Parameters: Brakes - Danfoss VLT AutomationDrive FC 300 Design Manual

FC 300 Design Guide

Parameters: Brakes

"
2-0* DC-Brakes
"
Parameter group for setting brake features
in the frequency converter.
2-00 DC Hold Current
Range:
0 - 100%
Function:
Holds the motor function (holding torque) or
pre-heats the motor. You cannot use this parameter
if DC hold is selected in par. 1-72 [0] or par. 1-80
[1]. Set the Holding current as a percentage value in
relation to the rated motor current I
100% DC holding current corresponds to I
NB!:
The maximum value depends on the
rated motor current.
Avoid 100 % current for too long. It
may damage the motor.
2-01 DC Brake Current
Range:
0 - 100 %
Function:
Applies DC brake current on a stop command.
Activate the function by reaching the set speed
in par. 2-03, by activating the DC Brake Inverse
function on one of digital inputs, or via the serial
communication port. The braking current is
active during the time period set in par. 2-02.
Set the current as a percentage value of the
rated motor current I
braking current corresponds to I
NB!:
The maximum value depends on the
rated motor current.
Avoid 100 % current for too long. It
can damage the motor.
default setting ( )
*
How to Programme
*
(par. 1-24).
M,N
M,N
*
(par. 1-24). 100% DC
M,N
.
M,N
display text [ ] value for use in communication via serial communication port
MG.33.B4.02 - VLT is a registered Danfoss trademark
2-02 DC Braking Time
Range:
0.0 - 60.0 s.
Function:
Sets the active DC braking time for the DC
braking current (par. 2-01).
2-03 DC Brake Cut In Speed
50 %
Range:
0 - par. 4-13 RPM
Function:
Sets the active brake cut-in speed for the
DC braking current (par. 2-01) in connection
with a stop command.
.
2-1* Brake Energy Funct.
"
2-10 Brake Function
Option:
*
Off
Resistor brake
Function:
The default setting is Off [0].
Use Resistor brake [1] to programme the
frequency converter for connecting a brake resistor.
Connecting a brake resistor allows a higher DC link
voltage during braking (generating operation). The
Resistor brake [1] function is only active in frequency
50%
converters with an integral dynamic brake.
Select Resistor brake [1] if a brake resistor
is part of the system.
2-11 Brake Resistor (ohm)
Option:
Ohm
Function:
This parameter is only active in frequency
converters with an integral dynamic brake.
Set the brake resistor value in ohm. This value
is used for monitoring the power to the brake
resistor. Select this function in par. 2-13.
2-12 Brake Power Limit(kW)
Range:
0.001 - Variable Limit kW
Function:
This parameter is only active in frequency
converters with an integral dynamic brake.
*
10.0s.
*
0RPM
[0]
[1]
Dependsonunit size.
*
kW
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