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Desktop |
  
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Desktop |
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Every structured text file is presented as follows.
Figura 1: Arquivo Texto Estruturado
The structured text editor has the following components:
| 1. | ST editor toolbar |
Icone |
Descrição |
Atalho |
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Go to last edited line |
Ctrl + Q |
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Search for selected characters |
Ctrl + F3 |
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Go to next selection of characters found |
F3 |
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Go to the next selection of found characters (reverse) |
Shift + F3 |
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Enable and disable highlighting of found character selections |
Alt + Shift + H |
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Enable and disable frame selection |
Ctrl + Shift + R |
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Go to previous row marker |
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Go to next row marker |
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Enable and disable line marker |
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Shift line left |
Alt + Shift + <-- |
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Shift line to the right |
Alt + Shift + --> |
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Comment |
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Uncomment |
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| 2. | Initialization of local variables |
The creation and initialization of local variables in the Structured Text language must be carried out at the beginning of the document, between the keywords VAR and END_VAR.
Examples:
(*Variables Initialization*)
VAR
A : INT;
B : INT := 100;
C, D : BOOL;
F : FB_CTU;
END_VAR
| 3. | Implementation of functions |
The ST instructions must be programmed after the keyword END_VAR, the word responsible for closing the area destined for the declaration of local variables.
