FANUC Alarm PNT2-181 — Non-decreasing canister position
FANUC PNT2-181 (“Non-decreasing canister position”): If the gun has been on for the amount of time specified as Canister Check Time and the amount of change in cylinder position counts has not reached the Minimum Canister Change Counts, this alarm will post. First check: Lower the Minimum Canister Change Counts or increase the Canister Check Time.
Updated 2026-09-17 · LogrobotLM reference
Description
If the gun has been on for the amount of time specified as Canister Check Time and the amount of change in cylinder position counts has not reached the Minimum Canister Change Counts, this alarm will post. This can be caused by low flow rates, where it takes longer to see this minimum cylinder position change. This could be an indicator of trouble with the linear potentiometer or the feedback circuit.
Remedy
Lower the Minimum Canister Change Counts or increase the Canister Check Time. Check the feedback from the linear potentiometer or repair the low voltage wire for the canister feedback circuit.
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 →