Danfoss VLT Automation Drive FC 360, Programming Manual

Page: 36 / 156

4.2.8 1-7* Start Adjustments
Parameters for adjusting the motor start settings.
1-70 PM Start Mode
Select the PM motor start-up mode. This is done to initialise 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
AutomationDrive applications. If flystart
detects that motor is running at low
speed or is 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 zero position. This
option is typically for pump and fan
applications. If flystart detects that motor
is running at low speed or is 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
Energises motor with a DC hold current
(
parameter 2-00 DC Hold/Motor Preheat Current )
during the start delay time.
[2]
*
Coast/delay
time Motor coasted during the start delay time
(inverter off).
[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
1-72 Start Function
Option: Function:
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.
[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 flying 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 flying 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 flying start at every start command.
The searching is performed only in the
reference direction.
Parameter Descriptions
VLT
®
AutomationDrive FC 360
34 Danfoss A/S © 7/2015 All rights reserved. MG06C602
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