Yaskawa MP940 - Manual (Page 391)

SERVOPACK Inspection, Maintenance, and Troubleshooting
10.2.1 Troubleshooting Problems with Alarm Displays
10-24
„ 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 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 discon-
nected. Check wiring and connectors at
encoder.
B Encoder defective. Replace servomotor.
C SERVOPACK defective. Replace SERVOPACK.
A,B At power ON
A,B,C At power ON