Troubleshooting steps
Check servo amplifier status verify encoder connections test motor check wiring
FANUC
428 – Servo ready
Servo ready signal off
Details
Servo ready signal off. Check servo amplifier status and encoder connections.
Error typealarm
MeaningServo ready
Typical causesServo amplifier fault encoder fault motor fault wiring fault
SolutionsCheck servo amplifier status verify encoder connections test motor check wiring
Severityhigh
Catalog references
System Information
FANUC428
Utilities
Troubleshooting Steps
Related
Related FANUC Alarms
FAQ
Common questions
Which axis is affected?
Check alarm message for axis number and servo diagnostic screen