4-203
Group 11: Auxiliar
Parameters
11- 00
Direction Lock Selection
Range
【0】: Allow Forward and Reverse Rotation
【1】: Only Allow Forward Rotation
【2】: Only Allow Reverse Rotation
If motor operation direction is set to 1 or 2, the motor can only operate in that specific direction. Run
commands in the opposite direction are not accepted.
Forward or reverse commands can be issued via the control terminals or keypad.
Note: The reverse rotation selection can be used in fan and pump application where reverse rotation is
prohibited.
11- 01
Carrier Frequency
Range
【0】:
Carrier Output Frequency Tuning
【1~16】KHz
Notes:
(1) Value 1 to 16 represents KHz.
(2) When 11-01=0, variable carrier frequency is used see parameter 11-30~11-32.
(3) For SLV mode, the minimum value of 11-01 is 2 kHz, due to the sample rate, suggest to use 4KHz,
and the motor cable used within 100m.
(4) Setting range is determined by the inverter rating (13-00).
(5) Refer to section 3 inverter derating based on carrier frequency.
(6) A low carrier frequency increases motor noise but reduces motor losses and temperature.
(7) A low carrier frequency decreases RFI, EMI interference and motor leakage current.
Refer to the carrier frequency Table 4.4.11.
Table 4.4.11 Carrier frequency settings
Carrier frequenc
1KHz--6KH—10KHz—16KHz
Motor noise
High ---------------------- low
Output current waveform (similar to
sinusoidal wave
Bad ------ Good ------- Bad
Noise interference
Low ---------------------- high
Leakage current
Low ---------------------- high
Heat losses
Low ---------------------- high
If wire length between the inverter and the motor is too long, the high-frequency leakage current will cause
an increase in inverter output current, which might affect peripheral devices. Adjust the carrier frequency to
avoid this as shown in Table 4.4.12.
Table 4.4.12 Wire length and carrier frequency
Wire length < 30 Meter (98ft)
up to 50 Meter
(164 ft)
up to 100 Meter
(328ft)
> 100 Meter
> 328ft
Carrier frequency
(11-01 value )
Max. value 16KHz
(11-01=16KHz)
Max. value 10KHz
(11-01=10KHz)
Maxi. value 5KHz
(11-01=5KHz)
Max. value 2KHz
(11-01=2KHz)
Notes:
- Reduce the carrier frequency if the torque does not match the speed.
- In V/F control mode, the carrier frequency is determined by parameters 11-30 (Carrier frequency
max. limit), 11-31 (Carrier frequency lower limit) and 11-32 (Carrier frequency proportional gain)
after parameter 11-01 is setted to be 0.
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