FANUC Alarm MOTN-000 — WARN Unknown error (MO00)
FANUC MOTN-000 (“WARN Unknown error (MO00)”): Internal system error. First check: The system may have been corrupted.
Updated 2026-09-17 · LogrobotLM reference
Description
Internal system error. This class of error should not be encountered by the user during normal operation
Remedy
The system may have been corrupted. This may have been caused by any of a number of reasons including: Incorrect loading and setup loading incompatible options, mixing software version when adding options and other memory corruption problems. The following is a list of possible remedies: 1. Perform a cold start. 2. Perform an init start and setup the robot again 3. Confirm that any options or additional software not on the original software distribution media is the same version number. If the main system software was supplied on several disks or memory cards, make sure that you are using a matched set. Also make sure that the installation manual being used is for this version of software. If any of the software version are not matched, a complete reload with the correct software will be necessary. 4. Confirm that no incompatible or mutually exclusive option have been loaded. 5. Full software reload. 6. If the error is not cleared, document the events that led to the error and call your FANUC Robotics technical representative.
Related codes
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 →