Parameters: 2-** Brakes - Danfoss VLT AutomationDrive FC 302 Programming Manual

Parameter Descriptions

3.4 Parameters: 2-** Brakes

3.4.1 2-0* DC-Brakes
Parameter group for configuring the DC brake and DC
hold functions.
2-00 DC Hold Current
Range: Function:
50 [ 0 - Enter a value for holding current as a percentage
% 160 %] of the rated motor current I
*
parameter 1-24 Motor Current. 100% DC holding
current corresponds to I
This parameter holds the motor function (holding
torque) or pre-heats the motor.
This parameter is active if DC hold is selected in
parameter 1-72 Start Function [0] or
parameter 1-80 Function at Stop [1].
NOTICE
The maximum value depends on the rated motor
current.
Avoid 100% current for too long. It may damage the
motor.
Low values of DC hold produces larger than expected
currents with larger motor power sizes. This error
increases as the motor power increases.
2-01 DC Brake Current
Range: Function:
50 [ 0 - Enter a value for current as a percentage of the
% 1000 rated motor current I
*
%]
Current. 100% DC braking current corresponds to
I .
M,N
DC brake current is applied on a stop command,
when the speed is lower than the limit set in
parameter 2-03 DC Brake Cut In Speed [RPM]; when
the DC Brake Inverse function is active, or via the
serial communication port. The braking current is
active during the time period set in
parameter 2-02 DC Braking Time.
NOTICE
The maximum value depends on the rated motor
current.
Avoid 100% current for too long. It may damage the
motor.
2-02 DC Braking Time
Range: Function:
10 s [0 - 60 s] Set the duration of the DC braking current set
*
in 2-01 DC Brake Current, once activated.
MG33MJ02
Programming Guide
set in
M,N
.
M,N
, see parameter 1-24 Motor
M,N
Danfoss A/S © Rev. 10/2014 All rights reserved.
2-03 DC Brake Cut In Speed [RPM]
Range: Function:
Size related [ 0 - 60000 Set the DC brake cut-in speed for
*
RPM] activation of the DC braking current
set in parameter 2-01 DC Brake
Current, upon a stop command.
2-04 DC Brake Cut In Speed [Hz]
Range: Function:
Size related [ 0 - 1000.0 Set the DC brake cut-in speed for
*
Hz] activation of the DC braking current
set in parameter 2-01 DC Brake
Current, upon a stop command.
NOTICE
Parameter 2-04 DC Brake Cut In Speed [Hz] has no effect
when 1-10 Motor Construction=[1] PM, non-salient SPM.
2-05 Maximum Reference
Range: Function:
Size [ par. 3-02 - This is an access parameter to
related 999999.999 parameter 3-03 Maximum Reference
*
ReferenceFeed- for legacy products. The maximum
backUnit] reference is the highest value
obtainable by summing all
references. The maximum reference
unit matches the choice of configu-
ration in
parameter 1-00 Configuration Mode
and the unit in
parameter 3-01 Reference/Feedback
Unit.
2-06 Parking Current
Range: Function:
50 % [ 0 - 1000 Set current as percentage of rated motor
*
%] current, parameter 1-24 Motor Current. Is
used when enabled in parameter 1-70 PM
Start Mode.
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.
3.4.2 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.
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