SP0985

Automatic Parameter Setting Failed (15i)

Fanuc · AC Spindle Motor Alpha i-Beta i Series Parameters

What does SP0985 mean?

Automatic parameter setting for the spindle amplifier (Series 15i) failed. This means the system could not correctly configure the spindle parameters automatically.

Common Causes

  • Communication error during automatic parameter download.
  • Incorrect parameter data format received by the amplifier.
  • Spindle amplifier unable to store received parameters (e.g., EEPROM issue).
  • Software incompatibility between CNC and amplifier for parameter setting.
  • Timeout waiting for confirmation of parameter write.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that parameter P7-01 (or equivalent) is set to enable automatic parameter setting.

  2. 2

    Manually input a few key parameters (e.g., P1-54) and attempt auto-setting again.

  3. 3

    Confirm the data transfer protocol for automatic parameter setting is correct.

  4. 4

    Check for any error messages displayed on the CNC related to parameter transfer.

  5. 5

    Inspect the amplifier's EEPROM for physical damage or signs of wear.

Browse all codes in this manual (60)
Verified technical data. Last updated: March 2026

Related Faults

Source: Fanuc AC Spindle Motor Alpha i-Beta i Series Parameters