PLC Programming

4 - The Individual Components
'File' 'Close'
'File' 'Save'
The most recently opened files are listed under the command 'File' 'Exit'. If you choose one of them,
then this project is opened.
If Passwords or User groups have been defined for the project, then a dialog box appears for entering
the password.
With this command you close the currently-open project. If the project has been changed, then
CoDeSys asks if these changes are to be saved or not.
If the project to be saved carries the name "Untitled", then a name must be given to it (see 'File' 'Save
as').
Symbol:
'File' 'Save as'
Shortcut: +
With this command you save any changes in the project. If the project to be saved is called "Untitled",
then you must give it a name (see 'File' 'Save as').
With this command the current project can be saved in another file or as a library. This does not
change the original project file.
After the command has been chosen the Save dialog box appears. Choose either an existing File
name or enter a new file name and choose the desired file type.
Dialog box for Save as
If the project is to be saved under a new name, then choose the file type CoDeSys Project (*.pro).
If you choose the file type Project Version 1.5 (*.pro), 2.0 (*.pro), 2.1 (*.pro) or 2.2 (*.pro), then the
current project is saved as if it were created with the version 1.5, 2.0, 2.1 or 2.2. Specific data of the
version 2.3 can thereby be lost! However, the project can be executed with the version 1.5, 2.0, 2.1 or
2.2.
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 CoDeSys.
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
CoDeSys V2.3 4-17