Danfoss VLT Micro Drive FC 51 Series Programming Manual page 21

4. Parameter Descriptions
4.2.5. 1-7* Start Adjustments
Considering the need for various start functions in different applications, it is possible to select a number of functions in this parameter group.
1-71 Start Delay
Range:
*
0.0 s [0.0 - 10.0 s]
4
1-72 Start Function
Option:
[0] DC Hold/Delay Time
[1] DC Brake/Delay Time
Coast/Delay Time
*
[2]
1-73 Flying Start
Option:
Disabled
*
[0]
[1] Enabled
4.2.6. 1-8* Stop Adjustments
To meet the need for various stop functions in different application these parameters offer some special stop features for the motor.
1-80 Function at Stop
Option:
* Coast
[0]
[1] DC hold
1-82 Min. Speed For Function at Stop [Hz]
Range:
*
0.0 Hz [0.0 - 20.0 Hz]
20
Function:
The start delay defines the time to pass from a start command is given until the motor starts accelerating.
Start Function
Setting start delay to 0.0 sec. disables
Enter the time delay required before commencing acceleration.
Par. 1-72 Start Function is active during Start delay time
Function:
Motor is energized with DC holding current (par. 2-00) during start delay time.
Motor is energized with DC braking current (par. 2-01) during start delay time.
Inverter is coasted during start delay time (inverter off).
Function:
The Flying Start parameter is used to catch a spinning motor after eg. mains drop-out.
This function is not suitable for hoisting applications.
Flying start is not required.
Frequency converter enabled to catch spinning motor.
NB!
When flying start is enabled par. 1-71,
function.
Function:
The selected function at stop is active in following situations:
• Stop command is given and output speed is ramped down to
Stop .
• Start command is removed (standby), and output speed is ramped down to
Functions at Stop
.
• DC-brake command is given, and DC-brake time has passed
• While running and calculated output speed is below
The inverter is coasted.
The motor is energized with a DC current. See par. 2-00
Function:
Set the speed at which to activate par. 1-80
MG.02.C4.02 - VLT is a registered Danfoss trademark
VLT Micro Drive FC 51
, [1-72], when start command is given.
.
Start Delay , and par. 1-72,
Min. Speed for Activating Functions at
Min. Speed for Activating
Min. Speed for Activating Functions at Stop
DC Hold Current
for more information.
Function at Stop
.
Start Function , have no
.