When writing to an AO channel with the Traditional driver, I was able to go from writing multiple samples, to writing one sample, by first clearing the AO (AO Clear.vi), then passing the Task ID to AO Single Update.vi along with a value, as long as that value is passed through the "build array" tool.
It seems to me however, that i cannot accomplish this with DAQmx. With DAQmx, i have no problems, so long as i am writing MORE samples than i had previously written (i.e. i write a 0, then i write 0-0, then i write 0-0-0-1-1-1). However, if i try to write LESS samples, i get an error (i.e. 0-0-0-1, then just a 0....ERROR). The only way around this (that I've found) is to Clear the task completely, and then re-create it. Am i missing something, or is this really the only way of accomplishing going from writing an array of data to an AO to writing a single value to that same AO channel?
Thanks in advance.
David
