Danfoss VLT AutomationDrive FC 301 Programming Manual page 97

VLT AutomationDrive FC 301/302
Programming Guide
Op- Name Description
tion
tions. [4] Start speed/current in reference direction is particularly used in applications with counterweight
and horizontal movement.
[6] Hoist mech.
For utilizing mechanical brake control functions (parameter 2-24 Stop Delay to parameter 2-28 Gain Boost
brake rel
Factor). This parameter is only active in flux control principle, in a mode with motor feedback or sensor-
less mode.
+
[7] VVC /flux Same function as in [5] VVC+/flux clockwise but running in the opposite direction.
counter-cw
Flying start function
When flying start is enabled, parameter 1-71 Start Delay and parameter 1-72 Start Function have no function. When options [1] Enable
and [2] Enabled always are enabled, parameter 1-58 Flying Start Test Pulses Current and parameter 1-59 Flying Start Test Pulses Frequen-
cy are used to specify conditions for flying start. For flying start version 1, options [3] Enabled ref. dir. and [4] Enab. always ref. dir. are
set to search for the motor in the reference direction only, which allows a faster execution of the motor catch. For flying start version
2, options [11] to [14] are specific to asynchronous motor (induction motor) in VVC+ up to 132 Hz output frequency. These options
provide a faster, more reliable, and robust flying start. When parameter 1-73 Flying Start is enabled, parameter 1-71 Start Delay has no
function.
Parameter 1-73 Flying Start
Table 124: Parameter 1-73 Flying Start
1-73 Flying Start
Default value: [0] Disabled
Conversion index: –
This function is not recommended for hoisting applications. For power levels above 55 kW, flux mode must be used to achieve
the best performance.
To obtain the best flying start performance, the advanced motor data, parameter 1-30 Stator Resistance (Rs) to parameter 1-35
Main Reactance (Xh), must be correct.
This function makes it possible to catch a freely spinning motor, for example coasted because of mains dropout. When parameter
1-73 Flying Start is enabled, parameter 1-71 Start Delay has no function. Search direction for flying start is linked to the setting in
parameter 4-10 Motor Speed Direction. [0] Clockwise: Flying start searches in clockwise direction. If not successful, a DC brake is car-
ried out. [2] Both Directions: The flying start first searches in the direction determined by the last reference (direction). If the speed is
not found, flying start searches in the other direction. If not successful, a DC brake activates in the time set in parameter 2-02 DC
Braking Time. Start then takes place from 0 Hz.
Option Name
[0]* Disabled
[1] Enabled
[2] Enabled always
[3] Enabled ref. dir.
[4] Enab. always ref. dir.
[11] v2 Enabled
Danfoss A/S © 2022.12
Parameter type: Option
Data type: Uint8
N O T I C E
N O T I C E
Description
No function.
Enable after coast.
Enable at every start.
Enable after coast, search in reference direction only.
Enable at every start, search in reference direction only.
Enable flying start version 2, after coast.
Parameter Descriptions
Setup: All setups
Change during operation: False
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