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VLT Automation VT Drive FC322
Programming Guide
1-73 Flying Start
Option:
[0] *
Disabled
[1]
Enabled
When par. 1-73 is enabled, par. 1-71
Search direction for flying start is linked to the setting in par. 4-10, Motor Speed Direction.
Clockwise
[0]: Flying start search in clockwise direction. If not successful, a DC brake is carried out.
Both Directions
[2]: The flying start will first make a search in the direction determined by the last reference (direction). If not finding the speed it will
make a search in the other direction. If not successful, a DC brake will be activated in the time set in par. 2-02, Braking Time. Start will then take place
from 0 Hz.
1-74 Start Speed [RPM]
Range:
Application
[0 - 600 RPM]
dependent*
1-75 Start Speed [Hz]
Range:
Application
[Application dependant]
dependent*
1-76 Start Current
Range:
0.00 A*
[Application dependant]
2.3.7 1-8* Stop Adjustments
Parameters for setting special stop features for the motor.
1-80 Function at Stop
Option:
[0] *
Coast
[1]
DC Hold/Motor Preheat
1-81 Min Speed for Function at Stop [RPM]
Range:
Application
[0 - 600 RPM]
dependent*
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Function:
This function makes it possible to catch a motor, in both directions, which is spinning freely due to
a mains drop-out.
No function
Enables frequency converter to "catch" and control a spinning motor.
Start Delay
has no function.
Function:
Set a motor start speed. After the start signal, the output speed leaps to set value. Set the start
Start Function
function in par. 1-72
Delay
.
Function:
Function:
Some motors, e.g. cone rotor motors, need extra current/starting speed to disengage the rotor. To
obtain this boost, set the required current in par. 1-76
[RPM]
. Set par. 1-72
Start Function
Delay
.
This parameter can be used for hoist applications (cone rotor).
Function:
Select the frequency converter function after a stop command or after the speed is ramped down
to the settings in par. 1-81
Leaves motor in free mode.
Energizes motor with a DC holding current (see par. 2-00
Function:
Set the speed at which to activate par. 1-80
MG.20.W1.22 - VLT is a registered Danfoss trademark
to [3], [4] or [5], and set a start delay time in par. 1-71
Start Current
to [3] or [4], and set a start delay time in par. 1-71
Min Speed for Function at Stop [RPM]
.
DC Hold/Preheat Current
Function at Stop
.
2 Parameter Description
2
Start
Start Speed
. Set par. 1-74
Start
).
49
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