SP9078

MISSMATCH THE RESULTS OF SAFETY PARAMETER

Fanuc · Alpha i Series Servo Amplifier

What does SP9078 mean?

The spindle CPU detected a mismatch between the CNC result of the safety parameters check and the spindle's own result. This indicates an inconsistency in safety parameter values (No.4372/No.4438/No.4440/No.4442/No.4448) between the CNC and spindle, potentially affecting safety operations.

Common Causes

  • Safety parameters stored in different locations do not match.
  • Data inconsistency in safety configuration stored across multiple memory units.
  • Checksum error on safety parameter blocks.
  • Failed write operation to non-volatile safety parameter memory.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Set the spindle safety parameters (No.4372/No.4438/No.4440/No.4442/No.4448) again to ensure consistency between the CNC and spindle.

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Verified technical data. Last updated: March 2026

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Source: Fanuc Alpha i Series Servo Amplifier