To edit it, you must be in MDI mode and have Parameter Write Enable (PWE) set to 1.
In Fanuc CNC systems, Parameter 1860 acts as the machine's memory for when using absolute pulse coders (APC). Unlike incremental encoders, which must hit a "limit switch" or "dog" every time the machine starts up, absolute encoders always know their position. fanuc parameter 1860 work
Fanuc controls often split override limits into two parameters based on the cutting mode: To edit it, you must be in MDI
: Most machines use "Automatic Setting" (set via Parameter 1902), where the system detects the amplifiers in order. The Role of 1860 To edit it