5-5
n080
CARRIER FREQUENCY(kHz) SLOPE OUTPUT FREQUENCY(Hz)
MODE
SETTING Maximum(FcMAX) Minimum(FcMIN)
(=Fc)
Fo
F1 F2
1 2.5 2.5 0 NA NA CONSTANT
2 5.0 5.0 0 NA NA
3 7.5 7.5 0 NA NA
4 10.0 10.0 0 NA NA
7 2.5 1.0 12 83.3 208.3
SYNCHRONOUS
8 2.5 1.0 24 41.6 104.1
9 2.5 1.0 36 27.7 69.4
n080 : Carrier Frequency Factory Setting: 3
Range: 1 to 4; 7 to 9
The relationship between output frequency and carrier frequency is determined from the set value
of n080 .
(a) For constant carrier frequency, set to " 1 ", " 2 ", " 3 ", " 4 ".
(b) For synchronous mode, set n080 to " 7 ", " 8 ", or " 9 ". These setting values
establish carrier frequencies of 12f, 24f, or 36f, respectively.
FcMAX
CARRIER
FREQUENCY
SLOPE
Fc
MIN
0 F1 F2
OUTPUT FREQUENCY
5.5 CARRIER FREQUENCY
n175 : Reduce carrier at low speed selection Factory Setting: 0
Range: 0 or 1
When n175 is enabled (= “1”), the carrier frequency will automatically be reduced to 2.5 kHz,
regardless of the setting of n080, whenever the output frequency is at or below 5 Hz AND
the
output current is above 110% of drive rated current.
Carrier frequency should be decreased as the distance between the drive and the motor increases,
to reduce capacitive coupling in the motor leads.
• For wiring distances greater than 100m (328 ft.), n080 should be set to 5 kHz (data " 2 " )
or less.
SETTING DESCRIPTION
0 Disabled
1 Carrier frequency reduced to 2.5 KHz
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