Real-Time Controller Unexpectedly Reboots Into Safe Mode

Updated Sep 19, 2019

Reported In


  • CompactRIO Controller
  • CompactRIO Chassis


  • LabVIEW FPGA Module
  • LabVIEW Real-Time Module

Issue Details

  • I have a Real-Time controller deployed in the field that is now occasionally switching to Safe Mode. After several reboots the system will restart in normal mode. Any idea as to why this system is now acting this way?
  • I can't get my Real-Time controller out of Safe Mode, even after rebooting. What do I need to do?


There are many circumstances that could cause a Real-Time controller to boot into safe mode. The following steps may help to narrow down the cause of your controller rebooting into safe mode:
  • If the controller has DIP switches, make sure the safe mode switch is set to 'off'
  • Reformat the controller and reinstall the software
  • Try different modules, as one of them may cause unexpected behavior 
  • Try a different controller
  • Monitor/check the power supply 
    • Provide a dedicated power supply to the controller
  • Ensure that you have an internet connection.
  • Try to ping your RT controller from command prompt.