Modified DAQmxBase Start Task ESeries

[FReich]

Hello everybody,
Is there a possiblilty to show the current sampling rate on the screen of the PDA, and can I use this value to integrate it into my calculations. At the moment I just know how to set the sampling rate for measurments with the PDA during I program the application.
Every help appreciated

[Ken_Tobler]

Hello!

Are you programming with LabVIEW?
Which driver are you using? DAQmx Base?

How do you set your sample rate im program? With a control? It is not possible to wire directly your samplling rate control to your calculation?

Regards

Ken

[FReich]

Thank you for your reply

I am programming with LabView PDA-Modul

As Driver for my NI CF-6004 I am using the DAQmx Base 2.0.

By using the NI-DAQmx Base Task Configuration Utility I creat DAQmx Base Tasks.

This Tasks are setting the sampling rate.

In the PDA Modul there are only the DAQmx Read, Write, Start, Stop and the Task Config/Ctrl VIs available.

Do you mean with control another DAQmx data acquisition VI?

Regards

FReich

[arvin_labrat]

Hey

I'm not sure about Daqmx Base 2.0 but with 1.0 I had to modify the Read VI to pull the sample rate out.  It's in there somewhere.  If you like I could dig into my VI's and find it.  Hopefully somebody has a better solution.

Eric

[FReich]

Hey Eric,

thank you for your reply. It could be of great help, if you find this modified Read VI and post it here.

Cos at the moment I dont have any clue how to deal with that problem.

[arvin_labrat]

I was wrong about the Daqmx read it was actually DAQmxBase Start Task ESeries that was modified.

Hope this helps

Eric

[FReich]

Thank you,
I think thats the way to the solution. I will try to go this way.

The problem is just that the read VI in my LabView version is quite different. Have a look at the picture.
It uses libraries to save the sampling rate etc.
I think maybe there is a possiblity to access the library with another VI, or maybe I just use your VI if its possible.

At the LapView 8.0 PDA Modul the Sampling rate is set by the DAQmx Base Configuration Utility which put this info into a library file,
it seems that in older version it has been done in the VI itself which means there has been no DAQmx Base Configuration Utility.
Am I right about that?



 

[arvin_labrat]

What does your start Daqmx Task look like.  You should be able to find the rate info in there.

PDA Modual 7 does use the Task Configuration Utility.

Eric