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Chapter 2
Behavior models used in CIP Motion
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Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
Open Loop Frequency Control model
Associated with drives that do not have a current control loop and typically drive
an induction motor, also known as Volts/Hertz or Variable Frequency Drives
(VFDs). The following diagram provides an overview of this method.
See also
The Closed Loop Velocity Control method is targeted for applications that
require tight speed regulation. The command input to the velocity loop can be
derived directly from the Velocity Command of the Command Generator when
configured for Velocity Control Mode or from the Position Loop Output when
configured for Position Control Mode.
When serving as an outer velocity loop in Velocity Control Mode, the device
applies the Velocity Command input to the velocity command summing junction
to generate the Velocity Reference signal into a PI regulator. Contributing to the
velocity command summing junction also is the Velocity Trim input, which can
Closed Loop Velocity Control