What software identifies the project's revision and opens the appropriate version, if installed?

The software that identifies the project's revision and opens the appropriate version is Studio 5000. This application is specifically designed to work with Allen-Bradley control systems and is the latest integrated development environment for programming and managing control systems. Studio 5000 offers version control functionalities, enabling it to recognize the specific revisions of projects, ensuring that users are working with the most accurate and compatible version of their programming files.

In contrast, while FactoryTalk is a suite of software designed for visualization and data management, it does not directly handle project revisions in the same way. RSLogix is an earlier programming tool primarily for traditional Allen-Bradley PLCs, lacking the more advanced capabilities integrated into Studio 5000 for version management. ControlLogix refers to a family of control systems and hardware, rather than software used to manage project versions. Therefore, Studio 5000 is the most appropriate choice for managing project revisions.