Danfoss VLT AutomationDrive FC 302 Programming Manual page 53

Parameter Descriptions
1-72 Start Function
Option: Function:
with counterweight and horizontal movement.
[6] Hoist Mech. For utilising mechanical brake control
Brake Rel functions (parameter 2-24 Stop Delay to
parameter 2-28 Gain Boost Factor). This
parameter is only active when
parameter 1-01 Motor Control Principle is set to
[3] Flux w/ motor feedback (FC 302 only).
[7] VVC+/Flux
counter-cw
1-73 Flying Start
Option: Function:
NOTICE
This parameter cannot be adjusted
while the motor is running.
This function makes it possible to catch a
motor which is spinning freely due to a mains
drop-out.
[0] Disabled No function
[1] Enabled Enables the frequency converter to catch and
control a spinning motor.
When parameter 1-73 Flying Start is enabled,
parameter 1-71 Start Delay and
parameter 1-72 Start Function have no
function.
[2] Enabled
Always
[3] Enabled Ref.
Dir.
[4] Enab. Always
Ref. Dir.
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.
1-74 Start Speed [RPM]
Range: Function:
Size [0 - Set a motor start speed. After the start
related 600 signal, the output speed leaps to set value.
*
RPM] Set the start function in
parameter 1-72 Start Function to [3] Start
MG33MJ02
Programming Guide
1-74 Start Speed [RPM]
Range:
1-75 Start Speed [Hz]
Range:
Size
related
*
1-76 Start Current
Range:
0 [ 0 -
A par.
*
1-24 A]
3.3.11 1-8* Stop Adjustments
1-80 Function at Stop
Option:
[0] Coast
*
[1] DC hold
[2] Motor check
[3] Pre-
magnetizing
Danfoss A/S © Rev. 10/2014 All rights reserved.
Function:
speed cw, [4] Horizontal operation or [5]
plus
VVC /Flux clockwise, and set a start delay
time in parameter 1-71 Start Delay.
Function:
[ 0 - This parameter can be used for hoist
500.0 applications (cone rotor). Set a motor start
Hz] speed. After the 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
plus
[5] VVC /Flux clockwise, and set a start
delay time in parameter 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
parameter 1-76 Start Current. Set
parameter 1-74 Start Speed [RPM]. Set
parameter 1-72 Start Function to [3] Start speed cw
or [4] Horizontal operation, and set a start delay
time in parameter 1-71 Start Delay.
This parameter can be used for hoist applications
(cone rotor).
Function:
Select the frequency converter function
after a stop command or after the speed is
ramped down to the settings in
parameter 1-81 Min Speed for Function at
Stop [RPM].
Leaves motor in free mode. The motor is
disconnected from the frequency converter.
Energises motor with a DC holding current
(see parameter 2-00 DC Hold Current).
Checks if a motor has been connected.
Builds up a magnetic field while the motor
is stopped. This allows the motor to
produce torque quickly at subsequent start
commands (asynchronous motors only). This
pre-magnetising function does not help the
very first start command. 2 different
solutions are available to pre-magnetise the
machine for the first start command:
3 3
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