User manual

Rockwell Automation Publication MOTION-UM003F-EN-P - March 2015 205
Manual Tune Chapter 9
Additional Tune for the PowerFlex 755 Drive
The Additional Tune section gives you access to additional tuning parameters,
typically needed for more advanced servo loop settings. Additional Tune for the
PowerFlex 755 drive provides access to five parameter tabs:
• Feedforward
• Compensation
• Filters
• Limits
• Planner
The Feedforward tab lets you adjust velocity and acceleration feedforward.
The Compensation tab lets you input scaling gain and friction offset values.
TIP
You may need to turn all your toolbars off to see the complete screen. When
you’re done, choose View>Toolbars>Factory Defaults, or turn on the
toolbars you want to see.
Attribute Description
Velocity Feedforward A command signal that is a scaled version of the command velocity profile.
Acceleration A signal that is a scaled version of the command acceleration profile.
Attribute Description
System Inertia Torque or force scaling gain value that converts commanded acceleration into
equivalent rated torque/force.
Torque Offset Provides a torque bias when performing closed loop control.
Load Observer Configuration Configures the operation of the Load Observer.
Load Observer Bandwidth Determines the proportional gain, Kop, of the load observer.