Yaskawa Large Capacity Sigma II Series - Manual (Page 367)

8 Inspection, Maintenance, and Troubleshooting
8.2.1 Troubleshooting Problems with Alarm Displays
8-28
„ A.CA
A.CA: Encoder Parameter Error
Display and Outputs
Note: OFF:Output transistor is OFF (alarm state). ON: Output transistor is
ON.
Status and Remedy for Alarm
„ A.Cb
A.Cb: Encoder Echoback 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
At power ON A, B