10-30-2013 01:11 PM
The specification for the NI 2531 states that the simultaneous drive limit is 40 relays for the PXI version and 64 relays for the PXI Express version. However, when I try closing more than 40 relays with a PXI Express card I get the error:
"
Error -200671 occurred at DAQmx Switch Connect (Single).vi:1
Possible reason(s):
Switch device has been disabled to prevent it from exceeding its simultaneous relay drive limit.
To recover, call DAQmx Disconnect All, or reset the device. The device can be reset either programmatically or by using Measurement & Automation Explorer.
..."
WHY!?
10-30-2013 01:56 PM
Hey Chris,
I've verified the incorrect behavior you're seeing and have filed CAR 433928 for your future reference. Apologies, but it appears we incorrectly copied this parameter from the PXI-2531 variant, which is otherwise identical. If this is a showstopper for your project, please send me a private message and I'll get you in touch with the right people.
10-30-2013 04:22 PM
Actually, I'm fairly certain this was fixed in DAQmx 9.6.1 / NI-Switch 4.6.1.
- Marshall G.
National Instruments
10-30-2013 04:46 PM
Thanks, Marshall! That's what I get for not updating the software on my dev machine.
10-31-2013 12:45 PM
It is working as expected using the most recent version.
Thank you.