2-23 Activate Brake Delay
Range: Function:
0.0 s
*
[0.0 - 5.0
s]
Enter the brake delay time of the coast after
ramp-down time. The shaft is held at zero speed
with full holding torque. Ensure that the
mechanical brake has locked the load before the
motor enters coast mode. See the Mechanical
Brake Control section in the Design Guide.
2-24 Stop Delay
Range: Function:
0.0 s
*
[0.0 - 5.0 s] Set the time interval from the moment when
the motor is stopped until the brake closes.
This parameter is a part of the stopping
function.
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 timeout 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.
Figure 3.5 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
MG.33.MA.22 - VLT
®
is a registered Danfoss trademark 3-31
3
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