“Namespace”

Namespace of the selected library. By default, this is identical to the library name, unless it was defined explicitly in the project information when the library was created. You can change the namespace for the open project.

Example: ‎LA‎

“Default”:

Library that triggers the placeholder when no other trigger is defined or is possible.

Requirement: The selected library is a library placeholder, and therefore the setting is available.

Note: For compiler version 3.5.8.0 and higher, the following statement applies in the case of library placeholders with a resolution in the device description that are located in the Library Manager of the “POUs” view. This placeholder is always resolved automatically according to the description of the device that compiles the application.

Selection of version constraint

Requirement: The settings are available only if the selected library is not a library placeholder.

Note: Container and interface libraries are created automatically with library references with version constraint. As far as possible, do not create libraries that include library references with version constraint. Otherwise, you reference the libraries by placeholders. Edit a placeholder resolution in the “Placeholders” dialog.

“Exact version”

: (selected from list box) Version is integrated into the project.

Note: This option is strongly recommended for container libraries, and it is usually preset for this library type.

“Always newest version”

: The library repository is scanned and the latest detected version is integrated.

Note: If a newer library version is available, then the library POUs that are actually used can change. This option is strongly recommended for interface libraries, and it is usually preset for this library type.

“Allow only qualified access to all identifiers”

: Library POUs (and variables) are called in the project only with prepended namespace paths.

“When the current project is referenced as a library in another project ”

Note: Changing the following settings makes sense only if you created a library with your project and therefore opened a library project. In this way, the selected library is referenced in the new library.

“Make visible all IEC symbols in the project if is this reference were directly integrated here.”

: As a container library, the selected library makes the contents of the referenced library visible at the top level (later in a project).

Requirement: A container project is created with a library project. A container library does not implement its own POUs, but references other libraries exclusively. It bundles libraries. A container library can be employed sensibly to bundle multiple libraries (in a reference) in a project. This option must be activated for each library reference.

Symbolic access to library POUs: ‎<namespace of container library>.<POU name>‎

: The contents of the referenced library is accessed uniquely by means of the namespace. The path name consists of the library name and the unique name (library reference), and it is prepended to the POU name.

Requirement: No container project is created with a library project.

“Do not show this reference in the dependency tree.”

: The selected library is not displayed in the Library Manager as a library reference (later in a project). The library is a hidden reference.

Warning: If there are compile errors resulting from hidden library errors, then detecting the errors may be difficult.

: The selected library is displayed as a library reference (later in a project).

“Optional (if the library is missing, no error will be reported).”

: The selected library is treated as optional. When downloading the project that references the library, no error is reported, even if the library is not available in the library repository.