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Sigma II User's Manual
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A.C9
A.C9: Encoder Communications Error
Display and Outputs
Status and Remedy for Alarm
Incorrect or disconnected encoder
A
wiring.
B
Defective encoder.
C
Defective servo amplifier.
Alarm Outputs
Alarm Code Output
ALO1
ALO2
ON
OFF
Note:
OFF:
Output transistor is OFF (alarm state).
ON:
Output transistor is ON.
During servomotor operation.
Cause of the Problem
Chapter 9: Inspection, Maintenance, and Troubleshooting
ALM Output
ALO3
ON
OFF
At power ON.
A, B, C
Solution
Check wiring and connectors at the
encoder.
Replace servomotor.
Replace servo amplifier.
9-28
A, B, C
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