Siemens SIMATIC PCS 7 Operating Manual page 179

Program comparison
The "Version Cross Manager" can be used for the entire program as a tool for comparing
two program versions, as well as for comparing the current project with a backed-up version
of it.
Options for comparing the safety program can be accessed by clicking the "Compare..."
button in the "Edit Safety Program" dialog.
You can use this dialog to compare two safety programs and show and print the differences
between them.
● Block view
Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB
Changes, tracking changes, and acceptance
9.6 Tracking changes in the safety program
179