Yaskawa FSP Amplifier - Manual (Page 289)

FSP Amplifier User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
9-24
„ A.85: Absolute Encoder Overspeed
Display and Outputs
Alarm Outputs
Alarm Code Output
ALO1 ALO2 ALO3
ALM Output
OFF OFF OFF OFF
Note: OFF: Output transistor is OFF (alarm state).
Status and Remedy for Alarm
At power ON. A, B
Cause of the Problem Solution
A
Absolute encoder turned ON at
motor speed exceeding
200 rpm.
Turn ON power supply with
the servomotor stopped.
B Defective circuit board (1PWB). Replace servo amplifier.