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ErrorLib — Industrial Fault Code Library

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SP9079

SAFETY FUNCTIONS AT POWER-UP NOT EXECUTED

Fanuc · Alpha i Series Servo Amplifier

What does SP9079 mean?

The safety functions designed to run during power-up for the spindle were not executed. This indicates a critical issue during the spindle system's initialization sequence related to safety, which could prevent safe operation.

Common Causes

  • Safety functions were not completed or validated after the system powered up.
  • Initial safety checks failed during system startup sequence.
  • Safety PLC program did not load or initialize correctly.
  • Critical safety hardware not ready at power-on.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Replace the SPM control printed-circuit board.

Browse all codes in this manual (101)
Verified technical data. Last updated: April 2026

Related Faults

0233Velocity Pulse Count Exceeded0243Position Pulse Count Exceeded0434Velocity Loop Integral Gain Overflow
Source: Fanuc Alpha i Series Servo Amplifier
Open Manual (Page 126)Search more codes in this manual