1-66 Min. Current at Low Speed
Range: Function:
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.
100
%*
[Application
dependant]
1-67 Load Type
Option: Function:
[0] * Passive load For conveyers, fan and pump applications.
[1] Active load For hoisting applications, used in slip
compensation at low speed. When Active Load
[1] is selected, set 1-66 Min. Current at Low
Speed to a level which corresponds to
maximum torque.
FC 302 only.
1-68 Minimum Inertia
Range: Function:
Size
related*
[ 0.0001 -
par. 1-69
kgm²]
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.
This parameter cannot be adjusted while motor is running.
1-69 Maximum Inertia
Range: Function:
Size
related*
[ par. 1-68 -
0.4800 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.
This parameter cannot be adjusted while motor is running.
3.3.7
1-7* Start Adjustments
1-70 PM Start Mode
Select the PM motor start-up mode. This is done to initialize the
VVC
plus
control core for previously free running PM motor. Both
selections will estimate the speed and angle. Active for PM
motors in VVC
plus
only.
Option: Function:
[0] Rotor Detection Estimates the electrical angle
of the rotor and uses this as a
starting point. Standard
selection for AutomationDrive
applications.
[1] Parking The Parking function applies
DC current across the stator
winding and rotates the rotor
to electrical zero position
(typically selected for HVAC
applications).
1-71 Start Delay
Range: Function:
0.0 s* [0.0 - 25.5 s] This parameter refers to the start function
selected in 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 1-71 Start Delay.
[0] DC Hold/
delay time
Energizes motor with a DC holding current
(2-00 DC Hold Current) during the start delay
time.
[1] DC Brake/
delay time
Energizes motor with a DC braking current
(2-01 DC Brake 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
plus
.
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,
Parameter Descriptions
VLT
®
AutomationDrive Programmming Guide
MG33ME02 - VLT
®
is a registered Danfoss trademark 43
3
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