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Section 4 Engineering Interface
The engineering interface is the front-end towards the application engineer. In a
library there are Control Module (CM), Function Block (FB) and Diagram (D) types
that are ready to use, but also types which are intended to be modified before usage,
so called templates.
The programming method for building an application is either text based or
graphical. There are currently two graphical interfaces available for editing in
Control Builder:
• The Diagram (D) editor
• The Control Module Diagram (CMD) editor.
The text based editor is called the POU editor or just editor. The POU editor is used
to create code blocks inside the program, inside the control modules or inside the
diagrams. This editor supports different programming languages:
Language name Description
ST Structured text. This language is pure text based.
IL Instruction list. This language is pure text based.
FBD Function block diagram that in fact is a kind of
graphical editor for the FBD language.
LD Ladder diagrams. This language has also a
graphical visualization of the code.
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