SRVO-235

Short Term Single Chain Failure

Fanuc · R-30iB Mate + Mate Plus Robot

What does SRVO-235 mean?

A short-term single chain failure condition is detected. This can be caused by a momentary or 'half' release of the DEADMAN switch or a 'half' operation of the emergency stop switch, indicating a transient safety circuit anomaly.

Repair Steps

  1. 1

    Cause the same error to occur again, and then perform the alarm resetting procedure.

  2. 2

    Replace the emergency stop board.

  3. 3

    Replace the 6-Axis servo amplifier.

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