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Difference between cDAQ-9174 and cDAQ-9178

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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

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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:

 

http://www.ni.com/datasheet/pdf/en/ds-178

http://www.ni.com/pdf/manuals/374045a.pdf

http://sine.ni.com/nips/cds/view/p/lang/en/nid/207534


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: http://digital.ni.com/public.nsf/allkb/34CC88F4838CD37E86256A290066A2BE

Sunayna R.
Applications Engineering
National Instruments
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Sunayna,

 

Yes the 9174 works with other computers.

 

Paul

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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: http://www.ni.com/download/ni-daqmx-15.5/5901/en/

 

You can also manually associate the driver with the device, here: http://digital.ni.com/public.nsf/allkb/5B80CAAA64413B4C86256C5E0000C1A7

 

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
Sunayna R.
Applications Engineering
National Instruments
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Sunayna,

 

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

 

Paul

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