Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 416)

Letter Format Parameters
Chapter 17
17-18
Function
This parameter is used for mill and surface grinder controls only. It refers
to the R-word that is used when programming a coordinate system rotation
(G68). This R-word specifies the angle of rotation (entered in units of
degrees) at which the coordinate system is to be rotated.
This parameter specifies the maximum number of digits that are permitted
to the left and to the right of the decimal point in the R-word format.
Parameter Parameter
Number
R: Angle Word Format [489]
Range
Selection Result
(a) 3.1 degrees
(b) 3.2 degrees
(c) 3.3 degrees
(d) 3.4 degrees
Notes
This parameter is a global parameter; it applies to all axes.
Part rotation cannot be performed if the reciprocation axis is in the
currently active phase.
17.24
R: Angle Word Format