Adv. Mech. Brake - Danfoss VLT AutomationDrive FC 301 Programming Manual

Programming Guide | VLT® AutomationDrive FC 301/FC 302
Monitoring of mechanical braking feedback throughout the complete cycle. This helps protect the mechanical brake, especially if
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more drives are connected to the same shaft.
No ramp-up until feedback confirms that mechanical brake is open.
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Improved load control at stop. If the value of parameter 2-23 Activate Brake Delay is too low, Warning 22, Hoist mech. brake is
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activated and the torque is not allowed to ramp down.
The transition when motor takes over the load from the brake can be configured. Parameter 2-28 Gain Boost Factor can be increased
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to minimize the movement. To achieve smooth transition, change the setting from the speed control to the position control during
the changeover.
Set parameter 2-28 Gain Boost Factor to 0 to enable position control during parameter 2-02 DC Braking Time. This enables
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parameter 2-30 Position P Start Proportional Gain to parameter 2-33 Speed PID Start Lowpass Filter Time, which are PID parameters
for the position control.
Torque Ramp
Up Time
Torque ref. p. 2-26
Motor
speed
W22
Active
High
Low
High
Low
Torque
ref.
Open
Closed
Gain Boost p. 2-28
Brake
relay
Figure 49: Brake Release Sequence for Hoist Mechanical Brake Control
Parameter 2-26 Torque Ref to parameter 2-33 Speed PID Start Lowpass Filter Time are only available for the hoist mechanical brake
control (flux with motor feedback).
6.4.5

2-3* Adv. Mech. Brake

Parameter 2-30 Position P Start Proportional Gain to parameter 2-33 Speed PID Start Lowpass Filter Time can be set up for very
smooth transition change from speed control to position control during parameter 2-25 Brake Release Time - the time when the load is
transferred from the mechanical brake to the drive. Parameter 2-30 Position P Start Proportional Gain to parameter 2-33 Speed PID Start
Lowpass Filter Time are activated when parameter 2-28 Gain Boost Factor is set to 0.
2-30 Position P Start Proportional Gain
Default value: 0.0500
Setup:
All setups
142 | © 2024.09
Brake Release Ramp 1 Up
Time P. 3-41
p. 2-27 p. 2-25
Contact no. 1
Stop Delay
Ramp 1 Down
P. 3-42 P. 2-24
A22 A22
Active Active
Parameter type:
Conversion index:
Parameter Descriptions
Activate Brake Torque Ramp
Delay Down Time
P. 2-23 p. 2-29
W22
Active
Range, 0.000 - 1.000
-4
AU275636650261en-003201 / 130R0334