(e.g., using an external industrial fan directed at the cabinet) until the internal fan can be replaced. Restoration : Once the new fan is installed, you must set PRM 8901 back to 0 to ensure future protection. How to Modify To change this parameter, you typically need to: Parameter Write Enable (PWE) by setting PARAMETER WRITE = 1 on the SETTING screen. Emergency Stop
FANUC makes powerful CNC hardware, but optimal performance demands careful parameter tuning. Parameter 8901 is one of the most effective knobs you can turn to make your machine truly "better" at high-speed, high-precision work.
While provides a temporary workaround to get a machine running by shielding the 701 Fan Alarm , it is not a permanent solution. A truly "better" machine operates with a properly functioning cooling system. Use this parameter only for emergency situations and prioritize replacing the faulty fan to avoid catastrophic amplifier failures. If you're interested, I can:
To optimize your machine beyond a basic software bypass, focus on real hardware remediation. Shielding the alarm gets your machine running today, but implementing the following steps ensures your equipment performs better for years to come: fanuc parameter 8901 better
When a fan drops below its rated RPM or stops entirely, the system registers a .
Always consult the specific machine manufacturer's maintenance manual as parameter functions can differ between models (e.g., Series 0i-TD, 16i-18i-21i).
Modifying parameters on a FANUC control screen requires accessing the System Parameters via Manual Data Input (MDI) mode. Follow this sequence precisely: Emergency Stop FANUC makes powerful CNC hardware, but
The CNC control commands an immediate emergency stop (E-stop), freezing all axes and spindle rotations instantly.
The path to "better" FANUC operation involves a clear set of priorities:
Change it from 0 to . (A PS100 alarm will appear; ignore this for now). Navigate to Parameter 8901: Press the [SYSTEM] key. Press the [PARAM] soft key. Type 8901 and press the [NO. SEARCH] soft key. Adjust the Setting: A truly "better" machine operates with a properly
Why Adjusting Parameter 8901 is "Better" (The Strategic Approach)
) detects that a cooling fan has slowed down or failed, it triggers