Difference between cDAQ-9174 and cDAQ-9178

[Paul_Knight_Lockheed_Mart]

I have multiple cRIO-9081.  Each cRIO-9081 is running NI-DAQmx 15.5.  On four of the cRIO-9018 we have attached cDAQ-9178s with 8 modules.  Everything just worked.  On the fifth cRIO-9018 we attempted to connect a cDAQ-9174.  The device showed up in MAX and Windows Device Manager, but MAX reported that the device was not present (Error -88705) and that Windows did not find a driver for the instrument.

We then plugged in a cDAQ-9178 into the fifth cRIO and everything just worked.

What is the difference between a cDAQ-9174 and a cDAQ-9178 other than the number of module supported?

Paul

[sunaenae]

Hi Paul,

In terms of specifications, the two cDAQ chassis should have almost exactly the same specs (at least in all the ways that would affect that connection) -- the only main difference is the number of modules, as you mentioned. More detail on the specs can be found here:

https://www.ni.com/docs/en-US/bundle/cdaq-9174-specs/page/specs.html

https://www.ni.com/en-us/shop/model/cdaq-9178.html

It looks like something may be wrong with your 9174 -- is it working when connected to another system? These are also some great troubleshooting steps to start with: https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000P7OaSAK&l=en-US

[Paul_Knight_Lockheed_Mart]

Sunayna,

Yes the 9174 works with other computers.

Paul

[sunaenae · Accepted solution]

Hi Paul,

This seems like it may be a driver issue! What version of DAQmx do you have installed on both computers? A reinstall of the newest version might be worth a shot since it looks like there may be some corruption. You can find the newest version here: https://www.ni.com/en/support/downloads/drivers/download.ni-daq-mx.html#288248

You can also manually associate the driver with the device, here: https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019NFGSA2&l=en-US

Are there any modules plugged into the cDAQ chassis?

Also, sometimes this can happen if you do not reboot your computer after installing NI-DAQmx. Rebooting your computer after installing the driver will allow you to reserve the device successfully. Here are a few other steps to try:

• Check the NI Device Loader to see if it is running
• Reset the NI Device Loader service
• Reset MAX Configuration Database
• Power cycle the system

[Paul_Knight_Lockheed_Mart]

Sunayna,

Reloading NI-DAQmx 15.5 and resetting MAX configuration database fixed the issue.

Paul