PLC Programming

Declaration Editor...
It is available in the context menu () or in the 'Extras' menu, if the cursor is positioned on the
name of a function block in a text editor or if the function block box is selected in a graphic editor.
Intellisense Function
If the option List components is activated in the project options dialog for category 'Editor' , then the
"Intellisense" functionality will be available in all editors, in the Watch- and Receiptmanager, in the
Visualization and in the Sampling Trace:
• If you insert a dot "." instead of an identifier, a selection box will appear, listing all local and global
variables of the project. You can choose one of these elements and press 'Return' to insert it
behind the dot. You can also insert the element by a doubleclick on the list entry.
• If you enter a function block instance or a structure variable followed by a dot, then a selection box
listing all input and output variables of the corresponding function block resp. listing the structure
components will appear, where you can choose the desired element and enter it by pressing
'Return' or by a doubleclick.
Example:
Insert "struvar." -> the components of structure struct1 will be offered:
5.2 Declaration Editor...
Declaration Part
The declaration editor is used to declare variables of POUs and global variables, for data type
declarations, and in the Watch and Receipt Manager. It gives access to the usual Windows functions,
and even those of the IntelliMouse can be used if the corresponding driver is installed.
In Overwrite mode, 'OV' is shown in black on the status bar; switching between Overwrite and Insert
modes can be accomplished with the key.
The declaration of variables is supported by syntax coloring.
The most important commands are found in the context menu (right mouse button or +).
All variables to be used only in this POU are declared in the declaration part of the POU. These can
include: input variables, output variables, input/output variables, local variables, retain variables, and
constants. The declaration syntax is based on the IEC61131-3 standard. An example of a correct
declaration of variables in CoDeSys-Editor:
5-2 CoDeSys V2.3