© 2005-2016 Nira Control AB 60
modify the cell values, they will be modified in a weighted fashion, with
greater weight given to cells closer to the operating point.
Example: In picture 4-19 above, the operating point is farther to the
right than the left and thus, when using the +, -, / or * keys to modify
the values, the cells to the right will be adjusted more than those to the
left.
The operating point is visible in the graphical view as well and the same type
of adjustments described above can be made in the graphical view.
Saving/Opening Tables
It’s possible to save an individual table in a file, an mtx-file. This file can be
opened independently of the global i3d-file.
It’s also possible to associate a particular mtx-file with a quick-access button.
There are four round, green quick-access buttons to the left above the cells
in any open table. They are numbered 1-4. You make the associon by clicking
on the small down-arrow to the right of the corresponding quick-access
button. The file can be loaded later by clicking on the quick-access button, or
by hitting Ctrl-1 through Ctrl-4 on the keyboard.
4.5 PID Controllers
NIRA i7 uses a number of PID controllers.
A general functionality overview follows in this chapter.
4.5.1 What is a PID controller?
A PID controller is named after the Proportional, Integral and Derivative
control modes it uses. PID controllers are used in most automatic process
control applications in industry and automotive. PID controllers can be used
to regulate flow, temperature, pressure, level, and many other industrial
process variables.
To Next Page
Loading...
