In Fanuc CNC systems, Parameter 8901 is specifically used to manage fan-related alarms, such as the "701 Fan" alarm, which occurs when a system cooling fan fails or stops rotating properly.
System Safety: Manuals emphasize that this is a bypass; for safe operation, the faulty fan should be replaced as soon as possible to prevent overheating the CNC unit. fanuc parameter 8901 better
Bit 0 (FAN): This bit determines whether the CNC monitors the cooling fans within the control unit. In Fanuc CNC systems, Parameter 8901 is specifically
Fan motor error is not detected. The alarm is suppressed, allowing the machine to run despite a fan fault. Guide: How to Safely Manage Parameter 8901 Your machine uses spindle orientation (M19) + synchronous