Disconnected/Bus-off state

Modified on Fri, 16 Feb at 9:27 AM


Applicable Errors: 



Error Description: 

Network Cable is disconnected or bus is off (network not connected)


Possible Remedy:  

  • Check condition of serial bus cable and verify the cable is connected on all networked devices.  
  • Verify Power supply for network is operating correctly (on applicable serial network cards) 
  • Confirm configuration of IO expansion card (on applicable serial network cards) using the RC7M options manual (link to manuals below)
  • Confirm IO parameter settings and FieldBus parameter settings in controller match the settings the machine was originally built with. The settings can be confirmed by checking an older Wincaps III backup project. 
  • Cycle power on the primary device and RC7 controller.  

Tools and Parts Needed

Full sized teaching pendant 

Computer with Wincaps III

Next Steps:

  • For repair options in the Americas please contact support@densorobotics.com 
  • For repair options outside of the Americas, please contact your local Denso Service Center. 

Owner's Manual Reference

Download RC7 Manual Pack to aid and determine the correct controller configuration. CADs and Manuals - DENSO Robotics 

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