Omron OMNUC W Series Manual page 242

A.C8
A.C8: Multi-turn Data Error
Display and Outputs
Alarm Outputs
Alarm Code Outputs
ALO1 ALO2
ON OFF
Note OFF: Output transistor is OFF (alarm state). ON: Output transistor is ON.
Status and Remedy for Alarm
At power ON
Cause
A
Encoder is defective.
B The Servo Driver is defective.
A.C9
A.C9: Encoder Communications Error
Display and Outputs
Alarm Outputs
Alarm Code Outputs
ALO1 ALO2
ON OFF
Note OFF: Output transistor is OFF (alarm state). ON: Output transistor is ON.
Status and Remedy for Alarm
During Servomotor
operation
Cause
A Encoder wiring incorrect or disconnected.
B Encoder is defective.
C The Servo Driver is defective.
9-31
9.3 Troubleshooting with Alarm Displays
ALM Output
ALO3
ON OFF
At absolute encoder setup
A, B
Replace the Servomotor.
Replace the Servo Driver.
ALM Output
ALO3
ON OFF
A, B, C
At power ON
Check wiring and connectors at encoder.
Replace the Servomotor.
Replace the Servo Driver.
A, B
Remedy
A, B, C
Remedy
9