Function
5/14/2018 Code
Name
F1.19 Upper torque limit setting
Setting Range
Default
Value
0.0～200.0%(inverter rated current) 150.0%
The setting 100.0% is corresponding to the rated output current.
The function code below（F1.20~F1.24） are valid to V/F control F( 0.00＝1 ), but invalid to vector
control.
Function
Code
Name
F1.20 V/F curve setting
Setting Range
0：Linear V/F curve
1：square torque V/F curve
Default
Value
0
0: Linear V/F curve. It is applicable to constant torque load.
1: 2.0 exponential V/Fc urve. It is applicable to variable torque load, such as blower, pump etc.
Output Voltage (V)
V b
Linear V/F curve
2.0 exponential
V/F curve
Fuling Inve r te r Use r Ma nua l - slide pdf.c om
Output Voltage (V)
V
b
V
boost
f
cut-off
fOb utput Frequency f
Fig. 6-7 Manual torque boost diagram
Function
Code
Name
Setting Range
F1.23 V/F slip compensation limit 0.0～200.0%
Default
Value
100%
Setting this parameter can compens ate the motor speed change produced because of undertaking
loading while on V/F control, to increase the ri gidity of motor mechanical performance. This value
should be set as the motor rated slip frequenc y.
Function
Code
Name
F1.24
Energy Conservation
Selection
Setting Range
0:No Operation
1:EnergyConservation
Default
Value
0
1/3 fb
f b
Output Frequency f
Fig. 6-6 V/F curvediagram
Function
Code
Name
F1.21 Torque boost
F1.22 Torque boost cut-off
Setting Range
0.0%：(auto) 0.1％～30.0％
0.0%～50.0% (relative to motor
rated frequency)
Default
Value
0
20.0%
Torque Boost is mainly applied to less than cut-off frequency (F1.22). The V/F curve after boost is
shown in following figure. Torque booth can improve the low frequency torque performance of V/F control.
Based on the load, a torque should be chosen properly. For heavy load, increase the tor que boost, but
the torque boost should not be set too big, which will resul t in the motor operating at overexcitation and
that it could be overheated, and also the inverter output current is big, reducing efficiency.
When the torque boost is set as 0.0%, the inverter i s at automatic torque boost.
Torque boost cut-off frequency: below this frequency, torque boost is valid, and above this frequency
setting, torque boost is invalid.
When the motor is running in no-load or lower-load during,the inverter can adjust output voltage
by automatically current kf the load。
Note:This function is especially valid for variable torque load (such as fan and pump).
F2 Input and Output Terminal Function Parameters
Function
Code
Name
F2.00 On-off signal filter times
1～10
Setting Range
Default
Value
5
It sets up S1-S6, VI and CI terminals sample filtering time. In big interference situation, this parameter
should be increased in order to prevent mal operation.
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