Why Doesn't the Device Appear in MAX?

If you cannot find the NI-7931R in MAX, complete the following steps.

  • Ensure you have the correct version of FlexRIO Support installed on the host computer.

  • Check the USB cable connections at the NI-7931R and host computer. Check the Ethernet cable connections at the host computer and router.

  • If you have network firewalls or other security software enabled, try temporarily turning them off. You may also need to add an exception for MAX. In Windows 7, select Start » Control Panel » System and Security » Windows Firewall » Allow a program through Windows Firewall. Click Allow another program, select Measurement & Automation, click Add, then click OK.

  • Ensure that UDP port 44525 is open to communication on the host computer. If you are using an intelligent switch on the network, ensure that it is not disabling UDP port 44525.
  • Hold down the RESET button for 5 seconds to reboot the target into safe mode. This prevents a real-time app from running. Sometimes a malfunctioning real-time app prevents network communication.
  • Check the Device Manager to ensure the National Instruments USBLAN adapter is recognized. In Windows 7, select Start » Control Panel » Device Manager » Network adapters » National Instruments » USBLAN adapter. If the USBLAN adapter is not recognized, you must reinstall FlexRIO Support.
  • Ensure that the Ethernet cable is connected correctly.