: It is the standard for projects using version 20 firmware on the controller.

Firmware 20.12 represents the peak of the RSLogix 5000 era. It offered a blend of reliability, mature features, and hardware compatibility that made it a favorite among integrators. While the industry moves toward Studio 5000 and firmware versions 33 and 34, v20.12 remains a workhorse in the field.

If you open an older v20.01–20.11 project, RSLogix will prompt to convert to 20.12 (recommended). No logic changes needed.