Hoist Mechanical Brake - Danfoss VLT AutomationDrive FC 301 Programming Manual

Programming Guide | VLT® AutomationDrive FC 301/FC 302
Setup: All setups
Data type: Uint16
This value defines the time it takes for the mechanical brake to open. This parameter must act as a timeout when brake feedback is
activated.
2-26 Torque Ref
Default value:
0%
Setup: All setups
Data type:
Int16
The value defines the torque applied against the closed mechanical brake before release. The torque/load on a crane is positive and is
10–160%. To obtain the best starting point, set parameter 2-26 Torque Ref to approximately 70%. The torque/load on a lift can be both
positive and negative and between -160% and +160%. To obtain the best starting point, set parameter 2-26 Torque Ref to 0%. The higher
the torque error is (parameter 2-26 Torque Ref vs. actual torque), the more movement during load takeover.
2-27 Torque Ramp Up Time
Default value: 0.2 s
Setup: All setups
Data type: Uint8
The value defines the duration of the torque ramp in clockwise direction. Value 0 enables very fast magnetization in flux control
principle.
2-28 Gain Boost Factor
Default value: 1
Setup:
All setups
Data type: Uint16
Only active in flux closed loop. The function ensures a smooth transition from torque control mode to speed control mode when the
motor takes over the load from the brake. Increase to minimize the movement. Activate the advanced mechanical braking (parameter
group 2-3* Adv. Mech Brake) by setting parameter 2-28 Gain Boost Factor to 0.
2-29 Torque Ramp Down Time
Default value:
0 s
Setup: All setups
Data type: Uint8
Torque ramp-down time.
6.4.4

Hoist Mechanical Brake

The hoist mechanical brake control supports the following functions:
2 channels for mechanical braking feedback to offer further protection against unintended behavior resulting from broken cable.
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AU275636650261en-003201 / 130R0334 |
Parameter Descriptions
-2
True
Range, -300 - 300%
-2
True
Range, 0 - 5 s
-1
True
Range, 0 - 4
-2
True
Range, 0 - 5 s
-1
True
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