Grundfos RSI - Page 76

Group 3.1.4: Open loop
Code Parameter Min Max Unit Default ID Description
P3.1.4.1 U/f ratio 0 2 0 108
Type of U/f curve between zero
frequency and the field weakening
point.
0 = Linear
1 = Squared
2 = Programmable
P3.1.4.2 Field WeakngPnt 8.00 P3.3.1.2 Hz Varies 602
The field weakening point is the
output frequency at which the output
voltage reaches the field weakening
point voltage
P3.1.4.3 Voltage at FWP 10.00 200.00 % 100.00 603
Voltage at field weakening point in %
of motor nominal voltage
P3.1.4.4 U/f Mid Freq 0.00 P3.1.4.2 Hz Varies 604
Provided that the programmable U/f
curve has been selected (par.
P3.1.4.1), this parameter defines the
middle point frequency of the curve.
P3.1.4.5 U/f Mid Voltg 0.0 100.0 % 100.0 605
Provided that the programmable U/f
curve has been selected
(par. P3.1.4.1), this parameter
defines the middle point voltage of
the curve.
P3.1.4.6 Zero Freq Voltg 0.00 40.00 % Varies 606
This parameter defines the zero
frequency voltage of the U/f curve.
The default value varies according to
unit size.
P3.1.4.7 Flying Start Options 0 1 0 1590
Check box selection:
B0 = Search shaft frequency from
same direction as frequency
reference.
B1 = Disable AC scanning
B4 = Use frequency reference for
initial guess
B5 = Disable DC pulses
P3.1.4.8 FlyStartScanCurrent 0.0 100.0 % 45.0 1610
Defined in percentage of motor
nominal current.
P3.1.4.9 Auto TorqueBoost 0 1 0 109
Automatic torque boost can be used
in application where starting torque
due to starting friction is high.
0 = Disabled
1 = Enabled
P3.1.4.10 Torque boost motor
gain
0.0 100.0 % 100.0 667
Scaling factor for motoring side IR-
compensation when torque boost is
used.
P3.1.4.11 Torque boost generator
gain
0.0 100.0 % 0.0 665
Scaling factor for generating side IR-
compensation when torque boost is
used.
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