KUKA Error 300 — OPERATING MODE CHANGE
ErrorDisplayed as KSS00300 on KRC4 / KRC5 controllers
KUKA 300 (“OPERATING MODE CHANGE”): The mode selector switch is in a prohibited position. First check: Set the mode selector switch to a valid position.
Updated 2026-09-09 · LogrobotLM reference
Cause
The mode selector switch is in a prohibited position.
Effect
Path-maintaining stop. All active commands inhibited.
Troubleshooting
Set the mode selector switch to a valid position.
Related codes
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 →