“Declare unknown variables automatically (AutoDeclare)”

: The “Declare Variable” dialog opens when you type an undeclared identifier into an implementation language editor and then click away from the input line.

In order for the AutoDeclare function to be available in the ST editor as well, the “Enable for ST editor” option also has to be selected.

“Enable for ST editor”

Requirement: The “Declare unknown variables automatically (AutoDeclare)” option is selected.

: The AutoDeclare function is also available in the ST editor.

: The AutoDeclare function is not available in the ST editor.

“Show all instance variables in input assistant”

: The “List components” function also lets you select the local variables of a function block instance.

: The “List components” function lets you select only the input variables and output variables of a function block instance.

“Show symbols from system libraries in input assistant”

System libraries are automatically inserted in the Library Manager and displayed in light gray.

: The Input Assistant offers symbols, such as global variables, data types, and function blocks.

: The symbols of the system libraries are not available in the Input Assistant.

“List components after typing a dot (.)”

: Enables the “List components” function

When you type a dot (‎.‎) at a location where CODESYS expects an identifier, a list box opens, offering possible code.

“List components immediately when typing”

Requirement: The “List components after typing a dot (.)” option is selected.

: While you type code, a list box opens, offering possible identifiers and operators.

“Insert with namespace”

: CODESYS adds the namespace before the identifier.

“Convert keywords to uppercase automatically (AutoFormat)”

: CODESYS automatically displays all keywords in uppercase.

“Automatically list selection in cross reference view”

: The cross-reference list automatically displays the references of variables, POUs, and DUTs which are currently selected or where the cursor is positioned.

“Underline Errors in the Editor”

: Incorrect or unknown program code is underlined.

“Highlight symbols”

: All occurrences of a symbol where the cursor is positioned are highlighted in color within the editor. As a result, cross references within the editor are quickly detected.

“Max degree of parallelism”

List box for the number of parallel threads which can be used for the precompile processing

CODESYS detects the displayed number of threads from the number of CPU cores. This default number should be changed only in exceptional cases.