Timed digital acquisition is not working with a 6233 Isolated Card

[icebear]

I have a system in which I was using a PCI-6251 to do a timed digital data acquisition using the AI sample clock and using this task to time a digital (finite)acquisition.  To isolate my signals I had to change cards to a PCI-6233 and am trying to use the same code.  I get an error message indicating the sample clock is not a valid option.  I have also tried to run the counting_dig_events_dio.vi example and recieve the same message (Error -200077 Sample Clock not Supported, On Demand is available) although the documentation indicates it is complatible with the 6233 card.  Does the 6233 not support the use of the on-board sample clock and how can I perform a timed acquision?  I also have a 6527
available, but this would require I add a RTSI card and modifications to configuration controlled software.

Thanks in advance for help.  -Stefan

[Hani R]

Hi Stefan,

The PCI-6233 does support the use of the on-board sample clock.  You may already know this, but you can view the timing and triggering possiblities in Measurement and Automation Explorer by click the Device Routes tab for your device.

To which line are you routing the AI sample clock?  Also, could you post your code or some screen shots of your code (specifically where you are routing the Sample Clock) ?

[icebear]

Thank you Hani,

Looking at the device routes tab was new to me and is a valuable insight.  I was mistaken in that I actually have the 6232 card.  I have attached the code for the digital signal task initilization, as I had also mentioned, I am unable to use the example code counting_dig_events_dio.vi.  I have also attached the error code from the example (this is identical to the error I get when running the actual code), note that I have moved between dev1 and dev2 as an identifier for the board.  The other board in the system is a 6527 which has no onboard clock.

Thank you in advance for any help you can give.  -Stefan

[Mark_E]

Hi Stefan,

I want to apologize for the misinformation on our website. This example does work with the PCI-6251, but not the PCI-6232/6233. The reason is that these cards are only capable of software timing. Correlated digital IO is another way of saying hardware timing. The capabilities of these different cards can be seen from their product pages under the Specifications tab, then under Digital I/O – Timing. Again the PCI-6251 shows “hardware” here, while the PCI-6232 /6233  show “software”.

I’m sorry for the confusion you’ve experienced. I will take the necessary steps to have the page for the counting_dig_events_dio.vi example program changed so that it doesn’t mislead anyone in the future. We value this type of feedback, and I thank you on behalf of National Instruments.