connect ao terminal with ai terminal on MIO 16E-4

[KrisJa]

Hi,

I am currently using an PCI board (6731 I beleive) to drive a piezo stage using AO functionality.

This is all fine but there is now way of always knowing, or reading back (as far as I know) what is the current voltage on the AO. This can lead to potentially damaging conditions for my stage if due to some error I try to go from say, 9 V immediately to 0 V if due to some condition I makewrongassumtions about the current voltage.

This is why I was planning to use a MIO 16E-4 I have laying around. This board also offers AI functionality.

I would like to know if it is possible to connect the AO and AI terminals of this board internally (using software, I am working in C#). This way I could route both AI and AO to the same PFI so that I could both measure the voltage and drive the stage.

Is this possible? Is it possible, yet dangerous for some reason? Or is it jut plain impossible?

Any help would be much appreciated!

[KrisJa]

Isn't there anybody who reads these formums?

Of the last 4 questions I posted, not one got answered really...

Very frustrating.

[ChrisR.]

Yes, it is possible.  In addition to the 8/16 external channels, you can read from internal channels which are used primarily for calibration.  Among these available internal channels are both analog outputs.  I don't remember the specific channel strings you need to use, but they're something like _ao0_vs_aognd and _ao1_vs_aognd.

Chris 

[KrisJa]

 Thanks a lot for the info...

I just needed to make sure if this kind of use was intended for the board!