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2.4. Parameters: Load and Motor
2.4.1. 1-0* General Settings
Define whether the frequency converter operates in speed mode or torque mode; and whether the internal PID control should be active or not.
1-00 Configuration Mode
Option:
Function:
Select the application control principle to be used when a Remote Reference (i.e. via analog input or fieldbus)
is active. A Remote Reference can only be active when par. 3-13
Reference Site
is set to [0] or [1].
[0]
Speed open loop
Enables speed control (without feedback signal from motor) with automatic slip compensation for almost con-
stant speed at varying loads.
Compensations are active but can be disabled in the Load/Motor par. group 1-0*.
[1]
Speed closed loop
Enables encoder feedback from motor. Obtain full holding torque at 0 RPM.
For increased speed accuracy, provide a feedback signal and set the speed PID control.
[2]
Torque
Connects the encoder speed feedback signal to the encoder input. Only possible with “Flux with motor feedback”
option, par. 1-01
Motor control principle
.
[3]
Process
Enables the use of process control in the frequency converter. The process control parameters are set in par.
groups 7-2* and 7-3*.
1-01 Motor Control Principle
Option:
Function:
Select which motor control principle to employ.
[0]
U/f
special motor mode, for parallel connected motors in special motor applications. When U/f is selected the char-
acteristic of the control principle can be edited in par. 1-55 and 1-56.
[1]
VVCplus
Voltage Vector Control principle suitable for most applications. The main benefit of VVC
plus
operation is that it
uses a robust motor model.
[2]
Flux sensorless (FC 302
only)
Flux Vector control without encoder feedback, for simple installation and robustness against sudden load
changes.
[3]
Flux w/ motor feedback
(FC 302 only)
very high accuracy speed and torque control, suitable for the most demanding applications.
The best shaft performance is normally achieved using either of the two Flux Vector control modes
Flux sensorless
[2] and
Flux with encoder feedback
[3].
This parameter cannot be adjusted while the motor is running.
1-02 Flux Motor Feedback Source
Option:
Function:
Select the interface at which to receive feedback from the motor.
[1]
*
24 V encoder
A and B channel encoder, which can be connected to the digital input terminals 32/33 only. Terminals 32/33
must be programmed to
No operation
.
[2]
MCB 102
Encoder module option which can be configured in par. group 17-1*
This parameter appears in FC 302 only.
[3]
MCB 103
Optional resolver interface module which can be configured in parameter group 17-5*
[4]
MCO 305 encoder 1
Encoder interface 1 of the optional programmable motion controller MCO 305.
[5]
MCO 305 encoder 2
encoder interface 2 of the optional programmable motion controller MCO 305.
This parameter cannot be adjusted while the motor is running.
FC 300 Programming Guide
2. How to Programme
MG.33.M3.02 - VLT
®
is a registered Danfoss trademark
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