Danfoss VLT HVAC Drive FC 102, Programming Manual, Page: 49 / 250

1-63 Slip Compensation Time Constant
Range: Function:
Size
related
*
[0.05 -
5 s]
NOTICE
Parameter 1-63 Slip Compensation
Time Constant
has no effect when
parameter 1-10 Motor
Construction
=[1] PM, non-salient SPM.
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 %]
NOTICE
Parameter 1-64 Resonance Dampening has
no effect when parameter 1-10 Motor
Construction = [1] PM , non-salient SPM.
Enter the resonance damping value. Set
parameter 1-64 Resonance Dampening and
parameter 1-65 Resonance Dampening Time
Constant
to help eliminate high frequency
resonance problems. To reduce resonance
oscillation, increase the value of
parameter 1-64 Resonance Dampening .
1-65 Resonance Dampening Time Constant
Range: Function:
5 ms
*
[5 - 50
ms]
NOTICE
Parameter 1-65 Resonance Dampening
Time Constant
has no effect when
parameter 1-10 Motor Construction = [1]
PM , non-salient SPM.
Set parameter 1-64 Resonance Dampening and
parameter 1-65 Resonance Dampening Time
Constant
to help eliminate high frequency
resonance problems. Enter the time constant
that provides the best dampening.
1-66 Min. Current at Low Speed
Range: Function:
Size
related
*
[ 1 -
200 %]
NOTICE
Parameter 1-66 Min. Current at Low
Speed
does not have effect if
parameter 1-10 Motor Construction = [0]
Asynchron
Enter the minimum motor current at low
speed.
1-66 Min. Current at Low Speed
Range: Function:
Increasing this current improves developed
motor torque at low speed. Low speed is
here defined as speeds below 6% of the
nominal motor speed (
parameter 1-25 Motor
Nominal Speed ) in VVC + PM Control.
3.3.9 1-7* Start Adjustments
1-70 PM Start Mode
Option: Function:
[0] Rotor
Detection Suitable for all applications where the motor is
known to be standing still when starting (for
example conveyors, pumps, and non-wind
milling fans).
[1]
*
Parking If the motor turns at a low speed (that is
lower than 2-5% of the nominal speed), for
example due to fans with light wind milling,
select
[1] Parking and adjust
parameter 2-06 Parking Current and
parameter 2-07 Parking Time accordingly.
1-71 Start Delay
Range: Function:
00 s
*
[0 - 120
s] Enter the time delay between the start
command and the time when the frequency
converter supplies the power to the motor.
This parameter is related to the start function
selected in
1-72 Start Function .
1-72 Start Function
Option: Function:
Select the start function during the start delay.
This parameter is linked to
parameter 1-71 Start
Delay .
[0] DC Hold/
Motor
Preheat
Energizes motor with a DC holding current
(
parameter 2-00 DC Hold/Preheat Current ) during
the start delay time.
[2] Coast Releases shaft coasted converter during the start
delay time (inverter off).
Available selections depend on
parameter 1-10 Motor Construction :
[0] Asynchron :
[2] Coast
[0] DC-hold
[1] PM non-salient:
[2] coast
Parameter Descriptions Programming Guide
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