Chapter 5 Parameters
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VFD-S Series
Revision August 2008, SE09, SW V2.61
5-29
RUN
STOP
RUN
STOP
Frequency
Frequency
Time
Time
output
frequency
output
frequency
motor
speed
motor
speed
operation
command
operation
command
stops according to
decel eration time
free run to stop
ramp to stop and free run to stop
2-03
PWM Carrier Frequency Selections
Unit: 1
115V/230V/460V Series
Power
0.25 to 3hp (0.2kW to 2.2kW)
Setting Range
d3 to d10 kHz
Factory Setting
d10 kHz
This parameter determines the PWM carrier frequency of the AC motor drive.
3kHz
10kHz
Carrier
Frequency
Acoustic
Noise
Electromagnetic
Noise or leakage
current
Heat
Dissipation
Current
Wave
Significant
Minimal
Significant
Minimal
Minimal
Significant
Minimal
Significant
From the table, we see that the PWM carrier frequency has a significant influence on the
electromagnetic noise, AC motor drive heat dissipation, and motor acoustic noise.
2-04
Motor Direction Control
Factory Setting: d0
Settings
d0
Enable
forward/reverse
operation
d1
Disable reverse operation
The parameter determines whether the AC drive can operate in the reverse direction.
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