Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 438)

Power-up G-code Parameters
Chapter 19
19-6
Function
This parameter selects the default G-code for modal group 2. The selected
G-code (G17, G18, G19) specifies the primary machining plane of the
control at power-up or reset.
Axis Number Control Type
All [522] Mill
Surface Grinder
[564] Lathe
Cylindrical Grinder
[20522] Dual Mill Process 1
[21522] Dual Mill Process 2
[20564] Dual Lathe Process 1
[21564] Dual Lathe Process 2
Range
Selection Result
(a) G17
(b) G18
(c) G19
Notes
This is a global parameter. The value set here applies to all axes.
For dual--processing controls, this is a per process parameter. The value set
in the parameters applies to all of the axes assigned to that process.
19.5
PTO Plane Select G-code