FANUC Alarm PNT1-901 — Wrong valve state in EMPTY CAN event…
Manufacturer wording — Wrong valve state in EMPTY CAN event%s
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PNT1-901 (“Wrong valve state in EMPTY CAN event…”): The wrong valve state was programmed in the color change cycle. First check: To correct the problem, ensure that the pDump valve OR pPE + pTRIG valves are in the step before the Empty Can event.
Updated 2026-09-17 · LogrobotLM reference
Description
The wrong valve state was programmed in the color change cycle. The valve interlocking requirements have not been satified for the Empty Can event in the color change cycle.
Remedy
To correct the problem, ensure that the pDump valve OR pPE + pTRIG valves are in the step before the Empty Can event.
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 →