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
Confirm the serial port is enabled in the CNC parameters (e.g., P71-01).
- 2
Check if the spindle amplifier is powered and its status indicator is normal.
- 3
Measure the voltage at the serial communication terminals (e.g., TXD, RXD).
- 4
Re-seat the serial cable connector at both the CNC and the spindle amplifier.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fanuc AC Spindle Motor Alpha i-Beta i Series Parameters