Danfoss VLT AQUA Drive FC 200 Programming Manual page 51

Parameter Description
1-66 Min. Current at Low Speed
Range: Function:
Size related [ 1 - 200 Enter the minimum motor current at
*
%] low speed.
Increasing this current improves
developed motor torque at low speed.
Low speed is defined here as speeds
below 6% of the Nominal Speed of
Motor (1-25 Motor Nominal Speed) in
VVC plus
NOTICE!
1-66 Min. Current at Low Speed will not have effect if
1-10 Motor Construction=[0]
3.3.8 1-7* Start Adjustments
1-70 PM Start Mode
Option: Function:
[0] Rotor Suitable for all applications where the motor
Detection is known to be standing still when starting
(e.g., conveyors, pumps and non-windmilling
fans).
[1] Parking If the motor turns at a slight speed (i.e., lower
than 2‒5% of the nominal speed), e.g., due to
fans with light windmilling, select [1] Parking
and adjust 2-06 Parking Current and
2-07 Parking Time accordingly.
1-71 Start Delay
Range: Function:
00 s [0 - 120 s] The function selected in 1-80 Function at Stop
*
is active in the delay period.
Enter the time delay required before
commencing acceleration.
1-72 Start Function
Option: Function:
Select the start function during start delay. This
parameter is linked to 1-71 Start Delay.
[0] DC Hld/ Energizes motor with a DC holding current
Motr (2-00 DC Hold/Preheat Current) during the start
Preheat delay time.
[2] Coast Motor coasted during the start delay time
(inverter off).
Available selections depend on 1-10 Motor
Construction:
[0] Asynchron:
[2] coast
[0] DC hold
®
VLT AQUA Drive Programming Guide
PM Control
®
MG20O622 - VLT is a registered Danfoss trademark
1-72 Start Function
Option: Function:
[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 line drop-out.
When 1-73 Flying Start is enabled, 1-71 Start Delay
has no function.
Search direction for Flying Start is linked to the
setting in 4-10 Motor Speed Direction.
[0] Clockwise: Flying Start search in clockwise
direction. If not successful, a DC brake is carried
out.
[2] Both Directions: The Flying Start will first make a
search in the direction determined by the last
reference (direction). If unable to find the speed, it
will search in the other direction. If not successful,
a DC brake will be activated in the time set in
2-02 DC Braking Time. Start will then take place
from 0 Hz.
[0] Disabled Select [0] Disable if this function is not required
[1] Enabled Select [1] Enable to enable the adjustable
frequency drive to "catch" and control a spinning
motor.
The parameter is always set to [1] Enable when
1-10 Motor Construction = [1] PM non-salient.
Important related parameters:
•
1-58 Flystart Test Pulses Current
•
1-59 Flystart Test Pulses Frequency
•
1-70 PM Start Mode
•
2-06 Parking Current
•
2-07 Parking Time
•
2-03 DC Brake Cut-in Speed [RPM]
•
2-04 DC Brake Cut-in Speed [Hz]
•
2-06 Parking Current
•
2-07 Parking Time
When 1-73 Flying Start is enabled, 1-71 Start Delay has no
function.
Search direction for Flying Start is linked to the setting in
4-10 Motor Speed Direction.
[0] Clockwise: Flying Start search in clockwise direction. If
not successful, a DC brake is carried out.
[2] Both Directions: The Flying Start will first make a search
in the direction determined by the last reference
3 3
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