Emerson Epsilon Eb Series Reference Manual page 50

If the Velocity Command Preset is not equal to the Target Velocity, an acceleration (or
deceleration) ramp is in progress. In this state, the Velocity Command Preset will be increased
(or decreased) based upon the acceleration (or deceleration) ramp rate of the selected velocity
preset. During the acceleration/deceleration ramp, the At Velocity output function is inactive.
If the Velocity Command Preset is equal to the Target Velocity, all ramping is complete, the
Velocity Command Preset is constant and the At Velocity output function is active.
The Velocity Command is always equal to the Velocity Command Preset in Presets
submode.
Figure 26: Velocity vs. Time Diagram using Preset Velocities
Summation Submode
In Summation submode the Velocity Command is the result of the sum of the Velocity
Command Analog and the Velocity Command Preset values.:
= +
VC AC PC
Where:
VC = Velocity Command
AC = Velocity Command Analog
PC = Velocity Command Preset
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Operational Overview
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