Senlan Hope800 Series Manual page 70

6 Parameter Description
because of the wind). In such a case, the motor can be stopped by DC braking and then restarts, thus
preventing the overcurrent impact at the start. Refer to F1-23 and F1-24.
F1-19＝2: The speed and the direction of the motor is searched automatically before the motor starts,
then the motor starts smoothly from the searched speed. This starting mode shortens the starting time and
reduces the impact at the start.
For restarts following the momentary stop, auto reset or operation interruption, parameter Fb-25 can
make the motor start from the searched speed compulsively. If V/F control with PG or Vector control
with PG is selected, restart from the searched speed is not needed.
DC braking at start and stop is illustrated as below.
Output frequency
Stop/DC braking frequency
Starting frequency
Output current
DC braking current(at stop)
DC braking current(at start)
Caution: For high-speed or large-inertia loads, it is recommended to adopt "starts from searched speed"
instead of "starts from starting frequency after DC braking".
Caution: Starting from the starting frequency immediately after a coast stop will cause overcurrent. Therefore
if an immediate start is needed when the motor doesn't stop turning after the coast stop, it is
recommended to adopt "starts from searched speed".
If F1-22=1 when the starting mode is "starts from starting frequency" and F1-21 is not equal to zero,
the output voltage will rise gradually from zero to the value which corresponds to the starting
frequency within the time period set by F1-21. This helps reduce the impact at the start and prevent
undirectional rotation due to voltage surge. The function is only valid for V/F control without PG.
F1-25
Setting 0: Slowdown stop
range 2: Slowdown+DC braking
F1-26
Setting
0.00~60.00Hz
range
F1-27 DC braking waiting time(at stop)
Setting
0.00~10.00s
range
F1-28
Setting
0.0~60.0s. It's also used as the holding bake delay time.
range
F1-29
Setting
0.0~100.0％(inverter rated current=100%)
range
F1-30
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DC braking
time(at start)
Stop mode
DC braking frequency(at stop)
DC braking time(at stop)
DC braking current(at stop)
Zero-speed delay time
DC braking waiting
time(at stop)
Default
1: Coast stop
3: Slowdown+holding brake delay
Default
Default
Default
Default
Default
Time
Time
DC braking
time(at stop)
0 Change
0.50Hz Change
0.00s Change
0.0s Change
0.0% Change
0.0s Change
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