3.3 Parameters: Load and Motor
3.3.1 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 constant 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
. FC 302 only.
[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*.
[4] Torque open loop
Enables the use of torque open loop in VVC
+
mode (par. 1-01
Motor Control Principle
). The torque
PID parameters are set in par. group 7-1*.
[5] Wobble Enables the wobble functionality in par. 30-00
Wobble Mode
to par. 30-19
Wobble Delta Freq.
Scaled
.
[6] Surface Winder Enables the surface winder control specific parameters in par. group 7-2* and 7-3*.
[7] Extended PID Speed OL Specific parameters in par. group 7-2* to 7-5*.
[8] Extended PID Speed CL Specific parameters in par. group 7-2* to 7-5*.
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 se-
lected the characteristic of the control principle can be edited in par. 1-55
U/f Characteristic - U
and
par. 1-56
U/f Characteristic - F
.
[1] VVC+
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 Flux Vector control without encoder feedback, for simple installation and robustness against sudden
load changes. FC 302 only.
[3] Flux w/ motor feedb very high accuracy speed and torque control, suitable for the most demanding applications. FC 302
only.
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.
FC 300 Programming Guide 3 Parameter descriptions
MG.33.M8.02 - VLT
®
is a registered Danfoss trademark
45
3
To Next Page
Loading...
Need help?
General