Yaskawa FSP Amplifier - Manual (Page 288)

FSP Amplifier User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
9-23
„ A.84: Absolute Encoder Data Error
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.
During servomotor
operation
A B
Cause of the Problem Solution
A Malfunctioning absolute encoder.
Replace servomotor if error occurs
frequently.
B
Operational error in encoder
caused by external noise
Check and correct wiring around the
encoder, (grounding of servomotor,
separation of encoder and power
cables, insertion of toroidal cores onto
cables to reduce noise, etc.)