No supported devices found in DAQ assistant using compact rio in lv2009

[mercury316]

I am attempting to conduct real time voltage monitoring from NI-9201 module.  This is connected to the NI-9104 rack through compact rio 9104 inot labview.  The MAX has all the correct software installed and the 9201 module is depicted in slot 1 in project explorer.  When I run the DAQ assistant, under the supported physical channels the message is 'No supported devices found'.  I have attempted to resolve this problem by altering the file location in the file management tree to no avail.  I can communicate with the real time module and the FPGA in MAX explorer but not within a project, the DAQ assistant should be able to see the NI9201 device.

Have I missed something simple!

[david.bolt]

Hi there

The reason you are incurring this error is that the DAQ Assistant Express VI is not the best solution for using in Real-Time.The best advice however would be to not use the DAQ Assistant with LabVIEW Real-Time. Instead, use the explicit NI-DAQmx VIs located on the Measurement I/O » NI-DAQmx palette. These VIs have much less overhead than the DAQ Assistant.

I have referenced some links below to get you started via our Developer Zone.

Getting Started with NI-DAQmx

Building a Digital Input VI in NI-DAQmx

DAQmx examples can also be found in LabVIEW » Help » Find Examples... » Browse by Task » Hardware Input and Output » DAQmx

These low level VI's are suited for use when programming in LV Real-Time. You will also need to install DAQmx drivers if you haven't already done so.

[GerardoG]

Actually, the reason you're getting this error is because CompactRIO does not support the DAQ Assistant. I think the previous poster mistakenly thought you were using a CompactDAQ chassis as opposed to CompactRIO. Both of these systems support using the NI-9201 input module, but the programming is different. For an introduction to programming cRIO see these tutorials:

Logging Data to Disk

Monitoring I/O Remotely

For a more extensive guide, see:

CompactRIO Developer's Guide

Regards,

Gerardo

[mercury316]

Thanks guys for your help, I will read the information on the link.  Hopefully it should solve my issue