Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 315)

Acc/Dec Parameters
Chapter 10
10-19
Function
This parameter allows you to select the Acc/Dec type (exponential or
linear) when you are performing manual motion on your control
(e.g., continuous and incremental jogging).
If you select “linear”, the parameter uses ramps AMPed for programmed
moves for each axis. The Acc/Dec motion applies to continuous manual,
continuous PAL axis mover, and incremental manual jogs. For
continuous, the jog feedrate will be accelerated from zero to the requested
feedrate, when the request for a jog is initiated. The jog will start to
decelerate at the AMPed ramp rate when the request to jog is released.
Selecting “Linear” causes your system to always use the downloaded AMP
linear ramp settings, regardless of changes to your part program.
The linear acc/dec ramps for incremental manual jogs will be accelerated
from zero to the requested feedrate when a jog is initiated.
For both continuous and incremental motion, there will be no acc/dec
when an overtravel is hit; all commands will be stopped immediately. It
will still move past the overtravel by the amount of the following error.
Axis Parameter Number
Single Process Process 1 Process 2
All [399] [20399] [21399]
Range
Selection Result
(a) Exponential
(b) Linear
Notes
This is a global parameter; the value set here applies to all axes.
Manual Acc/Dec does not affect acceleration or deceleration during
positioning (G00) or contouring moves (G01, G02, or G03).
10.10
Manual Acc/Dec Mode