FANUC Alarm OS-144 — SYST System error …, … at …
Manufacturer wording — SYST System error %x, %x at %x
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC OS-144 (“SYST System error …, … at …”): An unknown register dump occurred. First check: Contact the FRNA hotline and provide the following information for further investigation.
Updated 2026-09-17 · LogrobotLM reference
Description
An unknown register dump occurred.
Remedy
Contact the FRNA hotline and provide the following information for further investigation. o Record the entire error message(s) that occurred including any program running at the time of the system error. o Retrieve the following files from the File Menu: md:histe.ls md:histr.ls md:hists.ls md:histp.ls md:conslog.ls md:errall.ls o In addition for a system V5.22 or greater, do a diagnostic backup from the file menu to send to FRNA.
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 →