Danfoss VLT Midi Drive FC 280

1-70 PM Start Mode
Select the PM motor start-up mode. To initialize the VVC
+
control
core for previously free-running PM motor. Active for PM motors
in VVC
+
only if the motor is stopped (or running at very low
speed).
Option: Function:
[0] * Rotor Detection Estimates the electrical angle of the rotor
and uses this angle as a starting point.
This option is the standard selection for
industrial applications. If ystart detects
that the motor runs at low speed or has
stopped, the frequency converter detects
the rotor position (the angle), and starts
the motor from that position.
[1] Parking The parking function applies DC current
across the stator winding and rotates the
rotor to electrical 0 position. This option is
typically for pump and fan applications. If
ystart detects that the motor runs at low
speed or has stopped, the frequency
converter sends out a DC current to make
the motor park at an angle and then start
the motor from that position.
1-71 Start Delay
Range: Function:
0 s* [0 - 10
s]
This parameter enables a delay of the starting
time. The frequency converter begins with the
start function selected in parameter 1-72 Start
Function. Set the start delay time until
acceleration is to begin.
1-72 Start Function
Option: Function:
Select the start function during start delay.
This parameter is linked to
parameter 1-71 Start Delay.
[0] DC Hold/
delay time
Energizes motor with a DC hold current
(parameter 2-00 DC Hold/Motor Preheat Current)
during the start delay time.
[1] DC-Brake/
delay time
[2]
*
Coast/delay
time
Motor coasted during the start delay time
(inverter o).
[3] Start speed
cw
Only possible with VVC
+
. Regardless of the
value applied by the reference signal, the
output speed applies the setting of the start
speed in 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-
1-72 Start Function
Option: Function:
motor, where the start is clockwise, followed
by rotation in the reference direction.
[4] Horizontal
operation
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.
[5] VVC+
clockwise
The start speed is calculated automatically.
This function uses the start speed in the start
delay time only.
1-73 Flying Start
Option: Function:
NOTICE
This parameter cannot be changed while
the motor is running.
NOTICE
To obtain the best ying start
performance, the advanced motor data,
parameter 1-30 Stator Resistance (Rs) to
parameter 1-35 Main Reactance (Xh) must
be correct.
Catches a motor which is spinning freely due
to a mains dropout.
[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
Enables ying start at every start command.
[3] Enabled
Ref. Dir.
Enables the frequency converter to catch and
control a spinning motor. The searching is
performed only in the reference direction.
[4] Enab.
Always Ref.
Dir.
Enables ying start at every start command.
The searching is performed only in the
reference direction.
Parameter Descriptions Programming Guide
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