Yaskawa Large Capacity Sigma II Series - Manual (Page 357)

8 Inspection, Maintenance, and Troubleshooting
8.2.1 Troubleshooting Problems with Alarm Displays
8-18
„ A.81
A.81: Absolute Encoder Backup Error
Display and Outputs
Note: OFF: Output transistor is OFF (alarm state).
Status and Remedy for Alarm
Alarm Outputs
Alarm Code Outputs ALM Output
ALO1 ALO2 ALO3
OFF OFF OFF OFF
Cause Remedy
A The following power supplies to the abso-
lute encoder all failed:
• +5 V supply
• Battery power
Follow absolute encoder set-up procedure.
B Absolute encoder malfunctioned. Replace the servomotor.
C Circuit board (1PWB) defective. Replace SERVOPACK.
At power ON
Pn002.2 = 0 or 2
Pn002.2 = 1
A, B, C
C