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.
Mech.Brake
GainBoost
Relay
Torqueref.
MotorSpeed
Premag Torque Ramp
Time
p. 2-27
Torque Ref. 2-26
Gain Boost Factor
p. 2-28
Brake
Release
Time
p. 2-25
Ramp 1 upp. 3-41 Ramp 1 downp. 3-42 Stop
Delay
p. 2-24
Activate
Brake
Delay
p. 2-23
1 2 3
130BA642.12
II
I
Figure 3.8 Brake release sequence for hoist mechanical brake control
I) Activate brake delay: The Adjustable frequency drive starts again from the mechanical brake engaged position.
II) Stop delay: When the time between successive starts is shorter than the setting in 2-24 Stop Delay, the Adjustable frequency drive starts
without applying the mechanical brake (e.g., reversing).
Parameter Descriptions FC 300 Programming Guide
MG33MD22 - VLT
®
is a registered Danfoss trademark 3-33
3
3
Remote Site Products - 1-888-532-2706 - www.remotesiteproducts.com
http://www.remotesiteproducts.com/p-20872-Danfoss-131H4490-VLT-Automation-VT-Drive-VFD-FC302-460V-25-HP.aspx
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