DAQ Device or Module Does Not Appear in LabVIEW And/Or MAX

Updated May 8, 2019

Reported In

Hardware

  • CompactDAQ Chassis

Software

  • Measurement & Automation Explorer (MAX)
  • LabVIEW

Driver

  • NI-DAQmx

Issue Details

I am unable to interface with and configure my DAQ device or module using LabVIEW and/or Measurement & Automation Explorer (MAX).  
  • I can't see my DAQ chassis or module in MAX.  It is not detected, not recognized, or is missing.
  • I'm trying to use my DAQ device in a LabVIEW or VeriStand application (such as DAQ Assistant or FlexLogger), but it doesn't appear under available devices. However, I can see the device in NI MAX. See troubleshooting scenario Device Does Not Appear in LabVIEW but Appears in NI MAX.

Solution

For All Devices and Modules

  1. Confirm your device is powered on and connected to your computer.
  2. Swap power supplies, try different slots, power cycle the device, and reset the system.
  3. Verify or update your driver. Note that some devices and modules are no longer supported in NI-DAQmx 17.6 and later. Confirm that you have DAQmx installed and determine the version of NI-DAQmx already installed on your system. Check to see if the correct drivers are installed for your DAQ hardware by checking the readme for that version of NI-DAQmx. You can find some NI-DAQmx readme’s in NI Manuals, and the rest can be accessed through NI Downloads for NI-DAQmx .
  4. If you have recently installed new NI software, drivers, or hardware, restart your operating system (OS).
    • If you recently installed to a newer version of LabVIEW, try repairing the DAQmx driver . You will then to need restart your system.
  5. With NI MAX open, start by refreshing the list of connected devices by clicking View»Refresh.
  6. Check to see whether your DAQ device appears in Windows Device Manager. If it does not, make sure that the device is plugged in correctly, and check for any loose connections. Also make sure that the PCI bus on your computer has the same Voltage rating as the DAQ card you are using. If you are using an NI USB DAQ device, also review the section below.
  7. If your device or module does appear in Windows Device Manager, check under what category it appears.
    • If your device appears under Data Acquisition Devices, verify the NI Device Loader service is started.
    • If your device appears under a different category, complete one or both of the following procedures:
      1. Right-click on the device and uninstall it in Device Manager. Then, restart the computer and let the device's software install automatically.
      2. Manually associate the device with the appropriate driver.
  8. Check that the NI Device Loader service is running.
  9. This problem might also be related only to MAX software if you are getting a database connection error. You may need to reset your MAX Database.
  10. If you are using a MXI or MXIe connection, review the MXI Compatibility and Connectivity Troubleshooting Guide.


For USB DAQ Devices


Device Does Not Appear in LabVIEW but Appears in NI MAX

NI MAX may be reserving the cDAQ device or modules. This means that you can't access them in any other software applications.
 

  1. In NI MAX, under Devices and Interfaces, select your device.
  2. Unreserve the resource to allow the device to be accessed by other LabVIEW applications.
For more information on resource reservation, read Additional Information in article Resolving NI-DAQmx Error -50103 in LabVIEW.

    Additional Information

    Additional Troubleshooting Steps

    • Connect your DAQ device to another computer. Make sure this computer has the correct drivers installed.
    • If you have another DAQ device that is connecting correctly, then try using it on this same computer to see if the issue persists with the computer or with the device.
    • Lastly, if the steps provided do not fix the issue you can try repairing your DAQ Device Driverperforming a force reinstall, or installing a compatible, more recent version of the driver.
    • Make sure you have the Devices and Interfaces section expanded, along with all of your chassis expanded to have all modules showing.

    Ensure that you have the correct DAQmx driver software. You can check this in NI MAX under the software tab. You should see the following three under the software drop-down in NI-MAX:


    *Note: Your driver may not be version 18.1.
    If you do not have all three of these, please reinstall DAQmx .

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