Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 417)

Letter Format Parameters
Chapter 17
17-19
The S-word letter format parameters are covered on these pages:
Parameter: Page:
S: CSS Word Format 17-19
S: Orient Angle Word Format 17-20
S: Spindle RPM Word Format 17-21
Function
This parameter specifies the format of the S-word that is used to program a
cutting speed in units of feet/minute or meters/minute, and for grinders,
feet/second or meters/second. An S-word programs a cutting speed when
the constant surface speed feature (CSS) is active. This parameter
specifies the maximum number of digits that are permitted to the left and
to the right of the decimal point in the S-word format.
Parameter Parameter
Number
S: CSS Word Format [492]
Range
Selection Result for mill/lathe Result for grinder
(a) 4.2 ft/min 3.3 meters/min 4.2 ft/time 3.3 meters/time
(b) 3.2 ft/min 2.3 meters/min 3.2 ft/time 2.3 meters/time
(c) 4.1 ft/min 3.2 meters/min 4.1 ft/time 3.2 meters/time
(d) 3.1 ft/min 2.2 meters/min 3.1 ft/time 2.2 meters/time
Notes
This parameter is a global parameter; it applies to all axes and processes.
On grinder controls, the operator can choose between programming in time
units of minutes or seconds. Refer to your programming and operation
manual for details.
This parameter sets only the number of digits to the left and to the right of
the decimal point.
17.25
S-Word Letter Formats
17.26
S: CSS Word Format