Danfoss VLT AutomationDrive FC 301 Programming Manual page 71

Parameter Descriptions
NOTICE
This function is not recommended for hoisting
applications.
For power levels above 55 kW, flux mode must be used
to achieve the best performance.
NOTICE
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.
1-73 Flying Start
Option: Function:
NOTICE
This block is available only
with software version 8.XX.
This function makes it possible to
catch a freely spinning motor, for
example coasted because of mains
dropout.
When flying start is enabled,
parameter 1-71 Start Delay and
parameter 1-72 Start Function have
no function.
When options [1] and [2] are
enabled, parameter 1-58 Flying Start
Test Pulses Current and
parameter 1-59 Flying Start Test
Pulses Frequency are used to specify
conditions for flying start.
For flying start version 1, options [3]
and [4] 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] is specific to
asynchronous motor (induction
motor) in VVC+ upto 132 Hz output
frequency. These options provides a
more fast, reliable, and robust flying
start, especially for high power
motors (>250 kW).
[0] Disabled No function
[1] Enabled Enables frequency converter to
catch and control a spinning motor.
[2] Enabled
Always
[3] Enabled Ref.
Dir.
M0013101
Programming Guide
1-73 Flying Start
Option:
[4]
[11]
[12]
[13]
[14]
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 search in clockwise direction. If
not successful, a DC brake is carried out.
[2] Both Directions: The flying start first searches in the
direction determined by the last reference (direction). If
not finding the spee, it 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.
1-74 Start Speed [RPM]
Range:
Size
related
*
1-75 Start Speed [Hz]
Range:
Size
related
*
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Function:
Enab. Always
Ref. Dir.
v2 Enabled Enable flying start version 2, after
coast.
v2 Enabled Enable flying start version 2, at
Always every start.
v2 Enabled Enable flying start version 2, after
Ref. Dir. coast, search in reference direction
only.
v2 Enab. Alw. Enable flying start version 2, ok at
Ref. Dir. every start, search in reference
direction only.
Function:
[0 - 600 Set a motor start speed. After the
RPM] start signal, the output speed leaps
to set value. Set the start function
in parameter 1-72 Start Function to
[3] Start speed cw, [4] Horizontal
operation, or [5] VVC
clockwise, and set a start delay time
in parameter 1-71 Start Delay.
Function:
[ 0 - 500.0 This parameter can be used for
Hz] hoist applications (cone rotor). Set a
motor start speed. After the start
signal, the output speed leaps to
the set value. Set the start function
in parameter 1-72 Start Function to
[3] Start speed cw, [4] Horizontal
operation, or [5] VVC
and set a start delay time in
parameter 1-71 Start Delay.
3 3
+
/Flux
+
/Flux clockwise,
69