150
It is used to select the action mode of the cooling fan. When 0 is selected, the fan runs in the running state of the
inverter. When the radiator temperature is higher than 40 ℃ , the fan runs. When the radiator temperature is
lower than 40 ℃, the fan does not run.
When it is selected as 1, the fan will run after power on.
The droop rate allows a small speed difference between the master station and the slave station, thus avoiding
conflicts between them. The default value for this parameter is 0.
Only when the master and slave adopt the speed control mode, the droop rate needs to be adjusted. For each
transmission process, the appropriate droop rate needs to be gradually found in practice. It is suggested that the
PC-49 should not be set too large, otherwise the steady-state speed will drop obviously when the load is large.
The droop rate must be set for both the master and slave.
Droop speed = Synchronization frequency× output torque × droop rate ÷ 10
Eg.: PC-49 = 1.00, Synchronization frequency=50Hz, output torque=50%, then
Droop speed = 50Hz×50%×1.00÷10=2.5Hz
VFD actual frequency = 50Hz – 2.5Hz = 47.5Hz
Terminal jog run priority
This parameter is used to set whether the terminal jog function has the highest priority.
When the terminal jog priority is effective, if the terminal jog command appears in the operation process, the
inverter will switch to the terminal jog operation state.
SVC optimization selection
1: Optimization mode 1
2: Optimization mode 2
The SVC optimization mode of asynchronous motor, it does not need to be adjusted generally.
Dead area compensation mode
0: No compensation
1: Compensation mode 1
0: Asynchronous Modulation
1: Synchronous modulation
It is only effective for VF control.
Synchronous modulation means that the carrier frequency changes linearly with the output frequency
transformation to ensure that the ratio (carrier wave ratio) remains unchanged. It is generally used when the
output frequency is higher, which is conducive to the quality of output voltage. When the output frequency is
lower (below 100Hz), generally synchronous modulation is not needed, because the ratio of carrier frequency to
output frequency is higher, and the advantage of asynchronous modulation is more obvious.
When the operating frequency is higher than 85Hz, the synchronous modulation will take effect, and the
asynchronous modulation mode is adopted below this frequency.
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