Emerson Control Techniques Epsilon Eb Series Reference Manual page 33

Epsilon Eb and EN Drives Reference Manual
Figure 8: 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
Where:
VC = Velocity Command
AC = Velocity Command Analog
PC = Velocity Command Preset
Example 1:
Use of Velocity Presets in a phase advance/retard application. Velocity Preset #0 is set to 0
RPM, Velocity Preset #1 is set to +5 RPM, and Velocity Preset #2 is set to -5 RPM. The
Analog Input is the command source for a web application where a phase adjustment may be
useful. Without interrupting the operation, you may select either Velocity Preset #1 or #2 to
speed up or slow down the motor thereby advancing or retarding the phase between the motor
and the web material.
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PC