LogrobotLM

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KUKA Error 1531 — NOT IN T1 MODE, CALIBRATION NOT POSSIBLE

Error

Displayed as KSS01531 on KRC4 / KRC5 controllers

KUKA 1531 (“NOT IN T1 MODE, CALIBRATION NOT POSSIBLE”): Operating mode not set to T1. First check: Set T1 mode.

Updated 2026-09-09 · LogrobotLM reference

Cause

Operating mode not set to T1.

Effect

Stop via braking ramp. All active commands are inhibited.

Troubleshooting

Set T1 mode. Calibrate again. Acknowledge the message.

Related codes

1530REDUCED VELOCITY DURING REFERENCING1532THE CIRCLE WILL BE EXECUTED AS A LIN1529SEGMENT CHANGE SUCCESSFUL1528BRAKES RELEASED DURING CALIBRATION

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 →