Omron XTRADRIVE User Manual page 263

XtraDrive User Manual
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A.84: Absolute Encoder Data Error
Display and Outputs
ALO1
OFF
Note: OFF: Output transistor is OFF (alarm state).
Status and Remedy for Alarm
At power ON.
A
B
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A.85: Absolute Encoder Overspeed
Display and Outputs
ALO1
OFF
Note: OFF: Output transistor is OFF (alarm state).
Status and Remedy for Alarm
At power ON.
A
B
Chapter 9: Inspection, Maintenance, and Troubleshooting
Alarm Outputs
Alarm Code Output
ALO2
OFF
Cause of the Problem
Malfunctioning absolute encoder.
Operational error in encoder
caused by external noise
Alarm Outputs
Alarm Code Output
ALO2
OFF
Cause of the Problem
Absolute encoder turned ON at
motor speed exceeding 200rpm.
Defective circuit board (1PWB).
9-15
ALM Output
ALO3
OFF OFF
During servomotor
A
Replace servomotor if error occurs
frequently.
Check and correct wiring around the
encoder, (grounding of servomotor,
separation of encoder and power
cables, insertion of toroidal cores onto
cables to reduce noise, etc.)
ALM Output
ALO3
OFF OFF
A, B
Solution
Turn ON power supply with
the servomotor stopped.
Replace servo amplifier.
operation
Solution
B