Need Your Help,Thanks!I put a wait(ms) function in a while loop, and the value is set to 10 ms. I put tick counts(ms) before and after the wait function to calculate the delay time.I found that sometimes the delay time is larger than 10 ms, sometimes can be about 150 ms. how could that be possible!The snapshot of the VI is attached, thanks!.

Hi ritayuan, I am thinking if that is related to the windows system. Yes, Windows is a non-deterministic (aka "Realtime") operating system. When the windows system is busy or in other situations, all the processes are blocked?? Yes, this might happen. - When you need real (or: more) deterministic behaviour you need to use a realtime OS as is used with the RIO devices from NI. - When you just want to read data from a DAQ device it might help to use the hardware timing of this DAQ device instead of relying on software timing! Edit: DID YOU READ MY COMMENT ON CONVERTING IMAGES TO REAL PNG/JPG? BMPs are banned because of their filesize as can be seen from my converted PNG and JPG version of your image!

LabVIEW

LabVIEW wait function in a while loop delay time not accurate

Solved!

Hi Rita,

even that old crappy WindowsPaint tool coming with Windows is able to convert between BMP, PNG and JPG! Also free tools like IrfanView are able to convert images…

Best regards,
GerdW