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
Verify that parameter P7-01 (or equivalent) is set to enable automatic parameter setting.
- 2
Manually input a few key parameters (e.g., P1-54) and attempt auto-setting again.
- 3
Confirm the data transfer protocol for automatic parameter setting is correct.
- 4
Check for any error messages displayed on the CNC related to parameter transfer.
- 5
Inspect the amplifier's EEPROM for physical damage or signs of wear.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fanuc AC Spindle Motor Alpha i-Beta i Series Parameters