EL
ErrorLib
Brands
||
  1. Home
  2. Fanuc
  3. AC Spindle Motor Alpha i-Beta i Series Parameters
  4. SP1220
About·Privacy·Terms

ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

SP1220

Serial Spindle Amplifier Disconnected (30i)

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

What does SP1220 mean?

The cable connected to the serial spindle amplifier for Series 30i is disconnected, or no serial spindle amplifier is connected. This prevents communication and control of the spindle.

Common Causes

  • Serial spindle amplifier disconnected or not communicating (30i).
  • Spindle drive communication failure.
  • Faulty connection to the serial spindle amplifier.
  • Spindle amplifier offline or unresponsive.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the serial communication cable connection between the CNC and the spindle amplifier.

  2. 2

    Confirm that a serial spindle amplifier is physically connected to the system for Series 30i.

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

Related Faults

749Serial Communication Error during Activation750Spindle Amplifier Not Activated (16i)PS0223Spindle Not Set for Control
Source: Fanuc AC Spindle Motor Alpha i-Beta i Series Parameters
Open Manual (Page 34)Search more codes in this manual