Can I multiplex SCXI data and PXI-DAQ direct inputs?

[nimic]

Hello

In a PXI1052 PXI-SCXI-combo chassis (PXI 6602/6052E/SCXI1112/1125, LabVIEW 7), I know how to read the different SCXI-Modules in multiplexed mode through the controller DAQboard

e.g. SCXI module 1 data - SCXI module 2 data - SCXI module 3 data - SCXI module 1 data - ....

However, I want to use the DAQ-cards direct inputs as well. e.g.

PXI MIO inputs - SCXI module 1 data - SCXI module 2 data - SCXI module 3 data - PXI MIO inputs - SCXI module 1 data - ....

I could not find a solution in either documentation or discussions. So this task may be a) impossible, or b) trivial. The obvious solution to use 2 different PXI-MIOs is only a last resort.

Thanx for your assistance.

Michael

[Brad_K · Accepted solution]

Hi Michael,

You can add AI channels from the SCXI modules and the MIO to the same DAQmx task. If you're using the DAQ Assistant, hold down ctrl or shift when selecting the channels in order to select channels from multiple devices, or click the "+" button to add more channels to an existing DAQ Assistant task. If you're using the DAQmx API directly, pass "PXI1Slot4/ai0:15,SC1Mod1/ai0:7,SC1Mod2/ai0:7" (or something similar) to the physical channels parameter of DAQmx Create Channel. You can also call DAQmx Create Channel multiple times with the same task handle, which is useful when different channels need different measurement types or channel settings.

Brad