Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 48

Parameter Description
1-63 Slip Compensation Time Constant
Range:
Size [0.05 -
related 5 s]
*
3 3
1-64 Resonance Dampening
Range:
100 [0 -
% 500 %]
*
1-65 Resonance Dampening Time Constant
Range:
5 ms [5 - 50
*
ms]
1-66 Min. Current at Low Speed
Range:
Size [ 1 -
related 200 %]
*
46
VLT
Function:
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.
Function:
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.
Function:
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.
Function:
NOTICE
Parameter 1-66 Min. Current at Low
Speed has no effect if
parameter 1-10 Motor Construction =
[0] Asynchron.
Enter the minimum motor current at low
speed.
Danfoss A/S © 05/2016 All rights reserved.
®
Refrigeration Drive FC 103
1-66 Min. Current at Low Speed
Range:
3.3.9 1-7* Start Adjustments
1-70 PM Start Mode
Option:
[0] Rotor
Detection
[1] Parking
*
1-71 Start Delay
Range:
00 [0 -
s 300 s]
*
1-72 Start Function
Option:
[0] DC Hold/
Motor
Preheat
[1] DC Brake
[2] Coast
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.
Function:
Suitable for all applications where the motor is
known to be standing still when starting (for
example conveyors, pumps, and non-wind
milling fans).
If the motor turns at a low speed (that is
lower than 2–5% of the nominal speed), for
example due to fans with windmilling, select
[1] Parking and adjust parameter 2-06 Parking
Current and parameter 2-07 Parking Time
accordingly.
Function:
Enter the time delay between the start command
and the time when the frequency converter
supplies power to the motor.
This parameter is related to the start function
selected in parameter 1-72 Start Function.
The parameter is used for delayed start of
compressor functionality in injection control.
Parameter 28-91 Delayed Compressor Start controls
the delayed start feature. Set the start delay value
equal to or greater than the default value.
Function:
Select the start function during the start
delay. This parameter is linked to
parameter 1-71 Start Delay.
Energizes motor with a DC holding current
(parameter 2-00 DC Hold/Preheat Current)
during the start delay time.
Energises motor with a DC braking current
(parameter 2-01 DC Brake Current) during the
start delay time.
Releases shaft coasted converter during the
start delay time (inverter off).
Available selections depend on
parameter 1-10 Motor Construction:
[0] Asynchron:
MG16H202