FANUC Alarm FRCE-171 — F/S output data frozen (F:…)
Manufacturer wording — F/S output data frozen (F:%d^1)
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC FRCE-171 (“F/S output data frozen (F:…)”): The output data from the sensor head is frozen (unchanging). First check: 1. Check the force sensor output data on TP (Force sensor status screen). Likely part: Sensor board (Sensor interface board).
Updated 2026-09-17 · LogrobotLM reference
Description
The output data from the sensor head is frozen (unchanging).
Remedy
1. Check the force sensor output data on TP (Force sensor status screen). The value must vary slightly over time due to sensor background noise. If the value is constant, it is frozen; go to the next step. 2. Check the sensor cable connectivity. Check also for cut lines. If there is nothing wrong, go to the next step. 3. Replace the sensor board. If this
Part to check / replace
FANUC FRCE-171 points to the hardware below — start here before ordering.
Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.
Related codes
Same hardware involved
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 →