Danfoss VLT AutomationDrive FC 300 Programming Guide

Par. 1-66 Min. Current at Low Speed is enabled when par. 1-00 Configuration Mode = Speed open
loop
[0] only. The frequency converter runs with constant current through motor for speeds below
10 Hz.
For speeds above 10 Hz, the motor flux model in the frequency converter controls the motor.
par. 4-16
Torque Limit Motor Mode and / or par. 4-17 Torque Limit Generator Mode automatically
adjust par. 1-66
Min. Current at Low Speed . The parameter with the highest value adjusts
par. 1-66
Min. Current at Low Speed . The current setting in par. 1-66 Min. Current at Low Speed is
composed of the torque generating current and the magnetizing current.
Example: Set par. 4-16
Torque Limit Motor Mode to 100% and set par. 4-17 Torque Limit Generator
Mode
to 60%. par. 1-66 Min. Current at Low Speed automatically adjusts to about 127%, depending
on the motor size.
This parameter is available for FC 302 only.
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 par. 1-66
Min. Current at Low Speed to a level which corresponds to maximum torque.
This parameter is available for FC 302 only.
1-68 Minimum Inertia
Range: Function:
Application
dependent*
[Application dependant] Needed for average inertia calculation. Enter the minimum moment of inertia of the mechanical
system. Par. 1-68
Minimum Inertia and par. 1-69 Maximum Inertia are used for pre-adjustment of
the Proportional Gain in the speed control, see par. 30-83
Speed PID Proportional Gain .
This parameter is available for FC 302 only.
This parameter cannot be adjusted while motor is running.
1-69 Maximum Inertia
Range: Function:
Application
dependent*
[Application dependant] Active in Flux Open Loop only. Used to compute the acceleration torque at low speed. Used in the
torque limit controller.
This parameter is available for FC 302 only.
This parameter cannot be adjusted while motor is running.
3.3.7 1-7* Start Adjustments
Parameters for setting special motor start features.
1-71 Start Delay
Range: Function:
0.0 s* [0.0 - 10.0 s] This parameter refers to the start function selected in par. 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 par. 1-71 Start Delay .
[0] DC Hold/delay time Energizes motor with a DC holding current (par. 2-00
DC Hold Current ) during the start delay time.
[1] DC Brake/delay time Energizes motor with a DC braking current (par. 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+.
3 Parameter descriptions FC 300 Programming Guide
56 MG.33.M8.02 - VLT
®
is a registered Danfoss trademark
3

Danfoss VLT AutomationDrive FC 300 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300
Category	DC Drives
Language	English