If you need further help optimizing your controller, tell me: Common CNC Machine Parameter Guide - ALLPCB
: Setting bit 0 (the rightmost digit) of parameter 8901 to 1 disables the 701 alarm, allowing the controller to ignore a faulty fan. fanuc parameter 8901 better
Making parameter 8901 "better" isn't about setting it and forgetting it. It's about strategic use in an emergency. The primary legitimate scenario for enabling this parameter is when a fan fails and you do not have an immediate replacement on hand. If you need further help optimizing your controller,
The primary and most well-known application of Parameter 8901 is as an emergency bypass for the ALM 701 fan alarm. The primary and most well-known application of Parameter 8901 is as an emergency bypass for the ALM 701 fan alarm. In urgent situations where a fan has failed and a replacement is not immediately available, setting will instruct the CNC to "not detect" the fan motor error, thereby masking the alarm and allowing the machine to resume operation. The primary legitimate scenario for enabling this parameter
This combination is widely considered by Fanuc field service engineers as the “better” configuration for precision, reliability, and speed.