PLC Programming

4 - The Individual Components
'Project' 'Import'
Once you have made your selection in the dialog box window (the same way as with 'Project'
'Document' ), you can decide, whether you want to export the selected parts to one file or to export in
separate files, one for each object. Switch on or off the option One file for each object then click on
OK. The dialog box for saving files appears. Enter a file name with the expansion ".exp" respectively a
directory for the object export files, which then will be saved there with the file name
.
In the resulting dialog box for opening files select the desired export file.
The data is imported into the current project. If an object with the same name already exists in the
same project, then a dialog box appears with the question "Do you want to replace it": If you answer
Yes, then the object in the project is replaced by the object from the import file. If you answer No, then
the name of the new objects receives as a supplement an underline and a digit ("_0", "_1", ..). With
Yes, all or No, all this is carried out for all objects.
If the information is imported to link with a library, the library will be loaded and appended to the end of
the list in the library manager. If the library was already loaded into the project, it will not be reloaded.
If, however, the export file that is being imported shows a different storage time for the library, the
library name is marked with a "*" in the library manager (e.g. standard.lib*30.3.99 11:30:14), similar to
the loading of a project. If the library can not be found, then an information dialog appears: "Cannot
find library {\} ", as when a project is loaded.
In the message window the import is registered.
'Project' 'Siemens Import'
In the submenu "Siemens Import" you find the commands for importing POUs and variables from
Siemens-STEP5 and STEP7 files.
The following commands are available:
• "Import from SEQ symbol file"
• "Import from S5 file"
See Appendix G: for more detailed information about Siemens import.
'Project' 'Compare'
This command is used to compare two projects or to compare the actual version of one project with
that which was saved last.
Overview:
Definitions: actual project: Project, which you are currently working on.
reference project:
compare mode:
unit:
Project, which should be compared with the actual project.
in this mode the project will be displayed after the command
'Project' 'Compare' has been executed.
Smallest unit which can be compared. Can be a line
(declaration editor, ST editor, IL editor), a network (FBD
editor, LD editor) or a element/POU (CFC ediotr, SFC editor).
In compare mode the actual project and the reference project will be presented in a bipartited window.
The names of the POUs, for which differences have been found, are marked by color. For editor
POUs also the content of the POUs is displayed in a vis-a-vis way. The results and the way of
presenting in compare mode depend on: 1. what filters have been activated for the compare run,
affecting the consideration of whitespaces and comments during comparison; 2. whether modification
within lines or networks or elements are evaluated as a completely new inserting of a POU or not.
The version of the reference project can be accepted for single diffences or for 'all equally marked'
differences. To accept means that the version of the reference project is taken over to the actual
project.
CoDeSys V2.3 4-29