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KUKA Error KSS00126 — Servo drive (KSD/KSP) + mechanical drive train of the axis

Info

KUKA KSS00126 (“Servo drive (KSD/KSP) + mechanical drive train of the axis”): Message “Regler-Limit überschritten / Regulator limit exceeded (A#)”: the servo control loop is saturating, the axis can no longer follow the command value. Likely part: KSD (KUKA Servo Drive (KSD generation)) +4 more.

Updated 2026-09-09 · LogrobotLM reference

Cause

Message “Regler-Limit überschritten / Regulator limit exceeded (A#)”: the servo control loop is saturating, the axis can no longer follow the command value. Typical causes: axis mechanically blocked (collision, seized gear unit), brake that does not release, faulty motor cable or motor, or weakened power stage of the servo drive.

Part to check / replace

KUKA KSS00126 points to the hardware below — start here before ordering.

Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.

Related codes

KSS00276Machine data vs hardware (RDC/EDS, disk)KSS00364Mode selector / 27 V power supply of the PC (KPC) / CIBKSS01146Motor / axis brake / servo driveKSS01305KSP servo drive / DC link (KPP power supply)

Same hardware involved

KSS15073Servo drive unitKSS26158Servo drive unit1528Motor brakeKSS15047Motor brake

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 →