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FANUC Alarm SRVO-202 — SERVO TP E-stop or SVEMG abnormal

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

FANUC SRVO-202 (“SERVO TP E-stop or SVEMG abnormal”): The teach pendant emergency stop push button is pressed and miswiring on SVEMG is detected. First check: Check the wiring of SVEMG.

Updated 2026-10-22 · LogrobotLM reference

Description

The teach pendant emergency stop push button is pressed and miswiring on SVEMG is detected.

Remedy

Check the wiring of SVEMG. If the wiring of SVEMG is not connected, correct the wiring of SVEMG. If the wiring has no problem, twist the teach pendant emergency stop push button clockwise to release. Press RESET. Refer to the maintenance manual for details.

Field diagnosis

The teach pendant emergency stop button was pressed without the emergency stop line opening.

What to check

  • Release, then reset.
  • If it repeats, suspect the teach pendant, then its cable, as the internal contact no longer opens one of the two channels.
  • A slow press on the button can trigger the code without any real fault.
  • Note: Same logic as SRVO-201, on the teach pendant side; the latched version is SRVO-278.

Related codes

SRVO-278SYSTEM TP E-stop(SVEMG abnormal)SRVO-002SERVO Teach pendant E-stopSYST-023SYSTEM Teach Pendant communication errorSRVO-200WARN Control box fan abnormalSRVO-201SERVO Panel E-stop or SVEMG abnormalSRVO-203SVON input(SVEMG 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 →