Robotics in Manufacturing
MOTN-000

MOTN-000: Unknown Internal Motion Error

A catch-all internal system error that shouldn't show up during normal operation.

What it means

A catch-all internal system error that shouldn't show up during normal operation. It generally points to corrupted memory or a software mismatch.

Common causes

Ranked by what technicians most often find, most likely first.

  1. Incorrect loading or setup of the system software.
  2. Loading incompatible or mutually exclusive options.
  3. Mixing software versions when adding options.
  4. General memory corruption.

How to fix it

  1. Perform a cold start.
  2. Perform an init start and set up the robot again.
  3. Confirm that any options or add-on software not on the original distribution media matches the correct version number. If the system software came on multiple disks or memory cards, use a matched set and the installation manual for this software version.
  4. Confirm that no incompatible or mutually exclusive options have been loaded.
  5. If versions don't match, do a full software reload with the correct software.
  6. If the error persists, document the events leading up to it and contact your local FANUC representative.

Quick facts

Category
Motion
Affected series
R-30iB; R-30iB Mate; R-30iB Plus; R-30iB Mate Plus
Alarm family
MOTN

Verified against FANUC documentation (B-83284EN-1).Last reviewed: 2026-07-12.Editorial process