enter a value

[sho]

How can I enter a value when VI is in execution and it'll wait me to finish modified this value. I think to a loop but it'll take to much ressources.

[Al_S]

You can use a loop and an OK button or an Event Structure. I always use a Wait (mS) function in a loop waiting for operator input to give a 100 or 200 mS wait. The Wait pauses a tight loop and allows LabView and/or Windows to do other things while you're waiting. If you want to look at using events, enter Event Structures in LabView's help index.