SP9016

RAM Error (16i, 30i)

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

What does SP9016 mean?

A RAM error is detected in the spindle amplifier for Series 16i or 30i. This indicates a problem with the amplifier's internal memory.

Common Causes

  • Internal RAM failure within the spindle amplifier.
  • Power supply fluctuations affecting amplifier memory.
  • Environmental factors like excessive heat or vibration.
  • Firmware corruption in the amplifier.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Power cycle the spindle amplifier and CNC control.

  2. 2

    Measure DC link voltage (e.g., across terminals P and N on the amplifier) for stability.

  3. 3

    Inspect amplifier heatsink for excessive temperature.

  4. 4

    Perform amplifier firmware update if available and recommended.

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Verified technical data. Last updated: March 2026

Related Faults

SP0970Spindle Control Initialization Not Terminated (15i)SP1225CRC Communication Error (CNC-Spindle, 30i)SP1226Framing Error (CNC-Spindle, 30i)
Source: Fanuc AC Spindle Motor Alpha i-Beta i Series Parameters
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