Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 445)

Power-up G-code Parameters
Chapter 19
19-13
Function
Use this parameter to select the default G-code for modal group 10. You
can use this parameter for lathe/mill applications only; however, this
parameter is not active on lathe A.
The selected G-code specifies whether the control operates under G98 Init
Level Return or under G99 R Point Level Return at power-up or reset.
Lathe
A
Lathe
B
Lathe
C
Mill
Control
Active Mode
------ G98 G98 G98 Init Level Return
------ G99 G99 G99 R Point Level Return
Axis Parameter Number
Single Process Process 1 Process 2
All [530] [20530] [21530]
Range
Selection Result
(a) Init Level Return
(b) R Point Level Return
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.
19.12
PTO G-code for
Modal Group 10