Copley Controls Xenus Plus Series User Manual page 19

Xenus Plus User Guide
Basic Attributes of All Control Loops
These loops (and servo control loops in general) share several common attributes:
Loop Attribute Description
Every loop is given a value to which it will attempt to control. For example, the velocity loop
Command input
receives a velocity command that is the desired motor speed.
Limits Limits are set on each loop to protect the motor and/or mechanical system.
The nature of servo control loops is that they receive feedback from the device they are
Feedback
controlling. For example, the position loop uses the actual motor position as feedback.
These are constant values that are used in the mathematical equation of the servo loop. The
Gains values of these gains can be adjusted during drive setup to improve the loop
performance. Adjusting these values is often referred to as tuning the loop.
The loop generates a control signal. This signal can be used as the command signal to another
Output
control loop or the input to a power drive.
Copley Controls
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