Parameter Group 2-** Brakes; Dc Brakes - Danfoss VLT FC 102 Programming Manual

Programming Guide | VLT® HVAC Drive FC 102

Parameter Group 2-** Brakes

6.4

2-0* DC Brakes

6.4.1
Parameter group for configuring the DC brake and DC hold functions.
2-00 DC Hold Current
Default value:
50%
Setup: All setups
Data type:
Uint8
The maximum value depends on the rated motor current. Avoid 100% current for too long. It may damage the motor. In VVC+
control core, low values (<20%) of DC hold may result in wrong currents with larger motor sizes (>90 kW) and should be avoided.
In cases when low DC hold currents with larger motors are required, select Flux control core to ensure the right currents.
Enter a value for holding current as a percentage of the rated motor current I
current corresponds to I . This parameter holds the motor function (holding torque) or preheats the motor. This parameter is active if
M,N
DC hold is selected in parameter 1-72 Start Function [0] or parameter 1-80 Function at Stop [1].
2-01 DC Brake Current
Default value: 50%
Setup: All setups
Data type: Uint16
The maximum value depends on the rated motor current. Avoid 100% current for too long. It may damage the motor.
Enter a value for current as a percentage of the rated motor current I
corresponds to I . DC brake current is applied on a stop command, when the speed is lower than the limit set in parameter 2-03 DC
M,N
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.
2-02 DC Braking Time
Default value: 10 s
Setup: All setups
Data type: Uint16
Set the duration of the DC brake current set in parameter 2-01 DC Brake Current, once activated.
2-03 DC Brake Cut In Speed [RPM]
Default value:
Size related
Setup: All setups
Data type:
Uint16
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Parameter type:
Conversion index:
Change during operation:
NOTICE
set in parameter 1-24 Motor Current. 100% DC hold
M,N
Parameter type:
Conversion index:
Change during operation:
NOTICE
, see parameter 1-24 Motor Current. 100% DC brake current
M,N
Parameter type:
Conversion index:
Change during operation:
Parameter type:
Conversion index:
Change during operation:
Parameter Descriptions
Range, 0 - 160%
0
True
Range, 0 - 1000%
0
True
Range, 0 - 60 s
-1
True
Range, 0 - 0 RPM
67
True
AU430028034214en-001901 / 130R0310