Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 408)

Letter Format Parameters
Chapter 17
17-10
Function
This parameter is used for mill and surface grinder controls only.
It corresponds to the H-word used in the G38 hole probing feature. In this
feature, the H-word is used to program the expected diameter of the hole.
This parameter specifies the maximum number of digits that are permitted
to the left and to the right of the decimal point in the H-word format when
programming in inch or metric modes.
Parameter Parameter
Number
H: Word Format [474]
Range
Selection Result
(a) 3.4 inch and 4.3 metric
(b) 3.5 inch and 4.4 metric
(c) 4.3 inch and 5.2 metric
(d) 4.4 inch and 5.3 metric
(e) 5.3 inch and 6.2 metric
(f) 2.3 inch and 3.2 metric
(g) 2.4 inch and 3.3 metric
(h) 2.5 inch and 3.4 metric
(i) 2.6 inch and 3.5 metric
(j) 3.3 inch and 4.2 metric
(k) 4.2 inch and 5.1 metric
(l) 5.2 inch and 6.1 metric
Notes
This parameter is a global parameter; it applies to all axes.
17.12
H: Word Format