06-13-2016 08:25 AM
Here are keypoints of my setup:
Sometimes this functionnality is perurbed by unexplained latency. Here is statistics of loop_A delay (delay is added into listbox if delay is superior to 1 sec).
Other observation: once such lattency happens, the LED "Active" on USB-6343 is almost OFF.
Thanks in advance.
06-13-2016 08:56 AM
Probably cause of such malfunction could by desynchronization of loop_A and loop_B that run in separated VIs.
Anyway how to explain such huge latency ... more than 5 sec, i.e. more than 50 times of the loop delay (100 ms)
06-13-2016 10:30 AM
Resolved. The problem was low-power USB that powered digital camera.
Once camera put on external Power, the problem disappeared.
One more question before closing this topic: is there some function in LabVIEW for determining whether USB port is powerful or not.