Error 10843, PCI-6110

[Mkova00]

Hello,

We are using a new S-series PCI-6110 card and are trying to output a high frequency square wave. However, for update rates greater than 2 MHz, error 10843 (underflow) is generated.

I've tried several of the posted suggestions from Knowledge Base and the discussion forums. I think the problem is probably not our processory (3 GHz CPU). I've increased the size of the application buffer, but that did not help. I closed all the programs that were running in the background. I used the Set DAQ Device Information.vi to force the AO channel to use DMA. None of these changes has gotten rid of the error.

The only other suggestion I've found is to use outputting looping from the on-board memory, but I am not sure how to do this, or whether it is possible with this PCI card for analog output.

Also, Error 10843 is also followed by Error 10687. I'm not sure what is triggering Error 10687, since it seems to typically be associated with running multiple VIs at once.

I've attached a picture showing my code. The program runs well for update rates less than 2 MHz.

Any help is much appreciated,

Thanks,
Michelle

[Elizabeth W]

Hi Michelle,

If I may ask, do you have a particular reason for using Traditional DAQ to create your application rather than the newer, easier-to-use NI-DAQmx driver?  I would strongly suggest that you use the newer DAQmx API if at all possible.  If you aren't sure why you would want to switch, check out Advantages of NI-DAQmx.

With that being said, if you do have a specific limitation that prevents you from updating your drivers, you may find this helpful: KnowledegeBase 385AIBQ8: Analog Output Regeneration Modes.  This should give you some more information about how to use analog output regeneration, which allows you to download a repetitve waveform to the device's buffer for continous output.

Once you have taken a look through this information, please let me know if you have any more questions.