SRVO-022

SRDY Signal On Prematurely

Fanuc · R-30iB Mate + Mate Plus Robot

What does SRVO-022 mean?

The SRDY signal is already ON when the HRDY signal is about to go ON. This means the servo system is indicating that the magnetic contactor is engaged before the host controller has commanded it to do so, suggesting an internal fault in the servo amplifier's control circuit.

Repair Steps

  1. 1

    Replace the servo amplifier.

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Verified technical data. Last updated: March 2026
Source: Fanuc R-30iB Mate + Mate Plus Robot