abc 2000 Series User Manual page 51

too
Note that
the entire control loop. Therefore, when current oscillation or torque
fluctuation is great, manually decrease the proportional gain or
integral gain hare.
P3.18-P3.22 Reserved
Group P4: VIF Control Parameters
The VIF control mode is applicable to low load applications (fan or
pump) or applications where one AC drive operates multiple motors
or there is a large difference between the AC drive power and the
motor power.
V/F curve setting
Setti n g Range
P4.00
0: linear V/F
It is applicable to common constant torque load.
1 : Mu!U-point
VIF
It is applicable to special load such as dehydrator and centrifuge.
Any such V/F curve can be obtained by setting parameters of P4.03
to P4.08.
2: Square VIF
It is applicable lo cenlrifugal loads such as fan and pump.
3 to 8: V/F curve between linear
1 O: VIF complete separation mode
In this mode, the output frequency and output voltage of the AC
drive are independent. The output frequency is determined by the
frequency source, and the output voltage is determined by "Voltage
source for VIF
It is applicable to induction heating, Inverse power supply and
torque motor control.
1 1 : VIF haW separation mode
large current loop Pl gain may lead to oscillation of
0
1
2
3
4
6
8
9
10
1 1
separation" (P4.13).
Default 10
LinearV/F
Multi-point V/F
Square V/F
1.2�power VIF
1.4-power V/F
1.6-powar V/F
1.8-power VIF
Reserved
V/F complete separation
V/F hatf separation
V/F and square V/F