FANUC Alarm FXTL-079 — Sub-CPU did not start
FANUC FXTL-079 (“Sub-CPU did not start”): One or more of the sub-CPUs did not start up or was not detected on the internal network. First check: Determine the reason for the CPU startup failure, or try cycling power on the controller.
Updated 2026-09-17 · LogrobotLM reference
Description
One or more of the sub-CPUs did not start up or was not detected on the internal network. The tray(s) that depend on the positioners on that CPU could not be auto data-verified.
Remedy
Determine the reason for the CPU startup failure, or try cycling power on the controller.
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 →