LEESON SM-Plus Series Sub-Micro Inverters - Manual (Page 43)

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P22 DC BRAKE VOLTAGE
This sets the magnitude of the DC braking voltage, in percentage of the nominal DC Bus voltage
(DC Bus = input AC voltage X 1.414). The point at which the DC braking is activated depends on the
selected STOP METHOD (Parameter 04):
IF COAST WITH DC BRAKE is selected, the DC braking is activated after a time delay of up to 2
seconds, depending on the output frequency at the time of the STOP command. In this case, the DC
braking is the only force acting to decelerate the load.
IF RAMP WITH DC BRAKE is selected, braking is activated when the output frequency reaches 0.2
Hz. In this case, the drive decelerates the load to a near stop and the DC braking is used to bring the load
to a final stop.
P23 MINIMUM FREQUENCY
This sets the minimum output frequency of the drive for all speed reference sources except the PRESET
SPEEDS (Parameters 31-37).
When using a 0-10 VDC or 4-20 mA analog speed reference signal, this parameter also sets the drive
speed that corresponds to the minimum analog input (0 VDC or 4 mA).
NOTE: If this parameter is changed while the drive is running, the new value will not take effect until
the drive is stopped.
P24 MAXIMUM FREQUENCY
This sets the maximum output frequency of the drive for all speed reference sources, and is used with
MINIMUM FREQUENCY (Parameter 23) to define the operating range of the drive.
When using a 0-10 VDC or 4-20 mA analog speed reference signal, this parameter also sets the drive
speed that corresponds to the maximum analog input (10 VDC or 20 mA).
NOTE 1: On drives equipped with the High Output Frequency option, this parameter can be set up to
999.9 Hz.
NOTE 2: If this parameter is changed while the drive is running, the new value will not take effect until
the drive is stopped.
P25 CURRENT LIMIT
This sets the maximum allowable output current of the drive. The maximum setting is either 180% or
150%, depending on whether LINE VOLTAGE SELECTION (Parameter 01) is set to HIGH or LOW.
The drive will enter current limit when the load demands more current than the CURRENT LIMIT
setting. When this happens, the drive will reduce the output frequency in an attempt to reduce the
output current. When the overload condition passes, the drive will accelerate the motor back up to the
speed setpoint.