Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 137)

L-force | PLC Designer
The Individual Components

DMS 3.2 EN 02/2011 TD29 135
You can also save the current project as a library in order to use it in other projects.
Choose the file type Internal library (*.lib) if you have programmed your POUs in PLC
Designer.
Choose the file type External library (*.lib) if you want to implement and integrate
POUs in other languages (e.g. C). This means that another file is also saved which
receives the file name of the library, but with the extension "*.h". This file is
constructed as a C header file with the declarations of all POUs, data types, and global
variables. If external libraries are used, in the simulation mode the implementation,
written for the POUs in »PLC Designer«, will be executed. Working with he real
hardware the implementation written in C will be executed.
Encryption of a project:
In order to save the project as an encrypted project or library, choose option Encrypted
PLC Designer Project (*.pro) resp. Encrypted internal library (*.lib) or Encrypted
external library (*.lib). In this case you get the 'Encryption' dialog , where you can
define and confirm a key. The project later cannot be opened esp. a library cannot be
used without this key :
Dialog for the encryption of a project
The encryption extends the protection of a project, which up to now was only possible
via the assignment of passwords for access and write protection. These possibilities
will exist further on, but regard that they e.g. cannot avoid that a library is included in
a project without the need of entering a library password (key).
A key once defined will be saved with any further savings of the project. To modify
that key, you have to use again the 'Save as' dialog.