LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free →

KUKA Error KSS27004 — Safe mastering (SafeOperation/SafeMove)

Info

KUKA KSS27004 (“Safe mastering (SafeOperation/SafeMove)”): Request for a mastering reference check (mastering) by the safety section: normally appears after a cold start of a SafeMove robot or if the reference position has not been validated.

Updated 2026-09-09 · LogrobotLM reference

Cause

Request for a mastering reference check (mastering) by the safety section: normally appears after a cold start of a SafeMove robot or if the reference position has not been validated.

Related codes

KSS00126Servo drive (KSD/KSP) + mechanical drive train of the axisKSS00276Machine data vs hardware (RDC/EDS, disk)KSS00364Mode selector / 27 V power supply of the PC (KPC) / CIBKSS01146Motor / axis brake / servo drive

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 →