Danfoss VLT AutomationDrive FC 300 Programming Manual page 43

Parameter Descriptions
1-72 Start Function
Option:
3 3
[4] Horizontal
operation
[5] VVC+/Flux
clockwise
[6] Hoist Mech.
Brake Rel
[7] VVC+/Flux
counter-cw
1-73 Flying Start
Option:
[0] Disabled
*
[1] Enabled
[2] Enabled Always
[3] Enabled Ref. Dir.
[4] Enab. Always Ref.
Dir.
42
FC 300 Programming Guide
Function:
[RPM] or 1-75 Start Speed [Hz] and the output
current corresponds to the setting of the start
current in 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.
plus
Only possible with VVC .
For obtaining the function described in
1-74 Start Speed [RPM] and 1-76 Start Current
during the start delay time. The motor rotates
in the reference direction. If the reference
signal equals zero (0), 1-74 Start Speed [RPM] is
ignored and the output speed equals zero (0).
The output current corresponds to the setting
of the start current in 1-76 Start Current.
for the function described in 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 1-74 Start Speed [RPM].Start speed/
plus
current clockwise [3] and VVC /Flux clockwise
[5] are typically used in hoisting applications.
Start speed/current in reference direction [4] is
particularly used in applications with counter-
weight and horizontal movement.
For utilizing mechanical brake control
functions, 2-24 Stop Delay to 2-28 Gain Boost
Factor. This parameter is only active when
1-01 Motor Control Principle is set to [3] Flux w/
motor feedback (FC 302 only).
Function:
This function makes it possible to catch a
motor which is spinning freely due to a
mains drop-out.
No function
Enables the frequency converter to
"catch" and control a spinning motor.
When 1-73 Flying Start is enabled,
1-71 Start Delay and 1-72 Start Function
have no function.
MG.33.MB.02 - VLT
This parameter cannot be adjusted while motor is running.
NOTE
This function is not recommended for hoisting applications.
For power levels above 55kW, flux mode must be used to
achieve the best performance.
NOTE
To obtain the best flying start performance the advanced
motor data, parameters 1-30 through 1-35, must be correct.
1-74 Start Speed [RPM]
Range:
Application [0 - 600
dependent RPM]
*
1-75 Start Speed [Hz]
Range:
Application [Application
dependent dependant]
*
1-76 Start Current
Range:
0.00 [Application
A dependant]
*
3.3.8 1-8* Stop Adjustments
1-80 Function at Stop
Option:
Select the frequency converter function after
a stop command or after the speed is ramped
down to the settings in 1-81 Min Speed for
Function at Stop [RPM].
[0] Coast Leaves motor in free mode. The motor is
disconnected from the frequency converter.
*
®
is a registered Danfoss trademark
Function:
Set a motor start speed. After the
start signal, the output speed leaps
to set value. Set the start function in
1-72 Start Function to [3], [4] or [5],
and set a start delay time in 1-71 Start
Delay.
Function:
This parameter can be used for
hoist applications (cone rotor). Set
a motor start speed. After the start
signal, the output speed leaps to
set value. Set the start function in
1-72 Start Function to [3], [4] or [5],
and set a start delay time in
1-71 Start Delay.
Function:
Some motors, e.g. cone rotor motors,
need extra current/starting speed to
disengage the rotor. To obtain this boost,
set the required current in 1-76 Start
Current. Set 1-74 Start Speed [RPM]. Set
1-72 Start Function to [3] or [4], and set a
start delay time in 1-71 Start Delay.
This parameter can be used for hoist
applications (cone rotor).
Function: