simultaneous execution of while loops

[hema]

I have three loops. In the first loop i am doing AO Single update. In second loop i am readind from AI using AI Single scan. In the third loop I have to take the 2 values (AO update value and AI scan value)and plot in a graph. I used global variables to access the AI and AO values..But the global variables when read in the graph loop does not match with the AI / AO loops. Delay is there. How to solve this or is there any other way

[Oleg]

Hi,
try to use local variables instead.
Or there may be problem with how you make AO and AI or what else you have inside loops.

Good luck.

Oleg Chutko.

[Jeremy Braden]

If you want to get fancy, use a queue. You can find shipping examples by opening LabVIEW >> help >> find examples. Click on the search tab and look for queue.

Oleg is right. A local variable will be better than the global.

[altenbach]

It seems all loops run at the same rate. Why can't you just put everything in a single loop and wire directly? (no globals or locals needed).

How fast are the loop rates?

[hema]

I put everything in one while loop and now there is no problem..
By the way whatz the difference between global and local variables in terms of execution/memory(internal working)?