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Programming Languages

When it comes to selecting which one of the available programming languages to
use, there is no clear rule. The languages available are Structured Text, Instruction
List, Function Block Diagram, and Ladder Diagram. These are all “basic”
programming languages and can be used in any code block. You can even use more
than one language in a single program, function block, or control module.

There is an additional “programming language”, Sequential Flow Chart (SFC). SFC
is not, in a sense, a “real” programming language, but rather a structural
programming tool. Using SFC, you can easily design more complex sequences than
would be possible (with the same effort) in any of the other languages. As the name
Sequential Flow Chart implies, you have to plan sequentially when using this
language.

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