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.