The system relies on diagnostic bits to tell technicians exactly why the drive tripped. On classic FANUC 0 control systems, you must check . On modern controls like the FANUC 16i, 18i, 21i, and 0i series, you must check Diagnostics 200 and 204 .
Verified the Z-axis is not physically jammed or at a hard limit. Questions: fanuc 414 servo alarm z axis detect error repack
For suspected motor-related faults: