“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 select only the input variables and output variables of a function block instance.

“Show symbols from system libraries in Input Assistant”

System libraries are inserted in the library manager automatically and displayed in light gray.

: Symbols, such as global variables, data types, and function blocks, are offered in the Input Assistant.

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

“List components after typing a dot (.)”

: Activates the "List components" function. When you type a dot (‎.‎) at a location where CODESYS expects an identifier, a list box appears with possible code.

“List components immediately when typing”

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

: While you type code, a list box appears with possible identifiers and operators.

“Insert with namespace”

: CODESYS adds the namespace before the identifier.

“Convert keywords to uppercase automatically (AutoFormat)”

: CODESYS displays all keywords in uppercase.

“Automatically list selection in cross-reference view”

: The cross-reference list automatically shows the references of variables, POUs, and DUTs that are currently selected or where the cursor is waiting.

“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. In this way, cross-references within the editor are quickly detected.

“Max. degree of parallelism”

List box for the number of parallel threads that 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.