9401, 2 encodeurs and sampling recording

[jeffou]

Hello 

I have a NI9401 on a C-DAQ9171. 2 optical encoders are connected to the 9401.

My problem is that I want to make an internal timer, in order to be able to record the data with a sampling rate that I can easily change.

Thus, I should configure 2 counters for the input corresponding to the 2 encoders, and another counter to make the "internal" clock,  which will allow me to have a valid sampling requency (1000 hz) for example.

I have watched many topics about that, but I still don't manage to do that. (I am new to labview..)

If anybody could help I would be very gratefull.

Sincerely.

Jeff 

[John_P1]

To configure the counter output task you would refer to the counter as:

<chassis_name>/_ctrN

e.g.

cDAQ1/_ctr0

To reference the internal output for the sample clock you would refer to the terminal as:

/<chassis_name>/CtrNInternalOutput

e.g.

/cDAQ1/Ctr0InternalOutput

Neither of these options will appear in the drop down list for DAQmx channels/terminals due to default filtering options.

Best Regards,