ER0~2 LED
Force Sensor Communication Error
Fanuc · R-30iB Mate + Mate Plus Robot
What does ER0~2 LED mean?
The ER0, ER1, or ER2 LEDs illuminate when an error occurs in communication with the force sensor. This indicates a potential issue with the sensor's interface unit or its connection cable.
Repair Steps
- 1
Remove the cable connected to the CRS50 connector, turn on the power, and check whether the ER0~2 LEDs change.
- 2
If one of the ER0~2 LEDs lights up after re-powering with the cable removed, replace the sensor I/F unit.
- 3
If all of the ER0~2 LEDs are turned off after re-powering with the cable removed, check the sensor connection cable connected to CRS50 for any abnormalities.
Verified technical data. Last updated: March 2026
Source: Fanuc R-30iB Mate + Mate Plus Robot