A technician may manually change this bit to "0" to force a new home position calibration. 3. How to Set or Reset Parameter 1860
If you disconnect the motor from the ball screw, the physical relationship between the encoder and the machine zero changes.
Unplugging the encoder cable or replacing the motor/encoder resets the stored position.
When a machine is equipped with absolute encoders, it does not require a manual "home" or zero-return operation every time it is powered on, provided the absolute position is correctly saved. Parameter 1860 is the system's "flag" that tells it whether this position is currently valid. 1. The Core Meaning of Parameter 1860