Lenze SL - Manual (Page 41)

Lenze 13466147 EDBSM01 v19 EN 41
Commissioning 4
P20 DECELERATION TIME
P20 sets the deceleration rate for all of the speed reference sources (keypad, speed pot, jog, MOP,
and preset speeds). This setting is the time to decelerate from BASE FREQUENCY to 0 Hz. If the drive
is set for COAST TO STOP (setting 01 or 02 in Parameter 04), this parameter will have no effect when
a STOP command is given.
P21 DC BRAKE TIME
P21 sets the length of time that the DC braking voltage is applied to the motor. The DC BRAKE TIME
should be set to the lowest value that provides satisfactory operation in order to minimize motor
heating.
P22 DC BRAKE VOLTAGE
P22 sets the magnitude of the DC braking voltage, in percentage of the line voltage. The point at
which the DC braking is activated depends on the selected STOP METHOD (Parameter 04):
If COAST WITH DC BRAKE is selected, 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 then DC braking is used to bring the
load to a final stop.
P23 MINIMUM FREQUENCY
P23 sets the minimum output frequency of the drive for all speed reference sources except the PRESET
SPEEDS (Parameters 31-37), and is used with MAXIMUM FREQUENCY (Parameter 24) to define the
operating range of the drive.
When using an analog input speed reference (0-10 VDC or 4-20 mA), Parameters 45 and 46 (SPEED
AT MIN SIGNAL and SPEED AT MAX SIGNAL) also affect the drive's speed range.
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
P24 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 an analog input speed reference (0-10 VDC or 4-20 mA), Parameters 45 and 46 (SPEED AT
MIN SIGNAL and SPEED AT MAX SIGNAL) also affect the drive's speed range.
NOTE
If this parameter is changed while the drive is running, the new value will not take effect
until the drive is stopped.