Parameters: 2-** Brakes; Dc Brake; Brake Energy Funct - Danfoss VLT AutomationDrive FC 360 Programming Manual

Parameter Descriptions

4.3 Parameters: 2-** Brakes

4.3.1 2-0* DC Brake

Use this parameter group to configure DC brake and DC
hold functions.
2-00 DC Hold/Motor Preheat Current
Range:
4 4
50 [0 -
% 160 %]
*
2-01 DC Brake Current
Range:
50 [0 -
% 150 %]
*
2-02 DC Braking Time
Range:
10 s [0 - 60 s] Set the duration of the DC brake current set in
*
2-04 DC Brake Cut In Speed
Range:
0 Hz [ 0 - 400
*
Hz]
NOTICE
Parameters 2-01, 2-02 and 2-04 have no effect when
1-10 Motor Construction = [1] PM, non-salient SPM.
38
Programming Guide
Function:
Set holding current as a percentage of the rated
motor current I 1-24 Motor Current. This
M,N
parameter holds the motor function (holding
torque) or pre-heats the motor. This parameter is
active if [0] DC hold is selected in
parameter 1-72 Start Function, or if [1] DC hold/
pre-heat is selected in parameter 1-80 Function at
Stop.
NOTICE
The maximumm value depends on the
rated motor current. Avoid 100% current
for too long. It may damage the motor.
Function:
Set current as % of rated motor current,
parameter 1-24 Motor Current. DC brake current is
applied on stop command, when speed is below
the limit set in parameter 2-04 DC Brake Cut In
Speed; when the DC Brake Inverse function is
active; or via the serial port. See
parameter 2-02 DC Braking Time for duration.
NOTICE
The maximum value depends on the rated
motor current. Avoid 100% current for too
long. It may damage the motor.
Function:
parameter 2-01 DC Brake Current, once
activated.
Function:
This parameter is for setting the DC brake
cut-in speed at which the DC brake current
parameter 2-01 DC Brake Current is to be
active, in connection with a stop command.
Danfoss A/S © Rev. 2014-03-31 All rights reserved.
2-06 Parking Current
Range: Function:
50 % [ 0 - 1000 %] Set current as percentage of rated motor
*
current, 1-24 Motor Current.
2-07 Parking Time
Range: Function:
3 s [0.1 - 60 s] Set the duration of the parking current set in
*
parameter 2-06 Parking Current, once activated.

4.3.2 2-1* Brake Energy Funct.

Parameter group for selecting dynamic braking parameters.
Only valid for frequency converters with brake chopper.
2-10 Brake Function
Option: Function:
[0] Off No brake resistor is installed.
*
[1] Resistor A brake resistor is incorporated in the system for
brake dissipation of surplus brake energy as heat.
Connecting a brake resistor allows a higher DC-
link voltage during braking (generating
operation). The brake resistor function is only
active in frequency converters with an integral
dynamic brake.
[2] AC brake Improves braking without using a brake resistor.
This parameter controls an overmagnetisation of
the motor when running with a generatoric load.
This function can improve the OVC-function.
Increasing the electrical losses in the motor
allows the OVC-function to increase braking
torque without exceeding the voltage limit.
NOTICE
The AC brake is not as efficient as
dynamic braking with resistor.
AC brake is for VVC
and closed loop.
2-11 Brake Resistor (ohm)
Range: Function:
Set the brake resistor value in Ω. This
Size [ 0 -
related 65535 value is used for monitoring the power to
*
Ohm] the brake resistor. Parameter 2-11 Brake
Resistor (ohm) is only active in frequency
converters with an integral dynamic brake.
Use this parameter for values without
decimals.
+ mode in both open
MG06C402