Some terminals are given multiple names b/c they can serve different kinds of purposes depending on your task config.
For the pin CTR 4 OUT/PFI 20/P0.20
- CTR 4 OUT - means that this is the default output terminal if you configure CTR 4 for output pulses. But you *can* configure that task to direct its output to a different terminal.
- PFI 20 - this is how you'd refer to the terminal when you use it for some kind of timing signal, such as a trigger, a sample clock, or a timebase clock (from which a sample clock can be derived).
- P0.20 - this is how you'd refer to the terminal when you use it for a Digital input or output task. Read it as Port 0 Line 20.
Note: 2 different tasks could use the same terminal for different purposes at the same time, provided no more than 1 of them outputs to the terminal. One common technique I've used that for is to designate a PFI terminal as the trigger for a counter task and then define a DO task that will generate a brief pulse on Px.x to pulse it at a time of my choosing.
- Kevin P
ALERT! LabVIEW's subscription-only policy came to an end (finally!). Unfortunately, pricing favors the captured and committed over new adopters -- so tread carefully.
