Xcontrol Freez display

[Nitrof]

I'm using Xcontrol in my application.  They are updated at a rate of 20 ms from data coming from an other system.  In this application many controls are dynamically registered to send value to the other system.  If I leave the control unchanged, no value change generated, there is no problem.  But when I change these control value, aggressively, the display freeze.  The owl LabVIEW environment is feezed, there is nothing I can do anymore.  Then surprisingly if I click any where else, such as in the task manager, an explorer window or in the wallpaper the LabVIEW interface come back to life.

Any ideas?

Nitrof

[PhillipBrooks]

20 ms (or 50 Hz) is probably a bit fast for updating anythiny other than the simplest XControls (string or numeric). Charts will be CPU intensive. I'm now only working on LV 7.x (8.x not available) so I can't give you an example or look at your code

Try collecting small groups of the data in an array, deferring panel updates, write the array values to the XControl / turn off defer panel updates. try to keep your front panel updates to 10 -20 Hz (100 -50 ms intervals). You won't be able to perceive much over 30 Hz.


Message Edited by Phillip Brooks on 07-09-2008 01:56 PM