Danfoss VLT AutomationDrive FC 300 Programming Guide

2-25 Brake Release Time
Range: Function:
0.20 s* [0.00 - 5.00 s] This value defines the time it takes for the mechanical brake to open. This parameter must act as
a time-out when brake feedback is activated.
2-26 Torque Ref
Range: Function:
0.00 %* [Application dependant] The value defines the torque applied against the closed mechanical brake, before release
2-27 Torque Ramp Time
Range: Function:
0.2 s* [0.0 - 5.0 s] The value defines the duration of the torque ramp in clockwise direction.
2-28 Gain Boost Factor
Range: Function:
1.00* [1.00 - 4.00 ] 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.
Illustration 3.4: Brake release sequence for hoist mechanical brake control
I)
Activate brake delay : The frequency converter starts again from the mechanical brake engaged position.
II)
Stop delay : When the time between successive starts is shorter than the setting in par. 2-24 Stop Delay , the frequency converter starts
without applying the mechanical brake (e.g. reversing).
3 Parameter descriptions FC 300 Programming Guide
70 MG.33.M8.02 - VLT
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3

Danfoss VLT AutomationDrive FC 300 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300
Category	DC Drives
Language	English