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ErrorLib — Industrial Fault Code Library

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SP0228

Communication Error (CNC-Spindle Amplifier, 15i)

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

What does SP0228 mean?

A general communication error occurred between the CNC and the serial spindle amplifier for Series 15i. This is a broad indication of communication failure, requiring further investigation into the communication link.

Common Causes

  • A general communication failure between the CNC and the serial spindle amplifier (15i).
  • Incorrect serial port configuration on either device.
  • The spindle amplifier is not powered on or is in a fault state.
  • A break in the serial communication line.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Confirm the serial port is enabled in the CNC parameters (e.g., P71-01).

  2. 2

    Check if the spindle amplifier is powered and its status indicator is normal.

  3. 3

    Measure the voltage at the serial communication terminals (e.g., TXD, RXD).

  4. 4

    Re-seat the serial cable connector at both the CNC and the spindle amplifier.

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
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