Rockwell Automation 20D-DL2-CKS1 Import/Export Project Components - Manual (Page 37)

Import and export logic components Chapter 1
The import/export feature supports forward compatibility for export operations,
and does not support backward compatibility for export operations. Earlier
versions of the Logix Designer application cannot read .l5k or .l5x files that were
created with later versions of the application. In some cases, an .l5k or .l5x file
created with a later version of the Logix Designer application may import with
warnings into an earlier version of the application. In these cases, attributes on
components may be set to default values during import.
Each version of the Logix Designer application exports .l5k files with a specific
import/export Logix Designer application version number. The Logix Designer
application imports any .l5k file with the same major revision number and the
same or lower minor revision number. The major Logix Designer application
version number increments when file properties prevent the application from
supporting backward compatibility for import operations. The minor version
number increments whenever there is a change in the file (a new module, an
attribute is added, the set of options for an attribute is changed) that does not
affect backward compatibility for Logix Designer application import operations.
Important: Use caution when copying and pasting components between different versions of Logix Designer
application. Logix Designer application supports pasting to only the same or later version. Pasting to an
earlier version of Logix Designer application is not supported. When pasting to an earlier version, the paste
action might succeed but the results might not be as intended.
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