I'am I new user of the DAqmx, I use a Ni 9401 ( 8 DIO, 5 V/TTL, Bidirectional, 100 ns) to have angular speed spped with a NiCdaq 9174.
I start doing a Labview VI but I have some errors, the first one is as shown in the picture.
If somone used with the NI 9401 can help.
Thanks a lot,
You've selected an incorrect channel for the DO operation - you should be selecting DO channel of 9401, instead you have selected a AI channel of some other module
Thank for you answer. the problem that when I want to choose my physical channel , I Have olnly ( cdaqmod1 and cdaqmod2 : I have other card) Not the cdaqmod3 ( NI9401 position):
Looks like you reused a DAQmx AI example and the control is filtering only AI channels.
Try deleting the control and creating a new one from the Create DAQmx Task API.