Parameters: Brakes - Danfoss FC 300 Design Manual

FC 300 Design Guide

Parameters: Brakes

"
2-** Brakes
"
Parameter group for setting brake features in
the adjustable frequency drive.
2-0* DC Brakes
"
Parameter group for configuring the DC brake
and DC hold functions.
2-00 DC Hold Current
Range:
0 - 100%
Function:
Enter a value for holding current as a percentage
of the rated motor current I
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 par. 1-72 Start Function [0] or par. 1-80
Function at Stop [1].
NOTE
The maximum value depends on the
rated motor current.
NOTE
Avoid 100% current for too long. It may
damage the motor.
2-01 DC Brake Current
Range:
0 - 100%
Function:
Enter a value for current as a percentage of the rated
motor current I , see par. 1-24 Motor Current.
M,N
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
par. 2-03 DC Brake Cut In Speed; 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 par. 2-02 DC Braking Time.
* default setting ( )
How to Program
*
set in par.
M,N
.
M,N
*
.
M,N
display text [ ] value for use in communication via serial communication port
MG.33.B6.22 - VLT is a registered Danfoss trademark
NOTE
The maximum value depends on the
rated motor current.
NOTE
Avoid 100 % current for too long. It may
damage the motor.
2-02 DC Braking Time
Range:
0.0 - 60.0 s.
Function:
50%
Set the duration of the DC braking current set
in par. 2-01, once activated.
2-03 DC Brake Cut-In Speed
Range:
0 - par. 4-13 RPM
Function:
Set the DC brake cut-in speed for activation
of the DC braking current set in par. 2-01,
upon a stop command.
2-1* Brake Energy Funct.
"
Parameter group for selecting dynamic
braking parameters.
2-10 Brake Function
Option:
*
Off
Resistor brake
Function:
50% Select Off [0] if no brake resistor is installed.
Select Resistor brake [1] if a brake resistor is
incorporated in the system, for dissipation of
surplus brake energy as heat. Connecting a brake
resistor allows a higher DC link voltage during
braking (generating operation). The Resistor brake
function is only active in frequency converters
with an integral dynamic brake.
2-11 Brake Resistor (ohm)
Option:
Ohm
Function:
Set the brake resistor value in Ohms. This value
is used for monitoring the power to the brake
resistor in par. 2-13 Brake Power Monitoring. This
*
10.0s.
*
0RPM
[0]
[1]
Dependson unit size.
173