Troubleshooting steps
Check servo amplifier status verify encoder connections test motor check wiring connections
FANUC
440 – Pulse coder alarm
Pulse coder communication error
Details
Pulse coder communication error. Check servo amplifier status and encoder connections.
Error typealarm
MeaningPulse coder alarm
Typical causesServo amplifier fault encoder fault motor fault wiring fault
SolutionsCheck servo amplifier status verify encoder connections test motor check wiring connections
Severityhigh
Catalog references
System Information
FANUC440
Utilities
Troubleshooting Steps
Related
Related FANUC Alarms
FAQ
Common questions
Which axis is affected?
Check alarm message for axis number and servo diagnostic screen