VD120 Series Inverter User Manual Parameter Description
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F1 Start/Stop Control Group
F1-00
Start Mode
0: Direct start
1: Speed tracking restart
2: Pre excitation start (AC asynchronous )
0
○
0: direct start
If start dc braking time is set to 0, the frequency inverter starting run from start frequency.
If start dc braking time is not zero, the dc braking first, and then starting run from start frequency.
Apply the occasion that have small inertia load, motor may be turning at starting.
1: speed tracking restart
Frequency inverter judgment for motor speed and direction first, and to track the frequency of the
motor starting, smooth and no impact on the implementation of the rotating motor startup. Applicable
to large inertia of the instantaneous power failure to start again. In order to guarantee the
performance of speed tracking restart, motor F2 group parameters should be accurately set.
2: asynchronous motor pre-excitation start
Only valid for asynchronous motor, used to build magnetic field in motor running before.
Pre excitation current, pre exciting time see the description of function code F1-03, F1-04.
If pre excitation time is set to 0, the frequency inverter to cancel the excitation process, from start
frequency to start. Pre excitation time is not zero, the first pre excitation restart, can improve the motor
dynamic response performance.
F1-01
Starting Frequency
0.00Hz~10.00Hz
0.50Hz
○
F1-02
Startup Frequency
Holding Time
0.00s~100.0s
0.0s
◎
In order to ensure the motor torque of startup, please set the right start frequency. In order to make
fully establish flux when the motor start, need to start the frequency to keep a certain time.
Start frequency F1-01 without being limited by the lower limit frequency. But when goal setting
frequency is less than the start frequency, frequency inverter is not started in the standby state.
In the process of positive & negative switching, start frequency holding time doesn’t work.
Start frequency holding time is not included in the acceleration / deceleration time, but in the simple
PLC running time.
For example 1:
F0-02=0 Frequency source is digital given
F0-09=2.00Hz Digital set frequency is 2.00Hz
F1-01=5.00Hz Start frequency is 5.00Hz
F1-02=2.0s Start frequency holding time is 2.0s
At this point, the inverter will be in standby state, the inverter output frequency is 0.00Hz.
For example 2:
F0-02=0 Frequency source is digital given
F0-09=10.00Hz Digital set frequency is 10.00Hz
F1-01=5.00Hz Start frequency is 5.00Hz
F1-02=2.0s Start frequency holding time is 2.0s
At this point, the inverter accelerate to 5.00Hz for 2.0s, then accelerated to given frequency 10.00Hz.
Summary of Contents for VD120 Series
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