Operating instructions

1-58 Flystart Test Pulses Current
Range: Function:
30 % * [0 - 200
%]
Control the percentage of the magnetizing
current for the pulses used to detect the motor
direction. Reducing this value will reduce the
generated torque. 100% means nominal motor
current. The parameter is active when
par. 1-73 Flying Start is enabled. This parameter
is only available in VVC
plus
.
1-59 Flystart Test Pulses Frequency
Range: Function:
200 % * [0 - 500
%]
Control the percentage of the frequency for the
pulses used to detect the motor direction.
Increasing this value will reduce the generated
torque. 100% means 2 times the slip frequency.
The parameter is active when par. 1-73 Flying
Start is enabled. This parameter is only available
in VVC
plus
.
3.3.5 1-6* Load Depend. Setting
1-60 Low Speed Load Compensation
Range: Function:
100 % * [0 - 300
%]
Enter the % value to compensate voltage in
relation to load when the motor is running at
low speed and obtain the optimum U/f charac-
teristic. The motor size determines the frequen-
cy range within which this parameter is active.
Motor size Change over
0.25 kW - 7.5 kW < 10 Hz
11 kW - 45 kW < 5 Hz
55 kW - 550 kW < 3-4 Hz
1-61 High Speed Load Compensation
Range: Function:
100 % * [0 - 300
%]
Enter the % value to compensate voltage in
relation to load when the motor is running at
high speed and obtain the optimum U/f charac-
teristic. The motor size determines the frequen-
cy range within which this parameter is active.
Motor size Change-over
0.25 kW - 7.5 kW > 10 Hz
11 kW - 45 kW < 5 Hz
55 kW - 550 kW < 3-4 Hz
1-62 Slip Compensation
Range: Function:
0 % * [-500 - 500
%]
Enter the % value for slip compensation, to
compensate for tolerances in the value of n
M,N
.
Slip compensation is calculated automatically,
i.e. on the basis of the rated motor speed
n
M,N
.
1-63 Slip Compensation Time Constant
Range: Function:
Application
dependent
*
[0.05 - 5.00
s]
Enter the slip compensation reaction
speed. A high value results in slow
reaction, and a low value results in
quick reaction. If low-frequency
resonance problems arise, use a
longer time setting.
1-64 Resonance Dampening
Range: Function:
100 % * [0 - 500
%]
Enter the resonance dampening value. Set
par. 1-64 Resonance Dampening and
par. 1-65 Resonance Dampening Time Constant
to help eliminate high-frequency resonance
problems. To reduce resonance oscillation,
increase the value of par. 1-64 Resonance
Dampening.
1-65 Resonance Dampening Time Constant
Range: Function:
5 ms * [5 - 50 ms] Set par. 1-64 Resonance Dampening and
par. 1-65 Resonance Dampening Time Constant
to help eliminate high-frequency resonance
problems. Enter the time constant that
provides the best dampening.
Parameter Description
VLT
®
HVAC Drive Programming Guide
42 MG.11.CA.02 - VLT
®
is a registered Danfoss trademark
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