Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 300)

Acc/Dec Parameters
Chapter 10
10-4
Figure 10.1
Exponential Acc/Dec
Time constant defined by the parameters
MANUAL or PROGRAMMED DELAY CONSTANT
Time (seconds)
0
63% of commanded
change in speed
EXPONENTIAL
Deceleration
EXPONENTIAL
Acceleration Commanded
Feedrate
Feedrate
Important: Rapid moves that are made for a lathe control type when
performing a compound turning routine do not use this parameter. Rapid
moves for compound turning routines always use exponential Acc/Dec
regardless of the setting of this parameter. Be aware that if you choose
linear Acc/Dec for this parameter, and if you are going to use compound
turning routines, you must still configure the axes to allow rapid moves in
exponential Acc/Dec. This requires that the setting of the parameter for
the Programmed Delay Constant must be valid with the feedrate chosen as
the rapid feedrate for each axis. If improperly configured, the control may
generate a SERVO AMPLIFIER FAULT error when a rapid move is
executed in a compound turning routine.
Linear or S--Curve Acc/Dec as Per G--Code -- Use this parameter to
select the type of acc/dec mode (Linear or S--Curve) you want to
perform. Activating G47 enables Linear Acc/Dec. Activating G47.1
enables S--Curve Acc/Dec. S--Curve Acc/Dec is only applicable to
positioning moves in Exact Stop mode.