HV350 Mini Frequency Inverter User Manual
61
P2.31 Zero frequency threshold
Setting range: 0~400.0Hz
P2.32 Zero frequency hysteresis
Setting range: 0~400.0Hz
The above two parameters are to set zero frequency hysteresis control.
Take analog input AI1 for example, see Fig.6-10:
Startup process:
When the Run command is issued, only afterAI1 voltage arrives or exceeds VS-b, does the
drive start and accelerate to the preset frequency in defined Acc time.
Stop process:
During Dec process, when AI1 voltage reduces to VS-b, the drive will not stop until it
reaches VS-a and the corresponding frequency becomes fa, where fa is the threshold of zero
frequency defined by P2.31, and fb, fa is defined by P2.32.
This function can realize dormancy to save energy, in this way, frequent start and stop at
threshold frequency can be avoided.
AI1 Input voltage
FWD
VS-b
VS-a
Vmin
Fmin
Fmax
Operating
frequency
Output
frequency
Setting
frequency
Fa
Fb
0
fa: Zero frequency threshold
fb: fa + Zero frequency hysteresis
Fig. 6-10 Zero Frequency Hysteresis
P2.33 Droop control
Setting range
：
0.00
～
10.00Hz
When several inverter drives one load, the load of indivial inverter is different due to speed
difference. The inverter with higher speed drives more load. This parameter can decrease the speed
when the load is increased and equalizes the load of inverters.
P3 Motor parameters
P3.00 Motor rated power
Setting range:0.4
～
999.9kW
