Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 289)

Feedrate Parameters
Chapter 9
9-7
Function
Enter the feedrate at which all axes decelerate to when an external
deceleration request is sent to PAL during a cutting move (G01, G02,
G03 active).
This feature requires coordination with the PAL program and is usually set
up to operate as follow:
An axis travel switch is placed at a point where you want to slow down
axis travel. Usually this is somewhere near the hardware overtravel.
When the switch is tripped, the PAL flag “External Deceleration Request”
is set TRUE, and the control decelerates all axes to the feedrate entered for
this parameter.
As long as the PAL flag remains TRUE, all axis motion in any direction
will be restricted to the feedrate entered here. Refer to your PAL reference
manual for more information.
Jogging moves are not affected by this parameter.
This is not a per-axis parameter. The speed selected here is applied to
all axes.
Axis Parameter Number
Single Process Process 1 Process 2
All [408] [20408] [21408]
Range
0.00000 to 10160.00004 mmpm
or
0.00000 to 400.00000 ipm
Notes
This is a global parameter. The value set here applies to all axes.
For Dual Processing controls, this is a per process parameter. The value set
in the parameters applies to all of the axes assigned to that process.
9.2.3
External Decel Speed
(Cutting)