Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 448)

Power-up G-code Parameters
Chapter 19
19-16
Function
Use this parameter to select the default G-code for modal group 20. You
can use this parameter for lathe/mill applications.
The selected G-code specifies whether the control operates under G39
Cutter Comp Linear or G39.1 Cutter Comp Rounding at power-up or reset.
Lathe
A
Lathe
B
Lathe
C
Mill
Control
Active Mode
G39 G39 G39 G39 Cutter Comp Linear
G39.1 G39.1 G39.1 G39.1 Cutter Comp Rounding
Axis Parameter Number
Single Process Process 1 Process 2
All [519] [20519] [21519]
Range
Selection Result
(a) G39 (Cutter Comp Linear)
(b) G39.1 (Cutter Comp Rounding)
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 parameter applies to all of the axes assigned to that process.
19.15
PTO G-code for
Modal Group 20