Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 51)

Rockwell Automation Publication 750-RM002B-EN-P - September 2013 51
Drive Configuration Chapter 1
P375 [Bus Reg Level]
Bus Regulation Level - Sets the turn-on bus voltage level for the bus voltage
regulator and the dynamic brake.
Table 5 - Turn On Bus Voltage
While the following parameters are listed and editable in the drive, they typically
do not need to be adjusted in any way. Take care when adjusting because
undesired operation can occur in another aspect of motor control.
P376 [Bus Limit Kp]
Bus Limit Proportional Gain - Enables a progressively faster decel when the drive
is behind the programmed decel time by making the bus limiter more responsive.
A higher value means the drive tries to decrease decel time.
This parameter is valid only in NON-Flux Vector modes.
P377 [Bus Limit Kd]
Bus Limit Derivative Gain - Lets you force the bus limit sooner. The higher the
value the quicker the bus limit is hit and regulation starts. This can cause
regulation below the typical setpoint (750VDC for 460V drive). Too high a
value and normal operation of the motor can be affected. (60…60.5 Hz
oscillation.)
This parameter is valid only in NON-Flux Vector modes.
P378 [Bus Limit ACR Ki]
Bus Limit Active Current Regulator Integral Gain - If you find your system
makes the regulator unstable or oscillatory, a lower value in this parameter settles
out the oscillations.
This parameter is valid only in NON-Flux Vector modes.
P379 [Bus Limit ACR Kp]
Bus Limit Active Current Regulator Proportional Gain - Determines the
responsiveness of the active current and therefore, regenerated power and bus
voltage. Raising this value can cause the output frequency (when in bus limit) to
become noisy or jittery. Too low a value can cause the bus limit function to
malfunction and result in a over voltage fault.
This parameter is valid only in NON-Flux Vector modes.
P380 [Bus Reg Ki]
Bus Regulator Integral Gain - When regulating the DC bus, the voltage tends to
swing above and below the voltage setpoint in what looks like a ringing
oscillation. This parameter affects that behavior. A lower the value reduces
oscillation.
This parameter is valid only in Flux Vector modes.
P20 [Rated Volts] = Default Turn On Volts = Min/Max Setting =
< 252V 375V 375V / 389V
252…503V 750V 750 / 779V
504…629V 937V 937 / 974V
> 629V 1076V 1076 / 1118V