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3.3.6 1-7* Start Adjustments
Parameters for setting special motor start features.
1-71 Start Delay
Range:
Function:
0.0 s*
[0.0 - 120.0 s]
The function selected in par.1-80
is active in the delay period.
Enter the time delay required before commencing acceleration.
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 par.1-73
has no function.
Search direction for flying start is linked to the setting in par.4-10
.
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 unable to find the speed, it will search in the other direction. If not suc-
cessful, a DC brake will be activated in the time set in par.2-02
. Start will then take
place from 0 Hz.
[0] *
Disabled
Select
Disable
[0] if this function is not required
[1]
Enabled
Select
Enable
[1] to enable the adjustable frequency drive to “catch” and control a spinning motor.
3.3.7 1-8* Stop Adjustments
Parameters for setting special stop features for the motor.
1-80 Function at Stop
Option:
Function:
Select the adjustable frequency drive function after a stop command or after the speed is ramped
down to the settings in par.1-81
Min Speed for Function at Stop [RPM]
[0] *
Coast
Leaves motor in free mode.
[1]
DC Hold/Motor Preheat
Energizes motor with a DC holding current (see par.2-00
).
1-81 Min Speed for Function at Stop [RPM]
Range:
Function:
3. RPM*
[0 - 600 RPM]
Set the speed at which to activate par.1-80
1-82 Min Speed for Function at Stop [Hz]
Range:
Function:
0.1 Hz*
[0.0 - 20.0 Hz]
Set the output frequency at which to activate par.1-80
3 Parameter Description
VLT
®
HVAC Drive Programming Guide
3-26
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
3