Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 313)

Acc/Dec Parameters
Chapter 10
10-17
After .16 seconds (one time constant), the axis has decelerated from 200
ipm to 137 ipm. After .32 seconds, the axis has decelerated to 114 ipm.
Figure 10.9
Exponential Deceleration Example
0 .16 .32 .48 .64 .80 Time (seconds)
200
137
114
100
Feedrate
Initial
feedrate
EXPONENTIAL
Deceleration
Commanded
feedrate
0
Function
This parameter determines the total acceleration or deceleration time
whenever Exponential Acc/Dec is being used during positioning moves.
This includes MDI moves and programmed moves executed when G00
mode is active.
This parameter is significant only when the parameter Positioning
Acc/Dec Mode is set for “Exponential.”
10.9
Programmed Delay
Constant