Danfoss VLT AutomationDrive FC 300 Series Programming Guide

Op-
tion
Name
Description
tions. [4] Start speed/current in reference direction is particularly used in applications with counterweight
and horizontal movement.
[6]
Hoist mech.
brake rel
For utilizing mechanical brake control functions (parameter 2-24 Stop Delay to parameter 2-28 Gain Boost
Factor). This parameter is only active in flux control principle, in a mode with motor feedback or sensor-
less mode.
[7]
VVC
+
/flux
counter-cw
Same function as in [5] VVC+/flux clockwise but running in the opposite direction.
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
Parameter type: Option
Setup: All setups
Conversion index: –
Data type: Uint8
Change during operation: False
N O T I C E
This function is not recommended for hoisting applications. For power levels above 55 kW, flux mode must be used to achieve
the best performance.
N O T I C E
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
Description
[0]*
Disabled
No function.
[1]
Enabled
Enable after coast.
[2]
Enabled always
Enable at every start.
[3]
Enabled ref. dir.
Enable after coast, search in reference direction only.
[4]
Enab. always ref. dir.
Enable at every start, search in reference direction only.
[11]
v2 Enabled
Enable flying start version 2, after coast.
AU275636650261en-000101 / 130R0334 | 97Danfoss A/S © 2022.12
Parameter Descriptions
VLT AutomationDrive FC 301/302
Programming Guide

Danfoss VLT AutomationDrive FC 300 Series Specifications

General

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