7-9
Other Operation Functions
This section describes the parameters associated with other operation functions.
7-9-1
Carrier Frequency
Use this function to change the carrier frequency output from the inverter in a PWM waveform.
Set a higher carrier frequency value to reduce the metallic noise from the motor.
However, this results in an increase in electrical noise or leakage current from the inverter.
By setting the level of Motor Sound Tone (F27), it may be possible to reduce the metallic noise gener-
ated by the motor. Motor Sound Tone (F27) is enabled if the setting of Carrier Frequency (F26) is 7
kHz or below.
Parame-
ter No.
Function name Data Default data Unit
F26 Carrier Frequency
0: 0.75 kHz
1: 1 kHz
2: 2 kHz
3: 3 kHz
4: 4 kHz
5: 5 kHz
6: 6 kHz
7: 7 kHz
8: 8 kHz
9: 9 kHz
10: 10 kHz
1
1: 11 kHz
12: 12 kHz
13: 13 kHz
14: 14 kHz
15: 15 kHz
16: 16 kHz
2
-
F27
Motor Sound Tone
0: Level 0 (Disable)
0
1: Level 1
2: Level 2
3: Level 3
Related function E165
• Derating of the output current may be required depending on the installation environment or the set-
ting of Carrier Frequency (F26). For derating in each inverter model, refer to A-1 Derating Table on
page A-2.
Set the output current value to be derated as electronic thermal level.
This setting, however
, is unnecessary if the electronic thermal level is already set to the derating val-
ue or lower.
For details on the electronic thermal function, refer to 5-3-3 Motor Electronic Thermal Function on
page 5-20.
• Depending on the motor, the effect of Motor Sound Tone (F27) may be less. If the level of Motor
Sound Tone (F27) is increased too much, the output current may become disordered, and the ma-
chine vibrations or noise may increase.
7 Other Functions
7-113
M1 Series Standard Type User's Manual (I669)
7-9 Other Operation Functions
7
7-9-1 Carrier Frequency
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