81
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Configuration
Drive menu
(continued)
Code
Assignment
Adjustment
range
Factory
setting
-UFt
Selection of the type of voltage / frequency ratio
- L : constant torque for motors connected in parallel or special motors
- P : variable torque
- n : sensorless flux vector control for constant torque applications
- nLd : energy saving, for variable torque applications
L - P - n - nLd n
-brA
Activating this function automatically increases the deceleration time, if this
has been set at too low a value for the inertia of the load, thus avoiding the
controller going into ObF fault.
no : function inactive. YES : function active.
This function may not be compatible with position control on a ramp or with
the use of a braking resistor.
no - YES
YES
-Frt
Ramp switching frequency
When the output frequency becomes greater than Frt, the ramp times taken
into account are AC2 and dE2. If Frt = 0, the function is inactive.
This parameter does not appear if a logic input is assigned to the ramp
switching function rP2.
0 to HSP
0 Hz
-SFr
Switching frequency
The switching frequency can be adjusted to reduce the noise generated by
the motor.
Above 4 kHz, the speed controller output current must be derated :
• up to 12 kHz : derated by 10 %
• above 12 kHz : derated by 20 %.
2 to 15 kHz
4.0
-nrd
This function randomly modulates the switching frequency to reduce the
motor noise. no : function inactive. YES : function active.
no - YES
YES
Parameter can be adjusted during operation.
drC-
