Alarm 6
Software Disconnection (α Pulse Coder)
Fanuc · αi Series Servo Amplifier
What does Alarm 6 mean?
This alarm is issued when the absolute position data sent from the built-in α pulse coder cannot be synchronized with the phase data.
Repair Steps
- 1
Turn off the NC (Numerical Control) power.
- 2
Remove the pulse coder cable.
- 3
Attach the pulse coder cable again securely.
- 4
If this alarm is issued again after re-attaching the cable, replace the pulse coder.
Verified technical data. Last updated: March 2026
Source: Fanuc αi Series Servo Amplifier