While specific release notes for the 20.12 minor revision are not widely documented, the major version 20 of RSLogix 5000 brought several significant enhancements to the Logix5000 family. Key features included:
In previous versions (including v19 and earlier), having different minor revisions on different computers was not an issue. For instance, a file from version 19.00 could be opened and worked on in version 19.01. rslogix 5000 firmware 20.12
Version 20 represents the final major release of the software under the name before Rockwell Automation transitioned to Studio 5000 Logix Designer (starting with v21). Because version 21 introduced standard-shifting changes—such as the transition to the Logix 5570 and CompactLogix 5370 controllers and a completely overhauled database structure—v20 became a permanent landing zone for older hardware. While specific release notes for the 20