Danfoss VLT AutomationDrive FC 301 Programming Manual page 116

Programming Guide | VLT® AutomationDrive FC 301/FC 302
Option Name
[0] DC hold/delay time
[1] DC brake/delay time
[2]* Coast/delay time
[3] Start speed cw
[4] Horizontal operation
[5]
VVC
[6] Hoist mech. brake rel
[7] VVC+/flux 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 1-59 Flying Start Test Pulses Frequency are used
to specify conditions for flying start. For flying start version 2, option [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.
116 | © 2024.09
+
/flux clockwise
Description
Energize the motor with a DC hold current (parameter 2-00 DC
Hold Current) during the start delay time.
Energize the motor with a DC brake current (parameter 2-01 DC
Brake Current) during the start delay time.
Motor coasted during the start delay time (inverter off ).
Only possible with VVC+. Connect the function described in
parameter 1-74 Start Speed [RPM] and parameter 1-76 Start
Current in the start delay time. Regardless of the value applied by
the reference signal, the output speed applies the setting of the
start speed in parameter 1-74 Start Speed [RPM] or parameter
1-75 Start Speed [Hz], and the output current corresponds to
the setting of the start current in parameter 1-76 Start Current.
This function is typically used in hoisting applications without
counterweight and especially in applications with a cone-motor
where the start is clockwise, followed by rotation in the reference
direction.
Only possible with VVC+. For obtaining the function described
in parameter 1-74 Start Speed [RPM] and parameter 1-76 Start
Current during the start delay time. The motor rotates in the
reference direction. If the reference signal equals 0, parameter
1-74 Start Speed [RPM] is ignored and the output speed equals 0.
The output current corresponds to the setting of the start current
in parameter 1-76 Start Current.
For the function described in parameter 1-74 Start Speed [RPM]
only. The start current is calculated automatically. This function
uses the start speed in the start delay time only. Regardless of
the value set by the reference signal, the output speed equals the
setting of the start speed in parameter 1-74 Start Speed [RPM].
[3] Start speed/current clockwise and [5] VVC+/Flux clockwise
are typically used in hoisting applications. [4] Start speed/current
in reference direction is particularly used in applications with
counterweight and horizontal movement.
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 sensorless mode.
Same function as in [5] VVC+/flux clockwise but running in the
opposite direction.
Parameter Descriptions
AU275636650261en-003201 / 130R0334