How do I get NIDAQ to allow >8 differential channels on a PXI 6031E card?

[BrianZ]

The PXI 6031E card contains 32 differential analog inputs (64 SE). However, in MAX, it is not possible to select Differential mode for any channels past the first 8. If you run the Test panels for the 6031E card (configured for differential input), selecting channels 8-31 results in an error. (0-7 operate correctly).

[Sarah Thompson]

Brian,
I found a KnowledgeBase that may help you out. You need to make sure you are addressing the channels properly.

Why Can't I Read More Than 8 Differential Channels on My 64-Channel DAQ Board?: http://digital.ni.com/public.nsf/websearch/F672F0B9D9CE739286256723007EB18C?OpenDocument.

Have a great day!

[BrianZ]

Yep! The URL has the answer. My problem statement wasn't quite accurate in that I claimed that I had errors on channels 8-31...Actually 8-15 and 24-31 were invalid and caused errors. What is/was confusing is that when editing an analog channel in MAX, and differential mode is selected, MAX allows the user to select invalid channel numbers(e.g. 8-15). The MAX editor requires the user to somehow "know" (or access the above URL) to skip 8 points to get to the next group of valid differential analog channels (16-23). It would be better if the channel number selector only displayed valid selections - based on the selected mode.