Yaskawa FSP Amplifier - Manual (Page 285)

FSP Amplifier User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
9-20
„ A.81: Absolute Encoder Backup Power Supply 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.
When parameter
Pn 002.2 = 0 or 2
A, B, C
C
When parameter
Pn 002.2 = 1
Cause of the Problem Solution
A
The following power supplies to
the absolute encoder both failed:
• +5 V supply
• Battery power
Follow absolute encoder setup
procedure.
B Absolute encoder malfunctioned. Replace servomotor.
C Defective circuit board (1PWB). Replace servo amplifier.