Parameter Group 2: Brakes - Danfoss VLT Micro Drive FC 51 Series Programming Manual

4. Parameter Descriptions

4.3. Parameter Group 2: Brakes

4.3.1. 2-** Brakes
4.3.2. 2-0* DC-Brake
The purpose of DC-brake function is to brake a rotating motor by applying DC-current to the motor.
2-00 DC Hold Current
Range:
4
*
50% [0 - 100%]
NB!
Avoid 100% current too long as it may overheat the motor.
2-01 DC Brake Current
Range:
*
50 % [0 - 150%]
2-02 DC-Braking Time
Range:
*
10.0 s [0.0 - 60 s]
NB!
If DC-brake is activated as start function, DC-brake time is defined by
2-04 DC-Brake Cut-in Speed
Range:
*
0.0 Hz [0.0 - 400.0 Hz]
22
Function:
This parameter either holds the motor (holding torque) or pre-heats the motor.
DC Hold
The parameter is active if has been selected in either par. 1-72
Stop .
Enter a value for holding current as a percentage of the rated motor current set in par. 1-24
100% DC holding current corresponds to I
Function:
Set DC-current needed to brake rotating motor.
Activate DC-brake in one of the four following ways:
1. DC-brake command, see par. 5-1* choice [5]
2. DC Cut-in function, see par. 2-04
3. DC-brake selected as start function, see par. 1-72
4. DC-brake in connection with Flying Start
Function:
DC-braking time defines the period during which
Set the time DC-braking current, set in par. 2-01, must be applied.
Function:
Set DC-brake cut-in speed to activate DC braking current, set in par. 2-01, when ramping down.
When set to 0 the function is off.
MG.02.C4.02 - VLT is a registered Danfoss trademark
VLT Micro Drive FC 51
Start Function
.
M,N
, par. 1-73.
DC-brake current is applied to the motor.
start delay time
.
Function at
or par. 1-80
Motor Current .