"Once you start the task, it will trigger the voltage out everytime that trigger condition has been met."
Thank you for your advice!
But when I create a task in this way, DAQ generates waveform only for the first trigger condition and ignores the rest ones. May be I do something wrong?
I am afraid there is not a way to do this without the use of counters. The
counter is the only hardware that has the ability to be retriggered. The analog
output circuitry or any other circuitry for that matter does not have that
ability built in, only the counters. So in order to achieve retriggered operations
you must use the counter, and hence this method.