Yaskawa Large Capacity Sigma II Series - Manual (Page 366)

8.2 Troubleshooting
8-27
8
„ A.C8
A.C8: Absolute Encoder Clear Error and Multiturn Limit Setting Error
Display and Outputs
Note: OFF:Output transistor is OFF (alarm state). ON: Output transistor is
ON.
Status and Remedy for Alarm
„ A.C9
A.C9: Encoder Communications Error
Display and Outputs
Note: OFF:Output transistor is OFF (alarm state). ON: Output transistor is
ON.
Status and Remedy for Alarm
Alarm Outputs
Alarm Code Outputs ALM Output
ALO1 ALO2 ALO3
ON OFF ON OFF
Cause Remedy
A Encoder defective. Replace the servomotor.
B SERVOPACK defective. Replace SERVOPACK.
Alarm Outputs
Alarm Code Outputs ALM Output
ALO1 ALO2 ALO3
ON OFF ON OFF
Cause Remedy
A Encoder wiring incorrect or disconnected Check wiring and connectors at encoder.
B Encoder defective. Replace the servomotor.
C SERVOPACK defective. Replace SERVOPACK.
At power ON A, B
When resetting multiturn clear
encoder alarm
A, B
At power ON A, B, C
During servomotor
operation
A, B, C