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FANUC Alarm FXTL-068 — Invalid PLC command: T…

Manufacturer wording — Invalid PLC command: T%d
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC FXTL-068 (“Invalid PLC command: T…”): The PLC sent a command that is invalid or not supported. First check: Correct the PLC logic to send only valid command codes.

Updated 2026-09-17 · LogrobotLM reference

Description

The PLC sent a command that is invalid or not supported.

Remedy

Correct the PLC logic to send only valid command codes.

Related codes

FXTL-066Invalid group numberFXTL-067Duplicate group numberFXTL-069Invalid PLC data value: T…FXTL-070Tray … ESR not possible

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 →