Danfoss VLT HVAC Series Programming Manual page 50

3 Parameter Description
3.3.6 1-7* Start Adjustments
Parameters for setting special motor start features.
1-71 Start Delay
Range:
0.0 s* [0.0 - 120.0 s]
3
1-73 Flying Start
Option:
[0] * Disabled
[1] Enabled
3.3.7 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:
3. RPM* [0 - 600 RPM]
1-82 Min Speed for Function at Stop [Hz]
Range:
0.1 Hz* [0.0 - 20.0 Hz]
3-26
Function:
Function at Stop
The function selected in par.1-80
Enter the time delay required before commencing acceleration.
Function:
This function makes it possible to catch a motor that is spinning freely due to a line drop-out.
When par.1-73 Flying Start is enabled, par.1-71
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
place from 0 Hz.
Select Disable [0] if this function is not required
Enable
Select [1] to enable the adjustable frequency drive to "catch" and control a spinning motor.
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]
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
Function:
Set the output frequency at which to activate par.1-80
MG.11.C6.22 - VLT ® is a registered Danfoss trademark
VLT ® HVAC Drive Programming Guide
is active in the delay period.
Start Delay has no function.
Motor Speed Direction
DC Braking Time
. Start will then take
.
DC Hold/Preheat Current
Function at Stop .
Function at Stop .
.
).