Software Menu
Select a controller in the Plant structure workspace
.Go to Controller
.The workspace area displays the Controller menus.
Menu  | Functionality  | 
|---|---|
Current version  | The main active working software.  | 
Stored version  | A stored inactive software.  | 
It is possible to switch between installed software versions and this has two advantages:
Controller software can be loaded to controllers in parallel to normal operation. If several controllers are to be updated, a switch can then be made very quickly on all controllers at the same time.
If a software upgrade results in unexpected results, a switch to the previous version is a quick back-up fix.