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FANUC Alarm SRVO-271 — SERVO EXEMG2 status abnormal

Error
Hardware
emergency stop and dual safety chains
Controllers
R-J3iB / R-30iA / R-30iB
FANUC class
SERVO
Hardware family
FANUC emergency stop, pendant and dual safety chain alarms

FANUC SRVO-271 (“SERVO EXEMG2 status abnormal”): The SVDISC1 status is still ON when the SVDISC signal is asserted. First check: Repair the SVDISC1 circuit.

Updated 2026-10-22 · LogrobotLM reference

Description

The SVDISC1 status is still ON when the SVDISC signal is asserted.

Remedy

Repair the SVDISC1 circuit.

Field diagnosis

Chain alarm on channel 2 of the external emergency stop.

What to check

  • EES circuit on both channels, timing, then the teach pendant cable and the emergency stop board.
  • Release: emergency stop pressed/released, RES_1CH, RESET.
  • Note: Read together with SRVO-270: lagging channel or board.

Related codes

SRVO-270SERVO EXEMG1 status abnormalSRVO-007SERVO External emergency stopsSRVO-204SYSTEM External(SVEMG abnormal) E-stopSRVO-269SERVO SVOFF2 status abnormalSRVO-272SERVO SVDISC1 status abnormalSRVO-273SERVO SVDISC2 status abnormal

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →