SRVO-221

Missing DSP Axis Card

Fanuc · R-30iB Mate + Mate Plus Robot

What does SRVO-221 mean?

A controlled axis card (DSP) corresponding to the configured number of axes is not physically mounted or detected. This indicates a hardware configuration mismatch or a faulty axis control card.

Repair Steps

  1. 1

    Check whether the set number of axes is valid; if invalid, set the correct number.

  2. 2

    Replace the axis control card with a card that corresponds to the set number of axes.

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Verified technical data. Last updated: March 2026
Source: Fanuc R-30iB Mate + Mate Plus Robot
Fanuc Error SRVO-221: Missing DSP Axis Card — Troubleshooting Guide | ErrorLib