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Sigma II User's Manual
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A.85
A.85: Absolute Encoder Overspeed
Display and Outputs
Status and Remedy for Alarm
Absolute encoder turned ON at motor
A
speed exceeding 200rpm.
B
Circuit board (1PWB) defective.
Alarm Outputs
Alarm Code Output
ALO1
ALO2
OFF
OFF
Not:
OFF:
Output transistor is OFF (alarm state).
At power ON.
Cause of the Problem
Chapter 9: Inspection, Maintenance, and Troubleshooting
ALM Output
ALO3
OFF
OFF
A, B
Solution
Turn ON power supply with the servo-
motor stopped.
Replace servo amplifier.
9-23
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