Chapter 4 - Operation
4-12
4) Sensorless vector control
Set FU2-60 to “Sensorless” to enable Sensorless vector control. It is strongly recommended to perform Auto-
tuning before starting Sensorless control in order to maximize performance.
Parameter Name Code Description
Control method selection FU2-60 Select Sensorless.
P, I gain for sensorless control
FU2-65,
FU2-66
Set gain for Sensorless.
Starting freq FU1-32 Starting freq of the motor
Note) No-load current for Sensorless control is not entered by auto-tuning. Therefore enter the no-load
current value in V/F operation. When other than LS standard motor is used, set this value according to the motor
in use for better performance.
5) Auto-tuning of motor constant
This parameter enables auto-tuning of the motor constants. If FU2-61 is set to Yes and press the enter key, Rs,
Lsigma values begin tuning with the motor stopped. Refer to motor nameplate for the rest of other parameters.
Parameter Name Code Description
Auto-tuning FU2-61 No, Yes
Note) Motor no-load current and slip freq should be set correctly for safe and better performance. Be sure to
check these values and set them properly. Refer to Chapter 5, FU2-40~66 for more.
4.3.2 Advanced function setting
SV-iP5A inverter features advanced function parameters to maximize efficiency and performance of the motor.
It is recommended to use the factory setting unless parameter value change is inevitable.
1) V/F control
Parameter Name Code Description
V/F Pattern FU1-40
Use it according to load characteristics. If User V/F is selected,
user can select the optimum output V/F characteristic for the
application and load characteristics in [FU1-41]~[FU1-48].
Dwell operation
FU2-07
FU2-08
Used to output torque in an intended direction. Inverter stops
acceleration for the preset [FU2-08] Dwell time while running
at Dwell frequency [FU2-07] and starts acceleration at
commanded frequency. Setting [FU2-08] Dwell time to 0
disable the Dwell operation.
Jump Frequency
FU2-10
FU2-11~16
When it is desired to avoid resonance attributable to the natural
frequency of a mechanical system, these parameters allow
resonant frequencies to be jumped. Up to three areas can be set,
with the jump frequencies set to either the top or bottom point
of each area. To enable the function, set [FU2-10] to ‘Yes’ and
set the value in [FU2-11]~[FU2-16].
Accel/Decel pattern
S-curve
FU1-2, 3
FU1-4, 5
This pattern has an effect on the prevention of cargo collapse
on conveyor etc and reduction in an acceleration/ deceleration
shock.
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