Configurable levels of source control for the configuration of a process automation system are enabled through a preference selection or license. A user that starts with a certain level of source control may later change the level. Manually entered version information is overwritten if the user starts with a basic source control system after using a manual source control system. In the basic source control system, the increment of the version number is based on the significance of the change, where a parameter change in an existing function block is minor. When the user upgrades to full source control, the existing version numbers are maintained and the automated increment is based on the significance of the change determined by the user.