Yaskawa FSP Amplifier - Manual (Page 295)

FSP Amplifier User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
9-30
„ A.C9: Encoder Communications Error
Display and Outputs
Alarm Outputs
Alarm Code Output
ALO1 ALO2 ALO3
ALM Output
ON OFF ON OFF
Note: OFF: Output transistor is OFF (alarm state).
ON: Output transistor is ON.
Status and Remedy for Alarm
During servomotor
operation
At power ON. A, B, C A, B, C
Cause of the Problem Solution
A
Incorrect or disconnected
encoder wiring. Check wiring and connectors
at the encoder.
B Defective encoder. Replace servomotor.
C Defective servo amplifier. Replace servo amplifier.