Technical data

Tips and Tricks
26.3 Rearranging
Programming with STEP 7
552 Manual, 05/2010, A5E02789666-01
26.3 Rearranging
If unexplained problems occur when working with STEP 7, it often helps to rearrange the database
of the project or library.
Select the menu command File > Rearrange to do this. This removes any gaps which occur when
contents are deleted, meaning that the amount of memory required for the project/library data is
reduced.
The function optimizes the data storage for the project or library in a similar way to which a
program defragments a hard disk also optimizes file storage on the hard disk.
The duration of the reorganization process depends on the amount of data to be moved around
and may take some time. The function is therefore not executed automatically (for example, when
you close a project) but must be triggered by the user when he/she wants to rearrange the project
or library.
To check the extent to which the data management is being used, select the block folder and select
the menu command Edit > Object Properties. The click the "Get fill level" button in the "Fill Level"
tab. When the fill level has been calculated, the values and a recommendation for the
reorganization of the project are displayed in the lower part of the tab.
Requirement
Projects and libraries can only be rearranged if no objects in them are being edited by other
applications and therefore locked for access.
26.4 Editing Symbols Across Multiple Networks
The LAD/STL/FBD program editor lets you view and edit the symbols of multiple networks.
1. Select a network name with a click on the network name (e.g. "Network 1").
2. Hold down the CRTL key and add further networks to your selection.
3. Right-click to call the context-sensitive menu command Edit Symbols.
Use the shortcut CTRL+A to select all networks of a block and then highlight a network name.