Danfoss VLT AutomationDrive FC 301 Programming Manual page 70

Parameter Descriptions
1-72 Start Function
Option:
[0] DC Hold/delay
time
3 3
[1] DC Brake/
delay time
[2] Coast/delay
*
time
[3] Start speed
cw
[4] Horizontal
operation
[5] VVC+/Flux
clockwise
68
®
VLT AutomationDrive FC 301/302
Function:
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]
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1-72 Start Function
Option: Function:
VVC
used in hoisting applications. [4]
Start speed/current in reference
direction is particularly used in
applications with counterweight
and horizontal movement.
[6] Hoist Mech. For utilizing mechanical brake
Brake Rel 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.
[7] VVC+/Flux
counter-cw
1-73 Flying Start
Option: Function:
NOTICE
This parameter cannot be
adjusted while the motor is
running. This block is available
only with software version
48.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.
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.
[0] Disabled No function.
[1] Enabled Enable after coast.
[2] Enabled Enable at every start.
Always
[3] Enabled Ref. Enable after coast, search in
Dir. reference direction only.
[4] Enab. Always Enable at every start, search in
Ref. Dir. reference direction only.
+
/Flux clockwise are typically
M0013101