Danfoss VLT Micro Drive FC 51 Series - Page 21

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: Function:
The start delay defines the time to pass from a start command is given until the motor starts accelerating.
Setting start delay to 0.0 sec. disables
Start Function , [1-72], when start command is given.
0.0 s
* [0.0 - 10.0 s]
Enter the time delay required before commencing acceleration.
Par. 1-72
Start Function is active during Start delay time .
1-72 Start Function
Option: Function:
[0] DC Hold/Delay Time Motor is energized with DC holding current (par. 2-00) during start delay time.
[1] DC Brake/Delay Time Motor is energized with DC braking current (par. 2-01) during start delay time.
[2]
*
Coast/Delay Time Inverter is coasted during start delay time (inverter off).
1-73 Flying Start
Option: 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.
[0] *
Disabled Flying start is not required.
[1] Enabled Frequency converter enabled to catch spinning motor.
NB!
When flying start is enabled par. 1-71,
Start Delay , and par. 1-72, Start Function , have no
function.
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: Function:
The selected function at stop is active in following situations:
• Stop command is given and output speed is ramped down to
Min. Speed for Activating Functions at
Stop
.
• Start command is removed (standby), and output speed is ramped down to
Min. Speed for Activating
Functions at Stop
.
• DC-brake command is given, and DC-brake time has passed
• While running and calculated output speed is below
Min. Speed for Activating Functions at Stop .
[0]
*
Coast The inverter is coasted.
[1] DC hold The motor is energized with a DC current. See par. 2-00
DC Hold Current for more information.
1-82 Min. Speed For Function at Stop [Hz]
Range: Function:
0.0 Hz * [0.0 - 20.0 Hz]
Set the speed at which to activate par. 1-80
Function at Stop .
4. Parameter Descriptions VLT
p
Micro Drive FC 51
20 MG.02.C4.02 - VLT
p
is a registered Danfoss trademark
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