INVT Goodrive270 Series Operation Manual page 165

Goodrive270 series VFD for fan and pump
Function
Name
code
Braking current
P01.03
before start
Braking time before
P01.04
start
P01.05 ACC/DEC mode
Description
Setting a proper starting frequency can increase
the torque during VFD start. During the hold time
of the starting frequency, the output frequency of
the VFD is the starting frequency. And then, the
VFD runs from the starting frequency to the set
frequency. If the set frequency is lower than the
starting frequency, the VFD stops running and
keeps in the standby state. The starting
frequency is not limited in the lower limit
frequency.
Setting range: 0.0–50.0s
The VFD performs DC braking with the braking
current before start and it speeds up after the
DC braking time. If the set DC braking time is 0,
DC braking is invalid.
Stronger braking current indicates larger braking
power. The DC braking current before start is a
percentage of the VFD rated current.
P01.03 setting range: 0.0–100.0%
P01.04 setting range: 0.00–50.00s
Used to indicate the changing mode of the
frequency during start and running.
0: Linear type. The output frequency increases
or decreases linearly.
Output frequency f
fmax
t1
1: S curve. The output frequency increases or
decreases according to the S curve.
The S curve is generally applied to elevators,
conveyors, and other application scenarios
where smoother start or stop is required.
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Function parameter list
Time t
t2
Default Modify
◎
0.0%
◎
0.00s
◎
0