SV-iS7 User Manual - Inverter Drive Supermarket

The following figure illustrates setting the number of automatic restarts at 2.
8.1.21 Operation sound selection
Group Code No. Function Display Setting Display
CON
Steady speed
operation
Frequency
voltage
Speed search operation
reset
Operating
command
The number of
auto-restart
Chapter 8 Applied Functions
Setting
Range
04 Carrier Freq - 5.0 0.7 ~ 15 kHz kHz
05 PWM Mode 1 Normal PWM
Normal PWM
/Low Leakage PWM
CON-04 Carrier Freq : Selects the operation sound from the motor. The power device(IGBT) inside the inverter
generates high frequency switching voltage to supply to the motor. Here the high frequency is called carrier
frequency. The higher the carrier frequency is, the lower the operation sound generated from the motor is and the
lower the carrier frequency is, the higher the operation sound is.
CON-05 PWM Mode : The heat loss and leak current from the inverter can be reduced according to the load rate. If
you select Normal PWM, you can reduce heat loss and leak current more than when you select Low Leakage
PWM, but the motor sound increases.
2 1 2 1 0 2
The merits and demerits of each load rate and the carrier frequency are as follows.
30s
ec
H27
Carrier Frequency
0.7 kHz 15kHz
Normal PWM LowLeakage PWM
Motor Noise � �
Heat � �
Noise � �
Leak Current � �
Trip
Unit
-
8-39