FANUC Alarm PRIO-035 — WARN PLC interface serial fault …
Manufacturer wording — WARN PLC interface serial fault %d
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PRIO-035 (“WARN PLC interface serial fault …”): The serial link to a PLC has failed. First check: Check the LED status on PLC interface board.
Updated 2026-09-17 · LogrobotLM reference
Description
The serial link to a PLC has failed.
Remedy
Check the LED status on PLC interface board. Refer to the FANUC Robotics manual, A User’s Guide to the FANUC Robotics SYSTEM R-J3 Controller Remote I/O interface for an Allen- Bradley PLC or A User’s Guide to the FANUC Robotics Genius Network Interface for GE FANUC PLC.
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 →