Danfoss VLT AutomationDrive FC 302 Programming Manual page 51

Parameter Descriptions
3.3.8 1-7* Start Adjustments
1-70 PM Start Mode
Select the PM motor start-up mode. This is done to initialise the
plus
VVC control core for previously free running PM motor. Both
selections estimate the speed and angle. Active for PM motors in
plus
VVC only.
Option:
[0] Rotor Detection
*
[1] Parking
1-71 Start Delay
Range: Function:
0 s [0 - 25.5 s] This parameter refers to the start function
*
selected in parameter 1-72 Start Function.
Enter the time delay required before
commencing acceleration.
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/ Energises motor with a DC holding current
delay time (parameter 2-00 DC Hold Current) during the
start delay time.
[1] DC Brake/ Energises motor with a DC braking current
delay time (parameter 2-01 DC Brake Current) during the
start delay time.
[2] Coast/delay Motor coasted during the start delay time
time (inverter off).
*
[3] Start speed
Only possible with VVC
cw
Connect the function described in
parameter 1-74 Start Speed [RPM] and
parameter 1-76 Start Current in the start delay
time.
Regardless of the value applied by the
reference signal, the output speed applies the
setting of the start speed in
parameter 1-74 Start Speed [RPM] or
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
®
VLT AutomationDrive FC 301/302 Programming Guide
Function:
Estimates the electrical angle of
the rotor and uses this as a
starting point. Standard
selection for AutomationDrive
applications.
The Parking function applies
DC current across the stator
winding and rotates the rotor
to electrical zero position
(typically selected for HVAC
applications).
plus .
MG33MI02 - Rev. 2013-11-20
1-72 Start Function
Option: Function:
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
Only possible with VVC
operation
For obtaining the function described in
parameter 1-74 Start Speed [RPM] 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 1-74 Start Speed [RPM] is ignored
and the output speed equals zero (0). The
output current corresponds to the setting of
the start current in parameter 1-76 Start
Current.
[5] VVC+/Flux For the function described in
clockwise parameter 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
parameter 1-74 Start Speed [RPM]. [3] Start
speed/current clockwise and [5] VVC
clockwise are typically used in hoisting
applications. [4] Start speed/current in reference
direction is particularly used in applications
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
3
plus
.
plus /Flux
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