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KUKA Error 1220 — ACK EMERGENCY STOP DUE TO UNMASTERING

Error

Displayed as KSS01220 on KRC4 / KRC5 controllers

KUKA 1220 (“ACK EMERGENCY STOP DUE TO UNMASTERING”): Pressing the softkeys for rotation calibration. First check: Press the escape key twice.

Updated 2026-09-09 · LogrobotLM reference

Cause

Pressing the softkeys for rotation calibration.

Effect

Path-maintaining stop. All active commands inhibited. Output "$ALARM_STOP" receives signal "0".

Troubleshooting

Press the escape key twice.

Related codes

1219ACK SBX -- KCP CONNECTED1218ACK SBX -- KCP INPUT NOT IN PLACE1217ACK SBX -- KCP CONNECTED INPUT1214POWER FAILURE

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 →