Version 20 is widely regarded as a pivotal release because it is the final version branded as RSLogix 5000 . Starting with version 21, the software was rebranded as Studio 5000 Logix Designer Side-by-Side Flexibility : Reviewers on forums like
If you are using v20.12 today, you are at the ceiling of the RSLogix 5000 brand. To move to v21 or higher, you must transition to .
If you’ve ever looked at your Allen-Bradley controller properties in RSLinx and seen firmware version 20.12
RSLogix 5000 Firmware v20.12: The Critical Bridge in Allen-Bradley Systems
Upgrading to version 20 may increase memory requirements compared to older revisions (v11 or earlier). Major Enhancements & Security Fixes
This version was specifically released to address a vulnerability that could allow attackers to cause a Denial of Service (DoS) or alter the controller's state.
