Danfoss VLT AutomationDrive FC 301 Programming Manual page 51

Parameter Descriptions
1-67 Load Type
This parameter is valid for FC 302 only.
Option: Function:
parameter 1-66 Min. Current at Low Speed to a
level which corresponds to maximum torque.
1-68 Minimum Inertia
Range: Function:
NOTICE
0.0048 [0.0001 -
kgm² par. 1-69
*
This parameter cannot be adjusted
kgm²]
while motor is running.
Needed for average inertia calculation. Enter
the minimum inertia moment of the
mechanical system. Parameter 1-68 Minimum
Inertia and parameter 1-69 Maximum Inertia
are used for pre-adjustment of the Propor-
tional Gain in the speed control, see
parameter 30-83 Speed PID Proportional Gain.
FC 302 only.
1-69 Maximum Inertia
Range:
0.0048 kgm² [par. 1-68 - 0.4800 kgm²]
*
3.2.10 1-7* Start Adjustments
1-70 Start Mode
Select the start-up mode. This is done to initialize the VVC
control core for previously free-running motor. Both selections
estimate the speed and angle. Active for PM and SynRM motors
+
in VVC only.
Option: Function:
[0] Rotor Detection Estimates the electrical angle of the
*
rotor and uses this as a starting point.
Standard selection for VLT
AutomationDrive applications.
[1] Parking The parking function applies DC current
across the stator winding and rotates
the rotor to electrical 0 position
(typically selected for HVAC
applications). Parking current and time
are configured in parameter 2-06 Parking
Current and parameter 2-07 Parking Time.
[2] Rotor Det. w/
Parking
1-71 Start Delay
Range: Function:
0.0 s [0.0 - 10.0 This parameter refers to the start function
*
s] selected in parameter 1-72 Start Function.
Enter the time delay required before
commencing acceleration.
MG33MO02
Programming Guide
1-72 Start Function
Option:
[0] DC Hold/
delay time
[1] DC Brake/
delay time
[2] Coast/delay
time
*
[3] Start speed
cw
Function:
+
[4] Horizontal
operation
®
[5] VVC+/Flux
clockwise
Danfoss A/S © 01/2018 All rights reserved.
Function:
Select the start function during start delay.
This parameter is linked to parameter 1-71 Start
Delay.
Energizes motor with a DC hold current
(parameter 2-00 DC Hold Current) during the
start delay time.
Energizes motor with a DC brake current
(parameter 2-01 DC Brake Current) during the
start delay time.
Motor coasted during the start delay time
(inverter off).
Only possible with VVC + .
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
applications without counterweight 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 1-74 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 0,
parameter 1-74 Start Speed [RPM] is ignored
and the output speed equals 0. The output
current corresponds to the setting of the start
current in parameter 1-76 Start Current.
For the function described in
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.
3 3
+ /Flux
49