Danfoss VLT AutomationDrive FC 301 Programming Manual page 47

Parameter Descriptions
1-66 Min. Current at Low Speed
Range: Function:
parameter with the highest value adjusts
1-66 Min. Current at Low Speed. The current
setting in 1-66 Min. Current at Low Speed is
composed of the torque generating current
and the magnetising current.
Example: Set 4-16 Torque Limit Motor Mode to
100% and set 4-17 Torque Limit Generator Mode
to 60%. 1-66 Min. Current at Low Speed
automatically adjusts to about 127%,
depending on the motor size.
FC 302 only.
This parameter is valid for FC 302 only.
1-67 Load Type
Option: Function:
[0] Passive For conveyers, fan and pump applications.
*
load
[1] Active For hoisting applications, used in slip compen-
load sation at low speed. When [1] Active Load is
selected, set 1-66 Min. Current at Low Speed to
a level which corresponds to maximum torque.
1-68 Minimum Inertia
Range: Function:
NOTICE
Size [ 0.0001 -
related par. 1-69
*
This parameter cannot be adjusted
kgm²]
while motor is running.
Needed for average inertia calculation.
Enter the minimum moment of inertia of
the mechanical system. 1-68 Minimum
Inertia and 1-69 Maximum Inertia are used
for pre-adjustment of the Proportional
Gain in the speed control, see
30-83 Speed PID Proportional Gain.
FC 302 only.
1-69 Maximum Inertia
Range: Function:
NOTICE
Size [ par.
related 1-68 -
*
This parameter cannot be
0.4800
adjusted while motor is running.
kgm²]
Active in Flux Open Loop only. Used to
compute the acceleration torque at low
speed. Used in the torque limit
controller.
FC 302 only.
®
VLT AutomationDrive FC 301/302 Programming Guide
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
selections estimate the speed and angle. Active for PM motors in
VVC plus
Option:
[0]
*
[1]
1-71 Start Delay
Range:
0 s [0 - 25.5 s] This parameter refers to the start function
*
1-72 Start Function
Option:
[0] DC Hold/
delay time
[1] DC Brake/
delay time
[2] Coast/delay
time
*
[3] Start speed
cw
MG33MH02 - Rev. 2013-09-30
control core for previously free running PM motor. Both
only.
Function:
Rotor Estimates the electrical angle of the
Detection rotor and uses this as a starting
point. Standard selection for Automa-
tionDrive applications.
Parking The Parking function applies DC
current across the stator winding and
rotates the rotor to electrical zero
position (typically selected for HVAC
applications).
Function:
selected in 1-72 Start Function.
Enter the time delay required before
commencing acceleration.
Function:
Select the start function during start delay.
This parameter is linked to 1-71 Start Delay.
Energises motor with a DC holding current
(2-00 DC Hold Current) during the start delay
time.
Energises motor with a DC braking current
(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 1-74 Start
Speed [RPM] and 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 1-74 Start
Speed [RPM] or 1-75 Start Speed [Hz] and the
output current corresponds to the setting of
the start current in 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.
3
plus
.
45
3