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FANUC Alarm PRIO-033 — WARN PLC interface init. fault …

Manufacturer wording — WARN PLC interface init. fault %d
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC PRIO-033 (“WARN PLC interface init. fault …”): The PLC interface board is bad or not installed. First check: Check that the PLC interface board is properly installed.

Updated 2026-09-17 · LogrobotLM reference

Description

The PLC interface board is bad or not installed.

Remedy

Check that the PLC interface board is properly installed. 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.

Related codes

PRIO-022SYST Too much I/O data on I/O linkPRIO-023WARN No ports of this typePRIO-034WARN PLC interface general fault …PRIO-035WARN PLC interface serial fault …

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 →