WEG CFW300 V1.3X, Programming Manual

Page: 45 / 157

Identification of the Inverter Model and Accessories
CFW300 | 6-3
6
P295 - Inverter Rated Current
Adjustable
Range:
1.6 to 15.2 A Factory
Setting:
According
inverter
model
Properties:
ro
Description:
This parameter presents the inverter rated current as per Table 6.3 on page 6-2 .
P296 - Line Rated Voltage
Adjustable
Range:
0 = Reserved
1 = 110 / 127 Vac
2 = 200 / 240 Vac or 310 Vdc
Factory
Setting:
According
inverter
model
Properties: ro
Description:
This parameter presents the inverter power supply according to identification performed after power-up.
P297 - Switching Frequency
Adjustable
Range:
2.5 to 15.0 kHz
Factory
Setting:
5.0 kHz
Properties: cfg
Description:
You can use this parameter to define the inverter IGBT switching frequency.
The inverter switching frequency may be adjusted according to the application needs. Higher switching
frequencies imply less acoustic noise in the motor. However, the switching frequency choice results in a
compromise among the acoustic noise in the motor, the inverter IGBT losses and the maximum permitted
currents.
The reduction of the switching frequency reduces the effects related to the motor instability, which occurs in
certain application conditions. Besides, it reduces the earth leakage current, preventing the actuation of the
faults F070 (output overcurrent or short-circuit).
P219 - Start Point of the Switching Frequency Reduction
Adjustable
Range:
0.0 to 15.0 Hz
Factory
Setting:
15.0 Hz
Properties:
cfg
Description:
It defines the point at which automatic gradual reduction of the switching frequency occurs. That significantly
improves the measurement of the output current at low frequencies and consequently the performance of the
inverter.
NOTE!
Both the function related to P219 and the function controlled by P397 (bit 3) act by reducing the
switching frequency. As the function related to P219 is intended to improve the reading of the inverter
current, that function has priority of action over the function controlled by P397 (bit 3).