Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 347)

Overtravels and Programmable Zones
Chapter 12
12-9
Figure 12.7
Programmable Zone 3 Zero Point (Machine Coordinate System)
Programmable Zone 3
if enabled when tool
is outside of this area
Programmable Zone 3
if enabled when tool
is inside of this area
Software
overtravel
Programmable zone 3 becomes active when either the G22 or G22.1 code
is executed. It is made inactive when the G23 or G23.1 code is executed.
Important: You must home your axes first before the control will enable
the programmable zones.
Program
G-code:
To turn on
these zones:
To turn off
these zones:
G22 2 and 3 not applicable
G22.1 3 2
G23 not applicable 2 and 3
G23.1 not applicable 3
G22.1 and G23.1 are modal (G22.1 cancels G23.1 and G23.1 cancels
G22.1). G22 and G23 belong to a different modal group than G22.1 and
G23.1. This means that programmable zone 2 may be activated without
activating programmable zone 3 if a G23.1 is executed.
G23 is automatically active at power up, control reset, or E-STOP reset as
the default G code for this modal group.
Your system installer can also turn zones on and off with PAL. Refer to
your system installer’s documentation for more information.