Rockwell Automation Publication 2198-UM002E-EN-P - February 2018
357
Motor Control Feature Support
Appendix D
Table 162 - Ramp Attributes
Figure 183 - Ramp Attribute Sample Code
Ramp Attribute
Access
ID
Description
RampVelocity - Positive
Set
374
Ramp Velocity - Positive attribute is a positive value that defines the maximum positive velocity command
output of the Ramp Generator.
RampVelocity - Negative
Set
375
Ramp Velocity - Negative attribute is a negative value that defines the maximum negative velocity command
output of the Ramp Generator.
RampAcceleration
Set
376
The Ramp Acceleration attribute is a positive value that defines the maximum acceleration (increasing speed)
of the velocity command output by the Ramp Generator.
RampDeceleration
Set
377
The Ramp Deceleration attribute is a positive value that defines the maximum deceleration (decreasing
speed) of the velocity command output by the Ramp Generator.
RampJerk - Control
Set
379
The Ramp Jerk Control attribute sets the percentage of acceleration or deceleration time that is applied to the
speed ramp as jerk limited S-Curve based on a step change in velocity. The S-Curve time is added half at the
beginning and half at the end of the ramp. A value of 0 results in no S-Curve, for example, a linear
acceleration or deceleration ramp. A value of 100% results in a triangular acceleration profile with the peak
being the configured ramp acceleration or deceleration. As the Jerk Control value increases, the derived
accelerating jerk value decreases based on the following: 0.5 • 0.01 • Jerk Control • Ramp Vel Positive/Ramp
Accel The decelerating Jerk limit value also decreases according to the following: 0.5 • 0.01 • Jerk Control •
Ramp Vel Negative/Ramp Decel.
IMPORTANT
The Ramp attributes are can only be viewed and set with an SSV or GSV
instruction.