What the MOTN-056 alarm means

The programmed speed was clamped by a system speed limit (for example T1 mode limits). Mostly informational, but it tells you the cycle will not run at taught speed. This is one of the faults our repair team handles most often — the cause is usually identifiable within the first on-site inspection.

Most common causes

  • T1 teach mode speed limit active
  • Safety speed limits from DCS or cell controller
  • Override setting reduced
Field note: the first item on this list is what we find most often on real machines. Check it before you go deeper.

Step-by-step field fix

  1. Confirm the controller mode (T1/T2/AUTO)
  2. Check speed override
  3. If DCS speed functions are configured, review their zones
Safety first: never bypass safety circuits or force contactors closed. If the alarm involves E-stop chains or servo power, and you are not a trained robot technician, contact a professional — wrong moves here can cost you a robot or an injury.

Still stuck? Get an engineer on the phone — right now

Tell us the alarm code, the robot model and what was happening when the alarm came up. Our engineers run these diagnostics every day, and remote diagnosis by phone or video call is free.

Get a Free Remote Diagnosis See Repair Services

Hotline: +86-20-39029800 · WhatsApp: +86-188-1886-2860

Related Motion & Path alarms

MOTN-017 — Limit Error (Group / Axis) MOTN-018 — Position Not Reachable MOTN-023 — In Singularity
Other brands: see our KUKA, ABB, Yaskawa and Universal Robots field-fix libraries — or the full 10-brand hub.

Frequently asked questions

QWhat does the FANUC MOTN-056 alarm mean?

The programmed speed was clamped by a system speed limit (for example T1 mode limits). Mostly informational, but it tells you the cycle will not run at taught speed. In field practice it belongs to the motion & path family of faults.

QCan I clear a FANUC MOTN-056 alarm myself?

Sometimes. Follow the step-by-step checks on this page — start with the first cause listed, which is what we find most often in the field. If the alarm returns after two attempts, or the fault involves power/safety circuits, stop and call a qualified robot service engineer.

QHow fast can a Henghuan engineer help?

On-site response in the Pearl River Delta within 30 minutes to 3 hours, across mainland China in 1–3 business days, and worldwide within 2–5 business days. Remote diagnosis by phone/WhatsApp/video is available immediately.

Written by the Henghuan Robotics repair team from field service experience. Alarm descriptions are our own summary for troubleshooting reference and may vary by controller version — when in doubt, check your FANUC documentation or contact us. Henghuan is an independent service provider, not affiliated with or endorsed by FANUC.