Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 328)

Constant Surface Speed
Chapter 11
11-6
Function
This parameter is used only for Grinder control types. This parameter
specifies the time units for constant surface speed (CSS). You can choose
between:
seconds, i.e., feet/second or meters/second
minutes, i.e., feet/minute or meters/minute
This parameter selects only the default units for CSS; the programmer can
still alter the units for CSS by programming an L-word in the G96 block.
Refer to your programming and operation manual for details.
Axis Parameter
Number
All [14]
Range
Selection Result
(a) Per Second
(b) Per Minute
Notes
This is a global parameter; the value set here applies to all axes.
Any changes that occur as a result of constant surface speed are delayed
while the spindles attempt to synchronize, until synchronization is
achieved. For more information about synchronized spindles, refer to your
operation and programming manual.
END OF CHAPTER
11.5
Per Minute -or- Per Second
11.6
Using Synchronized
Spindles with CSS