57
2-8-18 Carrier Frequency
Item name
Constant to be set
Factory preset
Carrier frequency upper limit
No. 40
4
Changing the carrier frequency reduces RFI noise and leakage
current without increasing motor noise.
Carrier frequency (kHz) = 2.5 kHz
×
constant No. 40 value
6
1
0
No. 40
Carrier frequency
: Factory setting prior to shipment
Output frequency
1
2
3
4
5
6
Carrier frequency
(LOW)
(HIGH)
Metallic noise
from motor
(Rather high)
(Not audible)
4
Note
Reduce continuous output current for changing the frequency to 5
or 6.
Carrier Frequency
Set Value
Maximum Continuous Output Current
1 to 4
Up to 100% of Inverter output current
5
Up to 90% of Inverter output current
6
Up to 80% of Inverter output current
If the wiring distance between the Inverter and motor is long,
reduce the carrier frequency. For details, refer to the wiring precau-
tions described in
1-4 Wiring.
2-8-19 Speed Agreed Signal Output
Item name
Constant to be set
Factory preset
Frequency detection level
No. 36
0.0 Hz
Multifunction contact output function
No. 34 and No. 35
No. 34 = 0, No. 35 = 1
This function is used when operation at an arbitrary speed must be
indicated. Set the multifunction contact output (No. 34, No. 35) as
follows:
Set Value = 1: Frequency Agreed
Detection width
2 Hz
Output frequency
Frequency agreed signal
Release width
4 Hz
Frequency
reference
Closed
Description of Functions and Constants
Section 2-8
