I am getting data by DAQ Assistant in a While loop. I need the loop working just for 600ms and after that it should stop. I used two Tick Counts inside and outside of the loop (just like attached) so that as soon as x-y indicator gets 600 the while loop should stop. However, this idea does not work as x-y never gets 600. It always starts from around 1025ms (it is randomly, some times this number changes to 1041, 1023, 1058,...). Does any one know what is the problem here? Some thing is wrong with my DAQ Assistant?