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Parameter 2-27 Torque Ramp Up Time
Table 169: Parameter 2-27 Torque Ramp Up Time
2-27 Torque Ramp Up Time
Default value:0.2 s
Parameter type: Range, 0 - 5 s
Setup: All setups
Conversion index: -1
Data type: Uint8
Change during operation: True
The value defines the duration of the torque ramp in clockwise direction. Value 0 enables very fast magnetization in flux control
principle.
Parameter 2-28 Gain Boost Factor
Table 170: Parameter 2-28 Gain Boost Factor
2-28 Gain Boost Factor
Default value:1
Parameter type: Range, 0 - 4
Setup: All setups
Conversion index: -2
Data type: Uint16
Change during operation: True
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.
Parameter 2-29 Torque Ramp Down Time
Table 171: Parameter 2-29 Torque Ramp Down Time
2-29 Torque Ramp Down Time
Default value:0 s
Parameter type: Range, 0 - 5 s
Setup: All setups
Conversion index: -1
Data type: Uint8
Change during operation: True
Torque ramp-down time.
4.3.3.1 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 ca-
ble.
Monitoring of mechanical braking feedback throughout the complete cycle. This helps protect the mechanical brake, especially
if more drives are connected to the same shaft.
No ramp-up until feedback confirms that mechanical brake is open.
Improved load control at stop. If the value of
parameter 2-23 Activate Brake Delay
is too low, Warning 22 Hoist mech. brake is
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 in-
creased 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
param-
eter 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.
AU373327181955en-000101 / 130R1208 | 105
Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide
