.

[Croby1980]

Good example

[JÞB]

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@Croby1980 wrote:

Good example

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Not bad for your first post!  A reply to a 13.5 year old thread?  No kudos! 

NICE bump!

*.llb's are no longer relevant as good examples.  

[Bob_Schor]

Wow!  Are you really using LabVIEW 6 (which is what the two attachment report, and which may explain why my browser crashed when I tried to click-download them)?

Bob Schor