SM01P 38
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.
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