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