Starter kit for ecomatController EC2121
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5.3.5
Function block diagram (FBD)
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FBD (function block diagram) is a graphic programming language in the standard IEC 61131-3. Blocks
with symbols from the boolean algebra, for example, are added to the program.
Since FBDs are particularly suited for boolean functions, it is also used in the example program.
To enter more complex formulas, a textual language from IEC 61131-3 such as structured text
(ST) is better suited and clearer than FBD.
The upper part of the block is for the declaration of variables.
Underneath, there is the first (still empty) network. In this area, the program is created.
On the right, there is a section with the available tools.
