ALM LED Blink (1:3)
Status Alarm (DO Ground Fault)
Fanuc · R-30iB Mate + Mate Plus Robot
What does ALM LED Blink (1:3) mean?
The red ALM LED blinks with a 1:3 duty cycle (0.5s ON / 1.5s OFF), indicating a general status alarm. A common example of such a status alarm is a Digital Output (DO) ground fault.
Repair Steps
- 1
Identify and remove the cause of the alarm.
Verified technical data. Last updated: March 2026
Source: Fanuc R-30iB Mate + Mate Plus Robot