Numerical Indicator Update Rate

[KevC]

Hello all.

I am reading and charting several voltages. I am also using a numerical display of the same data.

I would like the charts to be updated continuously, but the numerical displays only updated say every 250ms.

I cannot find an option for this, I have checked the forum and help pages and could not find anything similar.

Thanks

[GerdW]

Hello KevC,

just put the indicator into a (while) loop containing a "wait for next multiple" with your desired update time. Then connect the indicator with your data source. (Easiest solution could be a local variable to allow proper data flow...).

[KevC]

Hi GerdW

Thanks for the reply.

Will this have the effect of updating everything in the while loop at such a rate, including the charts?

I have 5 numerical displays and 3 charts in total.

Thanks again

[GerdW]

Hello KevC,

roughly said: an indicator gets updated when new data is written into. So everything in a loop that gets new data is updated on the frontpanel.

But you asked "how to update a single indicator at a given interval?". So put just the needed indicators into the loop and leave the rest untouched.

[KevC]

Thats fine now, just checking.

Many thanks.

[KevC]

Hello again.

Sorry to ask you to go over this again.

My VI consists of 1 while loop, where the tasks are configured outside, and everything that must be updated contiually is inside.

How do I use another while loop with the wait function to update the numerical indicator?

Best Wishes

Kevin

[Sarah_Coleman_NIUK]

Hi there,

A quick way to do it would be with local variables. Here's a little example that simulates a signal, graphs it continuously and outputs a numeric value every 500ms. I'd recommend putting some form of timing in the main loop to stop it eating all your CPU though!

[KevC]

Hello Sarah.

Thanks for the reply.

I had problems opening the attached file. I am using Labview v7.1.

[Sarah_Coleman_NIUK]

Sorry, it was in v8, here it is in v7.1.

[KevC]

Oh, i see.

Many thanks Sarah, Greatly appreciated.

Best Regards

Kevin