Rockwell Automation Allen-Bradley PowerFlex 755T Flux Vector Tuning User Manual

18 Rockwell Automation Publication 750-AT006D-EN-P - January 2022
Chapter 1 Background
System C/U Select
10:905 [System C/U Select] allows either calculated or user-entered parameters to be applied to controller gains and filter bandwidths. It
also allows you to transfer calculated parameter values to user-entered parameter values so you can use them as a starting point for manual
tuning if desired. Table 2 lists the parameters that are applied to the controller when 10:905 [System C/U Select] = Calculated.
These parameters are auto-calculated as a function of 10:906 [System BW], 10:907 [System Damping], 10:901 [Load Ratio], and
10:902 [Load Coupling] during out-of-box and autotune calculations. You can also manually increase or decrease system bandwidth to
automatically adjust these parameters so that a single parameter, 10:906 [System BW], can be used to proportionally adjust all of these
control loop parameters.
Table 3
lists the parameters that are applied to the controller when 10:905 [System C/U Select] = User Entered.
This selection allows you to enter values for these parameters directly. Figure 16 on page 19
shows how various parameters impact the
System C/U Selection. Autotune updates the parameters in red, which then triggers the automatic calculations upon any change of their
input parameters.
Table 2 - 10:905 [System C/U Select] = Calculated Parameters
Bandwidth Abbreviation Parameter No. Parameter Name Description Units
K
PP
10:1754 [c PReg Kp] Position Loop Bandwidth Hz
K
PI
10:1756 [c PReg Ki] Position Integrator Bandwidth Hz
K
VP
10:1955 [c VReg Kp] Velocity Loop Bandwidth Hz
K
VI
10:1957 [c VReg Ki] Velocity Integrator Bandwidth Hz
K
OP
10:2021 [c LdObs Kp] Load Observer Bandwidth Hz
K
OI
10:2023 [c LdObs Ki] Load Observer Integrator Bandwidth Hz
K
VFF
10:1760 [c Vel FF Gain] Velocity Feed Forward Gain %
K
AFF
10:1973 [c Accel FF Gain] Acceleration Feed Forward Gain %
— 10:2154 [c Trq LPF BW] Torque Low Pass Filter Bandwidth Hz
— 10:1002 [c VelFb LPF BW] Velocity Feedback Low Pass Filter Bandwidth Hz
— 10:1004 [c Vel Fb LPF Gn] Velocity Feedback Low Pass Filter Gain —
— 10:1008 [c AltVelFbLPF BW] Alternate Velocity Feedback Low Pass Filter Bandwidth Hz
— 10:1021 [c AltVelFBLPF Gn] Alternate Velocity Feedback Low Pass Filter Gain —
— 10:1928 [c Vel Comp Gain] Velocity Compensation Gain —
Table 3 - 10:905 [System C/U Select] = User Entered
Bandwidth Abbreviation Parameter No. Parameter Name Description Units
K
PP
10:1755 [u PReg Kp] Position Loop Bandwidth Hz
K
PI
10:1757 [u PReg Ki] Position Integrator Bandwidth Hz
K
VP
10:1956 [u VReg Kp] Velocity Loop Bandwidth Hz
K
VI
10:1958 [u VReg Ki] Velocity Integrator Bandwidth Hz
K
OP
10:2022 [u LdObs Kp] Load Observer Bandwidth Hz
K
OI
10:2024 [u LdObs Ki] Load Observer Integrator Bandwidth Hz
K
VFF
10:1761 [u Vel FF Gain] Velocity Feed Forward Gain %
K
AFF
10:1974 [u Accel FF Gain] Acceleration Feed Forward Gain %
— 10:2155 [u Trq LPF BW] Torque Low Pass Filter Bandwidth Hz
— 10:1003 [u VelFb LPF BW] Velocity Feedback Low Pass Filter Bandwidth Hz
— 10:1005 [u Vel Fb LPF Gn] Velocity Feedback Low Pass Filter Gain —
— 10:1009 [u AltVelFbLPF BW] Alternate Velocity Feedback Low Pass Filter Bandwidth Hz
— 10:1022 [u AltVelFBLPF Gn] Alternate Velocity Feedback Low Pass Filter Gain —
— 10:1929 [u Vel Comp Gain] Velocity Compensation Gain —

Rockwell Automation Allen-Bradley PowerFlex 755T Flux Vector Tuning Specifications

General

Brand	Rockwell Automation
Model	Allen-Bradley PowerFlex 755T Flux Vector Tuning
Category	Industrial Equipment
Language	English