Technical data

Appendix
27.4 Working with Older Projects
Programming with STEP 7
Manual, 05/2010, A5E02789666-01 631
27.4.2 Editing Version 2 Projects and Libraries
Version V5.2 of STEP 7 no longer supports Changes in V2 Projects. When you edit V2 projects
or libraries, inconsistencies can occur such that V2 projects or libraries can no longer be edited
with older versions of STEP 7.
In order to continue to edit V2 projects or libraries, a STEP 7 version older that V5.1 must be used.
27.4.3 Notes on STEP 7 V.2.1 Projects with GD Communication
• If you want to convert a project with global data from STEP 7 V2.1 to STEP 7 V5, you must first
open the GD table with STEP 7 V5.0 in the STEP 7 V2.1 project. The communication data
configured previously are automatically converted into the new structure via GD
communication.
• When you archive STEP 7 V2.1 projects, older programs (ARJ, PKZip...) may issue an error
message if the project contains files with names which are more than eight characters in
length. This message also appears if the MPI network in the STEP 7 V2.1 project was edited
with an ID which is more than 8 characters in length. In STEP 7 V2.1 projects with global data,
edit a name for the MPI network which is a maximum of eight characters in length before you
start to configure global data communication for the first time.
• If you want to rename a STEP 7 V2.1 project, you must reassign the headings of the columns
(CPUs) in the GD table by re-selecting the appropriate CPU. If you restore the old project
name, the assignments are displayed once more.