Parameters: 2-** Brakes - Danfoss VLT AutomationDrive FC 300 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
*
160 %] percentage of the rated motor current I
in 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
1-72 Start Function [0] or 1-80 Function at Stop
[1].
NOTE
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 will produce larger than expected
currents with larger motor power sizes. This error will
increase 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
*
100% DC braking current corresponds to I
DC brake current is applied on a stop
command, when the speed is lower than the
limit set in 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
2-02 DC Braking Time.
NOTE
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.
®
VLT AutomationDrive Programming Guide
set
M,N
.
M,N
, see 1-24 Motor Current.
M,N
.
M,N
®
MG33MG02 - VLT is a registered Danfoss trademark
2-03 DC Brake Cut In Speed [RPM]
Range:
Size related [ 0 - 60000 Set the DC brake cut-in speed for
*
RPM] activation of the DC braking
current set in 2-01 DC Brake
Current, upon a stop command.
2-04 DC Brake Cut In Speed [Hz]
Range:
Size related [ 0 - 1000.0
*
Hz]
NOTE
2-04 DC Brake Cut In Speed [Hz] will not have effect when
1-10 Motor Construction = [1] PM, non salient SPM.
2-05 Maximum Reference
Range:
Size [ par. 3-02 -
related 999999.999
*
ReferenceFeed-
backUnit]
2-06 Parking Current
Range: Function:
50 % [ 0 - 1000 %] Set current as percentage of rated motor
*
current, 1-24 Motor Current. Will be used
when enabled in 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
*
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.
Function:
Function:
Set the DC brake cut-in speed for
activation of the DC braking
current set in 2-01 DC Brake
Current, upon a stop command.
Function:
This is an access parameter to
3-03 Maximum Reference for
legacy products. The maximum
reference is the highest value
obtainable by summing all
references. The maximum
reference unit matches the
choice of configuration in
1-00 Configuration Mode and the
unit in 3-01 Reference/Feedback
Unit.
55
3 3