NO.6 Detailed Function Description
32
DC braking startup is usually used when load can move under ventilation status for motor will
be in free running status with uncertain direction before inverter outputs voltage. Therefore,
we can execute DC braking before startup and then start the motor to avoid the tripping of
motor.
Parameters will be valid when P025 is set as zero. Refer to P028, P029 and P031 for
relevant parameters.
Figure 6-4 DC Braking Time when Starting Figure 6-5 DC Braking Time when Stopping
P030
Setting range
Unit
Ex-factory value
Alteration
DC braking time when
stopping
0.0-25.0s
0.1s
0.0
╳
When this parameter is set as non-zero, the DC braking when stopping is valid and it will
enter the motor DC braking time. When stopping, DC braking is usually used for
high-position stop or positioning control. When this parameter is zero, DC braking is invalid.
Refer to Figure 6-5 for details.
This parameter is valid when P026 is set as zero. Refer to P026, P028 and P031 for related
descriptions.
P031
Setting range
Unit
Ex-factory value
Alteration
DC braking level
0.0-20.0%
0.1%
2.0
╳
This parameter can be used to set the input motor DC braking voltage when starting and
stopping and adjusted to obtain different braking voltages. The parameter must be adjusted
from small to large slowly until sufficient braking torque is reached, otherwise the motor will
be damaged.
100% voltage shall be used for maximum operation frequency.
P032
Setting range
Unit
Ex-factory value
Alteration
Frequency tracking time
0.1-20.0s
0.1s
5.0
╳
In case of external exception or temporary power failure, this parameter will be set as
frequency tracking time when inverter is executing frequency tracking. In some large inertia
load starting and stopping, restarting after machinery fully stops will waste much time for load
inertia is large. After frequency tracking is enabled, the starting can be executed without
complete stop of machinery. And inverter will conduct frequency tracking form top to down
with set frequency and then continue to accelerate to set frequency after tracking.
