154 • Chapter 7 - Parameters Description AGy-EV Instruction manual
P.063 V/f interm volt (V/f intermediate voltage)
Intermediate "voltage" value of the V/f characteristic selected.
P.064 V/f interm freq (V/f intermediate frequency)
Intermediate "frequency " value of the V/f characteristic selected.
NOTE! When custom V/f shape is selected (P.060 = 0):
P.064 parameter represents the return point of the output voltage, on the linear V/f characteristic (see
figure 7.6.8).
Code LCD display [Code] & LCD select. Default MIN MAX Unit Variation IPA
P.060 V/f shape [0] Custom 1 0 2 412
[1] Linear
[2] Quadratic
P.061 Max out voltage (**) 50 (**) V 1 413
P.062 Base frequency (**) 25 500 Hz 0.1 414
P.063 V/f interm volt (**) 0 P.061 V 1 415
P.064 V/f interm freq (**) 1 P.062 Hz 0.1 416
Ouput Frequency Limit
P.080 Max output freq (Maximum output frequency)
It is the maximum allowed of the output frequency of the drive, expressed as percentage of Max ref freq (F.020).
NOTE! When using slip compensation or PID speed regulation, P.080 should be set to a value higher than
100%, in order to allow for frequency regulation also when the frequency reference approaches its
maximum value, defined by Max ref freq (F.020).
P.081 Min output freq (Minimun output frequency)
Minimum value of output frequency, under which no frequency regulation has effect.
It is expressed as percentage of Max ref freq (F.020).
The parameter is correlated to the Min ref freq (F.021). See description of parameter F.021 for further details.
Code LCD display [Code] & LCD select. Default MIN MAX Unit Variation IPA
P.080 Max output freq 110 0 110 % of F.020 1 417
P.081 Min output freq 0.0 0.0 25.0 % of F.020 0.1 418
Slip Compensation
P.100 Slip compensat (Slip compensation)
When an induction motor is loaded, the mechanical speed of the shaft varies due to the electrical slip between
stator and rotor quantities which is responsible for the generation of torque.
In order to keep the shaft speed constant, the slip compensation function of the drive can be used.
The compensation is performed by varying the inverter output frequency of an amount that is calculated from
inverter output current and motor parameters. therefore, in oder to obtain best results, motor nameplate data
has to be properly set, and the correct value of the stator resistance (P.043) has to be either edited or
measured by self-tuning (S.901). Tuning of the slip compensation function is performed by editing the
parameter P.100. If P.100 = 0.0 (default), the slip compensation assumes the nominal value, calculated from
nameplate data.
P.100 = 0.0 (value by default), the slip compensation has been deactivated.
P.100 =100.0, the slip compensation assumes the nominal value calculated from the motor characteristics board.
NOTE! The Slip compensation must be disabled when a multiple motor connection is being used.
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