Vacon NX Series Applications Manual page 293

PARAMETER DESCRIPTIONS VACON · 293
This parameter has no effect if the selected stop function (ID506) is Coasting. The zero speed
time starts when the ramp time is expected to reach zero speed. See Chapter 9.8 Closed loop
parameters (IDs 612 to 621).
617 CL: CURRENT CONTROL P GAIN 6 (2.6.23.17)
Use this parameter to adjust the P-gain of the current controller.
This controller is active only in closed loop control mode. The controller generates the
voltage vector reference to the modulator. See Chapter 9.8 Closed loop parameters (IDs 612 to
621).
618 CL: ENCODER FILTER TIME 6 (2.6.23.15)
Use this parameter to set the filtering time for the speed measurement.
The parameter can be used to eliminate encoder signal noise. Too high a filter time reduces
speed control stability. See Chapter 9.8 Closed loop parameters (IDs 612 to 621).
619 CL: SLIP ADJUST 6 (2.6.23.6)
Use this parameter to adjust the voltage of the motor when the motor is loaded.
The motor name plate speed is used to calculate the nominal slip. This value is used to
adjust the voltage of motor when loaded. The name plate speed is sometimes a little
inaccurate and this parameter can therefore be used to trim the slip. Reducing the slip
adjust value increases the motor voltage when the motor is loaded. Value 100% corresponds
to nominal slip at nominal load. See Chapter 9.8 Closed loop parameters (IDs 612 to 621).
620 LOAD DROOPING 23456 (2.6.12, 2.6.15)
Use this parameter to enable the Load Drooping function.
The Load drooping function enables a speed drop. This parameter sets the drooping in
percentage of the nominal torque of the motor.
You can use this function when a balanced load is necessary for mechanically connected
motors.
If the motor has a nominal frequency of 50 Hz, the motor is loaded with the nominal load
(100% of the torque), and Load Drooping is set to 10%, the output frequency is let to decrease
5 Hz from the frequency reference.
621 CL: STARTUP TORQUE 6 (2.6.23.11)
Use this parameter to select the startup torque.
Torque Memory is used in crane applications. Startup Torque FWD/REV can be used in other
applications to help the speed controller. See Chapter 9.8 Closed loop parameters (IDs 612 to
621).
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