Danfoss VLT AutomationDrive FC 301 Programming Manual page 140

Programming Guide | VLT® AutomationDrive FC 301/FC 302
Set the motor current for release of the mechanical braking when a start condition is present. The default value is the maximum current
the inverter can provide for the particular power size. The upper limit is specified in parameter 16-37 Inv. Max. Current.
When mechanical brake control output is selected, but no mechanical braking is connected, the function does not work by
default setting due to too low motor current.
2-21 Activate Brake Speed [RPM]
Default value:
Size related
Conversion index: 67
Change during
True
operation:
Set the motor speed for activation of the mechanical braking when a stop condition is present.
2-22 Activate Brake Speed [Hz]
Default value: Size related
Setup:
All setups
Data type: Uint16
Set the motor frequency for activation of the mechanical braking when a stop condition is present.
2-23 Activate Brake Delay
Default value: 0 s
Setup: All setups
Data type: Uint8
Enter the brake delay time of the coast after ramp-down time. The shaft is held at 0 speed with full holding torque. Ensure that the
mechanical braking has locked the load before the motor enters coast mode. To adjust transition of the load to the mechanical braking,
set parameter 2-23 Activate Brake Delay and parameter 2-24 Stop Delay. Setting of brake delay parameters does not affect the torque.
The drive does not register that mechanical braking is holding the load. After setting parameter 2-23 Activate Brake Delay, the torque
drops to 0 after a few minutes. The sudden torque change leads to movement and noise.
2-24 Stop Delay
Default value:
0 s
Setup: All setups
Data type:
Uint8
Set the time interval from the moment when the motor is stopped until the brake closes. To adjust transition of the load to the
mechanical braking, set parameter 2-23 Activate Brake Delay and parameter 2-24 Stop Delay. This parameter is a part of the stop
function.
2-25 Brake Release Time
Default value: 0.20 s
140 | © 2024.09
NOTICE
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Parameter Descriptions
Range, 0 - par. 4-13 RPM
Uint16
Range, 0 - par. 4-14
-1
True
Range, 0 - 5 s
-1
True
Range, 0 - 5 s
-1
True
Range, 0 - 20 s
AU275636650261en-003201 / 130R0334