ＮＩＳＳＥＩ ＣＯＲＰＯＲＡＴＩＯＮ E6581815
F-23
6
* If ambient temperature exceeds 40°C, take the upper danger label off and reduce current according to table
above.
* The table above is the value when the inverter is installed in general described in section 1.4.4.
* Default setting of PWM carrier frequency is 12kHz, but rated output current of rating label display at 4kHz.
If is set to or , however, the carrier frequency will decrease automatically with increase in current
in order to secure the rated current at frequencies of 4 kHz or less.
* If
, and current is increased to the automatic reduction level, the alarm occurs, if current is
increased further trips.
* Random mode is exercised when the motor is operated in a low-frequency range where it produces annoying
acoustic noise.
If the carrier frequency () is set above 8 kHz, the random mode function will not be performed,
because the level of motor magnetic noise is low at high frequencies.
6.11 Trip-less intensification
6.11.1 Auto-restart (Restart of coasting motor)
f301 : Auto-restart control selection
Caution
Mandatory
action
Stand clear of motors and mechanical equipment
If the motor stops due to a momentary power failure, the equipment will start suddenly when power is
restored.
This could result in unexpected injury.
Attach warnings about sudden restart after a momentary power failure on inverters, motors and
equipment for prevention of accidents in advance.
Function
The
f301 parameter detects the rotating speed and rotational direction of the motor during
coasting at the event of momentary power failure, and then after power has been restored, restarts
the motor smoothly (motor speed search function). This parameter also allows commercial power
operation to be switched to inverter operation without stopping the motor.
During operation, "
rtry" is displayed.
[Parameter setting]
Title Function Adjustment range Default setting
f301
Auto-restart control
selection
0: Disabled
1: At auto-restart after momentary stop
2: At ST terminal off and on
3: 1
2
4: At start-up
0
* If the motor is restarted in retry mode, this function will operate, regardless of the setting of this parameter.
To Next Page
Loading...
General