Applicable Systems
Series 0i
Series 16/18/21
Alpha
Beta
Symptoms
The VRDY signal is off for the fourth axis servo.
Possible Causes
- Fourth axis servo amplifier is not ready or has tripped.
- Servo amplifier power supply failure for the fourth axis.
Troubleshooting Steps
- Step 1: Check the fourth axis servo amplifier status and power supply.
Amplifier status verified. - Step 2: Reset the servo amplifier or replace if faulty.
VRDY signal returns to normal.
How to Reset
Fix the servo amplifier issue and reset to clear the alarm.
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Source: Fanuc 0i/0iMate Alarm Code List, FANUC Corporation
Category: CNC
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