FANUC Alarm PRIO-094 — Overload Rack:… Slot:… DO:…-…
Error- Hardware
- I/O Link and process I/O
- Controllers
- R-30iA (this generation only)
- FANUC class
- STOP
- Hardware family
- FANUC I/O Link, process I/O board, fuse and output alarms
Manufacturer wording — Overload Rack:%d Slot:%d DO:%d-%d
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PRIO-094 (“Overload Rack:… Slot:… DO:…-…”): The specified DO may be grounded. First check: Please check the connection of the specified DO.
Updated 2026-10-22 · LogrobotLM reference
Description
The specified DO may be grounded.
Remedy
Please check the connection of the specified DO.
Field diagnosis
The designated digital output is probably shorted to ground.
What to check
- Check the wiring of the indicated output and the connected actuator.
- Note: R-30iA code; the DO range indicates the protected output group.
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 →