The procedure to make a PLC backup is as follow:
1. Open the code system software like CoDesys
V2.3
2. Recently opened PLC backup file will open
3. Click on file and close the program
4. Select on open
5. Open project from PLC section select on PLC
6. Configuration window will appear
7. Select on PLC model like Breakers Nexgen 5220 T1.4
8. Select on ok
9. Communication parameters window will appear select on update
10. Select on ok
11. Load project from PLC window will appear
12. Select on ok
13. Load project window will appear select on no all
14. Select on ok
15. The backup has now successfully been made
16. Click on file and select on save as ,Put the file name and save the project