Teknatool NOVA DVR XP - Speed Control Loop and PI Coefficients

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5.4 The Speed Control Loop. The PI Speed Control coefficients setting
The control system of the DVR Drive has Speed Control Loop which provides the PI speed controller
function. The KPror and KInt are the values of the Proportional and Integral coefficient of speed control
loop. They are functions of motor speed. See Appendix A for the basic curves of the PI speed controller
coefficients. There are three possible choices – Normal (default), Soft and Hard coefficient curves. The
values Kprop & Kint are multiplied by 100 (given as a percentage).
 Press
PROGRAM
P
(“Page”) to go to next display page in order to select the coefficient curves:
LCD View
Comments
SPEED CONTROL
<E> NORMAL
E
Normal coefficient curves selected
 Press
SELECTOR
E
to toggle changing the other coefficient curves:
LCD View
Comments
SPEED CONTROL
<E> SOFT
E
Soft coefficient curves selected
LCD View
Comments
SPEED CONTROL
<E> HARD
E
Hard coefficient curves selected
 Press
PROGRAM
P
(“Page”) again to see the PI coefficients:
LCD View
Comments
Kprop = 250 % *
S
Proportional coefficient value (in percent) for selected speed
Kint = 2000 %/s
S
Integral coefficient value (in percent/sec) for selected speed
Note: The LCD shows the values of the Proportional and Integral coefficient of speed control loop for
selected speed. The parameters Kprop & Kint get their values from the curves and
calculations.
 Use the Set Function (see 4.1) in order to increase/decrease the coefficient values to adjust the
coefficients for your type of load.
 Press
FWD
REV
,hold it and press
UP
RPM
or
DOWN
RPM
in order to move the symbol “*” at the display line
end up and down in order to select the display line which is ready to edit.
Note: If you will change one of these values, it will be fixed and will not automatically change as the
speed is adjusted. It will also over-ride load inertia until software hard reset.
 Use the Hard Reset Function in order to return the factory curves of these parameters.