access a "hardware channel" or create a virtual channel

[Cyril]

Hi,

I'm using Labview 7 and "traditionnal DAQ 7".

Here is my problem, I would like to be able, in my app, to configure a
virtual channel. Actually, I think I have to create a virtual channel
(as in Max).

If it's not possible, could you tell me a way to access the "hardware
channels" of my daq cards (I use a PCI 4472 and 4474)... I can't find
a way to do that (but I'm a newbie 😉 ).

I could not find the "DAQ assistant" in my available functions (I
don't know why...)

Thank you very much for your help.

[SarahM]

Hey Cyril,

The DAQ Assistant uses our new driver DAQmx. You can find the DAQ Assistant on your function palette by going to All Functions >> NI Measurements >> DAQmx � Data Acquisition. The DAQ Assistant is in the lower left corner.

Both the PCI 4472 and the 4474 are supported in both Traditional NI-DAQ and NI-DAQmx in NI-DAQ 7.2. Check the NI-DAQ Readme (Start >> All Programs >> National Instruments >> NI-DAQ >> NI-DAQ Readme) for support information for your version of DAQ. You can always download the latest version for free from our website.

With DAQmx you can create global channels or tasks within LabVIEW. However with Traditional NI-DAQ you cannot create virtual channels within LabVIEW. With Traditional NI-DAQ you can access virtual channels create
d in MAX or access the physical channels directly. I would suggest looking at an example program to see how to access the channels directly. I would suggest looking at any of the analog input examples which can be found by going to Help>>Find Examples>> Hardware Input and Output>> Traditional DAQ >> Analog Input >> General.

If you have more questions about programming your hardware I would suggest posting to the Dynamic Signal Acquisition and Analysis forum.

Dynamic Signal Acquisition and Analysis

I hope this helps!

Sarah Miracle
National Instruments

[Cyril]

Thank you very much for your answer.

Regards,

Cyril