The CNC reads the current value from the encoder.
It typically uses modular arithmetic, meaning the value "wraps around" based on the encoder's pulses per revolution.
Most issues related to Parameter 1860 arise after a or motor replacement. fanuc parameter 1860 work
When you power on a Fanuc machine equipped with absolute encoders:
Understanding Fanuc Parameter 1860: Reference Position and Absolute Encoders The CNC reads the current value from the encoder
It compares this value against the stored data in Parameter 1860 .
Master the Fanuc Zero Return Procedure in 5 Steps - CNCFixtech When you power on a Fanuc machine equipped
If the stored position in 1860 suggests the machine is outside its travel limits upon startup, you may need to power on while holding "P" and "CAN" (Cancel) to bypass the check and re-home the axis. Step-by-Step: Setting the Reference Position