LSIS 6731001500, User Manual

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Learning Advanced Features
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If the auto restart number is set, be careful when the inverter resets from a fault trip. The motor
may automatically start to rotate.
•
In HAND mode, auto restart resets the trip condition but it does not restart the inverter operation.
•
In AUTO mode,
- if the auto restart is configured, the inverter restarts after a trip condition is released
(command via digital input is used to restart the operation).
- if the auto restart is not configured and the trip condition is released using the OFF key,
or the switches at the terminal input, the inverter stays in the OFF state. Because the
command information is reset along with the trip condition, a new command is required
to operate the inverter.
5.29 Operational Noise Settings (Carrier Frequency
Settings)
Group Code Name LCD Display Parameter Setting
Setting
Range
Unit
CON
04 Carrier Frequency Carrier Freq
3.0 0.75~90kW 1.0–15.0
kHz 2.0 110~355kW 1.0~5.0
1.5 400/500kW 1.0~4.0
05 Switching Mode PWM* Mode 0 Normal PWM 0–1 -
* PWM: Pulse width modulation
Operational Noise Setting Details
Code Description
CON-04
Carrier Freq
Adjusts motor operational noise by changing carrier frequency settings. Power
transistors (IGBT) in the inverter generate and supply high frequency switching
voltage to the motor. The switching speed in this process refers to the carrier
frequency. If the carrier frequency is set high, it reduces operational noise from
the motor. If the carrier frequency is set low, it increases operational noise from
the motor.
CON-05 PWM
Mode
The heat loss and leakage current from the inverter can be reduced by changing
the load rate option at CON-05 (PWM Mode). Selecting ‘1 (LowLeakage PWM)’
reduces heat loss and leakage current, compared to when ‘0 (Normal PWM)’ is
selected. However, it increases the motor noise. Low leakage PWM uses a 2