FANUC Alarm PNT1-634 — Dyn. yield > min tolerance band
Manufacturer wording — %sDyn. yield > min tolerance band
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PNT1-634 (“Dyn. yield > min tolerance band”): As a particular flow rate set point is being output, the yield (slpm/cnt) for that flow rate was approximately larger than the percent tolerance. First check: Decrease the yield.
Updated 2026-09-17 · LogrobotLM reference
Description
As a particular flow rate set point is being output, the yield (slpm/cnt) for that flow rate was approximately larger than the percent tolerance. It is not likely that the set point will be reached within the specified tolerances. This might be caused by the use of a flow rate setpoint that is below the value that the air system can accurately provide.
Remedy
Decrease the yield. Use larger diameter air lines to supply air to the cap. Use a smaller ratio booster. Otherwise, accept a larger tolerance band. Increase the minimum tolerance (by about 50%).
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 →