MD280/MD280N User Manual Parameter Description
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2: Track downward from the maximum frequency, which is generally used
for power generating load.
Rotation velocity tracking
fastness and slowness
Factory
default
value
20
F4-02
Setup range 1 to 100
When it is in the mode of rotation speed tracking startup, it is used select
the fastness and slowness of tracking the rotation speed. The higher the
parameter value is, the faster the tracking velocity is, but too higher value
may cause unreliable tracking.
Startup frequency
Factory
default value
0.00Hz
F4-03
Setup range
0.00Hz to maximum frequency
˄F0-04˅
Startup frequency
retention time
Factory
default value
0.0s
F4-04
Setup range 0.0s to 36.0s
To ensure the torque at the time of startup proper startup frequency shall
be set. In addition, in order to set up magnetic flux when waiting for the
startup of the motor, the startup frequency shall remain for a certain period
of time before accelerating to the setup frequency, as shown in Fig.6-10.
If the frequency reference value (frequency source) is lower than the
startup frequency, the inverter cannot start and will be in standby status.
Example 1:
F0-01=0 means the frequency source is digital reference.
F0-03˙10.00Hz means the digital setup frequency is 10.00Hz.
F4-03˙5.00Hz means the startup frequency is 5.00Hz.
F4-04˙2.0s means that the startup frequency retention time is 2.0s.
In this case, the inverter will be in the standby status and its output
frequency is 0Hz.
Example 2:
F0-01=0 means the frequency source is digital reference.
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