It is a critical, read-only system parameter used by the CNC to track exactly where an axis is relative to its reference (home) position. If the value in Parameter 1860 is lost or incorrect—often due to a battery failure—the machine will lose its "sense" of where it is, leading to homing alarms. What is the Function of Parameter 1860?
When you power on a Fanuc machine equipped with absolute encoders: fanuc parameter 1860 work
If the system detects a discrepancy between the physical position and the value in 1860, it may trigger a "Request for Reference Position Return". How Parameter 1860 Works During Startup It is a critical, read-only system parameter used
It compares this value against the stored data in Parameter 1860 . When you power on a Fanuc machine equipped
Understanding Fanuc Parameter 1860: Reference Position and Absolute Encoders