Concept of channel, port and line in labview programming

Question

I am starting to learn the labview programming from the code written by someone else long time ago. Here I saw IO channel, line and port, I guess their meaning by reading code but I am looking someone to clarify that for me. To my understanding, IO channel is refer to analogy input/output port, port refer to 8-bit, 16-bit or 32-bit digital input/output pins, each bit (pin) is called a line. Is that correct?

This is very dependent to the hardware it's connected to. – CharlesB Jun 03 '13 at 08:30 — CharlesB, Jun 03 '13 at 08:30
Your assessment is generally true for NI hardware. – CookieOfFortune Jun 05 '13 at 22:18 — CookieOfFortune, Jun 05 '13 at 22:18

score 0 · Answer 1 · answered Jul 11 '13 at 11:41

Assuming you're using NI-DAQmx, which is the up-to-date software interface for programming NI's data acquisition hardware, the explanation of this terminology can be found here. The complete help for DAQmx is here.

If you're looking at very old code which was written for very old hardware it's possible it might be what NI now call 'Traditional DAQ' rather than DAQmx, but I think the terminology is the same. I think Traditional DAQ VI's will have names starting with 'DAQ' or 'NI-DAQ' rather than 'DAQmx'.

Concept of channel, port and line in labview programming

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