I managed to achieve what I needed in the end using a daqmx channel property node to define the source of the counters, which then seems to make the initial counter selection redundant (even so, I still have to choose a counter for each channel which I don’t understand!)
I needed to use the start trigger for another external signal to synchronize the two counters, but it pointed me in the right direction – many thanks Gus!!
What I can’t do now is get my counters to reset their count after each sample so that I can compare duration. i.e. 30, 30, 30. All I can get is 30, 60, 90. I have attached a snippet of my code.
Can anyone help!!!!
Thanks in advance.