542 Rockwell Automation Publication MOTION-RM002H-EN-P-February 2018
Acceleration and Deceleration Enumerations
The following enumerations are defined for Acceleration and Deceleration Unit
parameters for motion instructions.
Acceleration and Deceleration Unit Parameter Descriptions
Mode Enumerations Compatibility
Time 0 = Units per sec2 Existing Enumeration
1 = % Maximum Existing Enumeration
2 = Reser ved
3 = Seconds
Time based programming
New Enumeration
MDSC 4 = Units per MasterUnit2 New Enumeration
5 = Reser ved
6 = Reser ved
7 = Master Units
Analogous to seconds in time based programming
New Enumeration
The following table shows acceptable combinations of Speed, Acceleration, and
Deceleration units.
Combinations of Speed, Acceleration, and Deceleration Units
Speed Units Acceleration and Deceleration Units
Units per sec2
(Time Driven Mode
Units)
% Maximum
(Time Driven Mode
Units)
Seconds
(Time Driven
Mode
Units)
Units per
MasterUnit2
(Master Driven
Mode Units)
Master
Units
(Master
Driven
Mode Units)
Units per sec
(Time Driven Mode
Units)
Existing Enumeration Existing Enumeration Not
Implemented
Not allowed - Time and Master
Driven Units can not be combined.
% Maximum
(Time Driven Mode
Units)
Existing Enumeration Existing Enumeration Not
Implemented
Seconds
(Time Driven Mode
Units)
Not Implemented Not Implemented New
Enumeration
Units per MasterUnits
(Master Driven Mode
Units)
Not allowed - Time and Master Driven Units cannot be combined. New Enumeration Not
Implemented
Master Units
(Master Drive Mode
Units)
Not Implemented New
Enumeration
These rules must be followed to determine allowable Time and Master Driven
mode when programming Acceleration and Deceleration units: