Schneider Altivar 28 Manual De Usario página 83

Configuration
Drive menu d d d d r r r r C C C C - - - -
Code Assignment
- - - - U U U U F F F F t t t t Selection of the type of voltage / frequency ratio
- L : constant torque for motors connected in parallel or special motors
- P : variable torque: pump and fan applications
- n : sensorless flux vector control for constant torque applications
- nLd : energy saving, for variable torque applications or constant torque
applications not requiring high dynamics
- - - - b b b b r r r r A A A A Activating this function automatically adapts the deceleration ramp, if this
has been set at too low a value for the inertia of the load.
no : function inactive. YES : function active.
The adaptation of the deceleration ramp depends on the DEC settings and
the gain FLG (see SET adjust menu page 88).
The function is incompatible with:
• positioning on a ramp
• the use of a braking resistor
- - - - F F F F r r r r t t t t 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.
- - - - S S S S F F F F r r r r 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 1.25% per kHz or 10% at 12 kHz
• above 12 kHz : derated by 10% + 3.3 % per kHz or 19.9% at 15 kHz
- - - - n n n n r r r r d d d d This function randomly modulates the switching frequency to reduce the
motor noise. no : function inactive. YES : function active.
Parameter can be adjusted during operation .
(continued)
Adjustment Factory
range setting
L - P - n - nLd n
no - YES YES
0 to HSP 0 Hz
2 to 15 kHz 4.0
no - YES YES
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