Halting the System if TCP/IP Fails

Halting the System if TCP/IP Fails

Use the Halt on IP Failure checkbox to determine how the LabVIEW Real-Time Module and the controller behave when there is a TCP/IP failure while the controller is booting.

If the checkbox is not checked, LabVIEW Real-Time starts and runs start-up applications you created, even if it cannot automatically obtain an IP address, or if TCP/IP fails for any other reasons when you start the system. When the connection becomes available, you must manually restart the controller in order to connect it to the network.

If TCP/IP fails and the checkbox is checked, LabVIEW Real-Time attempts to obtain an automatic IP address using DHCP. If the attempt to obtain an IP address fails, LabVIEW Real-Time attempts to obtain a link-local address (169.254.x.x), if your target supports this feature. If the attempt to obtain a link-local address also fails or is not supported, LabVIEW Real-Time will reboot the target to try again. After three failed attempts, LabVIEW Real-Time resets the controller to IP address 0.0.0.0.

Note  DHCP failure is considered a TCP/IP failure.