Danfoss VLT AQUA Drive FC 202 Programming Guide

1-65 Resonance Damping Time Constant
Range: Function:
5 ms* [5 - 50
ms]
NOTICE
Parameter 1-65 Resonance Damping Time
Constant has no eect when
parameter 1-10 Motor Construction = [1]
PM, non-salient SPM.
Set parameter 1-64 Resonance Damping and
parameter 1-65 Resonance Damping 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 has no eect if
parameter 1-10 Motor Construction =
[0] Asynchron.
Enter the minimum motor current at low
speed.
Increasing this current improves developed
motor torque at low speed. Low speed is
here dened as speeds below 6% of the
nominal motor speed (parameter 1-25 Motor
Nominal Speed) in VVC
+
PM Control.
3.3.11 1-7* Start Adjustments
1-70 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 windmilling, select [1] Parking
and adjust parameter 2-06 Parking Current and
parameter 2-07 Parking Time accordingly.
[2] Rotor Det.
w/ Parking
1-71 Start Delay
Range: Function:
00 s* [0 -
300 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 parameter 1-72 Start Function.
1-72 Start Function
Option: Function:
Select the start function during start delay. This
parameter is linked to parameter 1-71 Start Delay.
[0] DC Hold/
Motor
Preheat
Energizes the motor with a DC hold current
(parameter 2-00 DC Hold/Preheat Current) during
the start delay time.
[2] Coast Motor coasted during the start delay time
(inverter o).
Available selections depend on
parameter 1-10 Motor Construction: [0] Asynchron:
•
[2] Coast.
•
[0] DC hold.
[1] PM non-salient:
•
[2] Coast.
1-73 Flying Start
Option: Function:
This function makes it possible to catch a motor
that is spinning freely due to a mains dropout.
When parameter 1-73 Flying Start is enabled,
parameter 1-71 Start Delay has no function.
Search direction for ying start is linked to the
setting in parameter 4-10 Motor Speed Direction.
[0] Clockwise: Flying start searches in clockwise
direction. If not successful, a DC brake is carried
out.
[2] Both Directions: The ying start rst makes a
search in the direction determined by the last
reference (direction). If the speed is not found, it
makes a search in the other direction. If not
successful, a DC brake is activated in the time set
in parameter 2-02 DC Braking Time. Start then takes
place from 0 Hz.
[0] Disabled Select [0] Disable if this function is not required.
[1] Enabled Select [1] Enable to enable the frequency converter
to catch and control a spinning motor.
The parameter is always set to [1] Enable when
parameter 1-10 Motor Construction = [1] PM non-
salient.
Important related parameters:
•
Parameter 1-58 Flying Start Test Pulses
Current.
•
Parameter 1-59 Flying Start Test Pulses
Frequency.
•
Parameter 1-70 Start Mode.
•
Parameter 2-03 DC Brake Cut In Speed
[RPM].
•
Parameter 2-04 DC Brake Cut In Speed [Hz].
•
Parameter 2-06 Parking Current.
Parameter Description
VLT
®
AQUA Drive FC 202
56 Danfoss A/S © 05/2018 All rights reserved. MG20OB02
33

Danfoss VLT AQUA Drive FC 202 Specifications

General

Brand	Danfoss
Model	VLT AQUA Drive FC 202
Category	DC Drives
Language	English