Danfoss VLT AutomationDrive FC 300 Series Programming Manual page 44

Parameter Descriptions
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 [ 0.0001 - Needed for average inertia calculation.
related par. 1-69 Enter the minimum moment of inertia
*
kgm²] 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 [ par. 1-68 - Active in Flux Open Loop only.
related 0.4800 kgm²] 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.
®
VLT AutomationDrive Programmming Guide
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
selections will estimate the speed and angle. Active for PM
motors in VVC
Option:
[0]
[1]
1-71 Start Delay
Range:
0.0 s
1-72 Start Function
Option:
[0]
[1]
[2]
*
[3]
®
MG33ME02 - VLT is a registered Danfoss trademark
plus
control core for previously free running PM motor. Both
plus
only.
Function:
Rotor Detection Estimates the electrical angle
of the rotor and uses this as a
starting point. Standard
selection for AutomationDrive
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:
[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.
Function:
Select the start function during start delay.
This parameter is linked to 1-71 Start Delay.
DC Hold/ Energizes motor with a DC holding current
delay time (2-00 DC Hold Current) during the start delay
time.
DC Brake/ Energizes motor with a DC braking current
delay time (2-01 DC Brake Current) during the start delay
time.
Coast/delay Motor coasted during the start delay time
time (inverter off).
Start speed
Only possible with VVC
cw
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,
3
plus
.
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