Danfoss VLT AutomationDrive FC 360 Programming Manual page 44

Parameter Descriptions
1-72 Start Function
Option:
[4] Horizontal
operation
4 4
[5] VVC+
clockwise
1-73 Flying Start
Option:
[0] Disabled
*
[1] Enabled
[2] Enabled
Always
[3] Enabled
Ref. Dir.
[4] Enab.
Always Ref.
Dir.
42
VLT
Function:
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 1-75 Start Speed [Hz] and
parameter 1-76 Start Current during the start
delay time. The motor rotates in the reference
direction. If the reference signal equals zero (0),
parameter 1-75 Start Speed [Hz] is ignored and
the output speed equals zero (0). The output
current corresponds to the setting of the start
current in parameter 1-76 Start Current.
The start speed is calculated automatically. This
function uses the start speed in the start delay
time only.
Function:
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.
Catch a motor which is spinning freely due to
a mains dropout.
No function.
Enable 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.
Enable flying start at every start command.
Enable the frequency converter to catch and
control a spinning motor. The search is
performed only in the reference direction.
Enable flying start at every start command. The
search is performed only in the reference
direction.
Danfoss A/S © 06/2017 All rights reserved.
®
AutomationDrive FC 360
1-75 Start Speed [Hz]
Range:
Size
related 500.0
*
Hz]
1-76 Start Current
Range:
Size
related 1000 A]
*
1-78 Compressor Start Max Speed [Hz]
Range:
0 Hz [ 0 -
*
500 Hz]
1-79 Compressor Start Max Time to Trip
Range:
5 s [0 -
*
10 s]
Function:
[ 0 - This parameter can be used for 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 + clockwise, and set a start delay time
in parameter 1-71 Start Delay.
Function:
[ 0 - Some motors, for example cone rotor
motors, need extra current/starting speed to
disengage the rotor. To obtain this boost, set
the required current in this parameter. 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.
Function:
This parameter enables high starting torque. This
function ignores current limit and torque limit
during start of the motor. The time from the start
signal is given until the speed exceeds the speed
set in this parameter becomes a start zone. In
the start zone, the current limit and motoric
torque limit are set to the maximum possible
value for the frequency converter/motor
combination. The time without protection from
the current limit and torque limit must not
exceed the value set in
parameter 1-79 Compressor Start Max Time to Trip.
Otherwise, the frequency converter trips with
alarm 18, Start Failed.
Function:
The time from the start signal is given until the
speed exceeds the speed set in
parameter 1-78 Compressor Start Max Speed [Hz]
must not exceed the time set in this parameter.
Otherwise, the frequency converter trips with alarm
18, Start Failed. Any time set in parameter 1-71 Start
Delay for use of a start function must be executed
within the time limit.
MG06C702