: Version 20 is the final major release under the "RSLogix 5000" name; version 21 and later were rebranded as Studio 5000 Logix Designer .
If you have multiple v20 controllers, upgrade all of them to 20.12 to standardize your plant backups. rslogix 5000 firmware 20.12
Better support for CIP Sync (Common Industrial Protocol) allowed for more precise motion control and time-stamping across distributed I/O. : Version 20 is the final major release
Corrected rare logic execution anomalies and user interface crashes. Hardware and Software Compatibility Corrected rare logic execution anomalies and user interface
As one user aptly noted, if your processor is running firmware version 20.12, you can download to it using since the major revision matches.
Firmware version 20.12 is highly notable because it serves as a critical security and resiliency update. Rockwell Automation released this specific minor revision to patch known vulnerabilities and improve controller stability against memory corruption and unauthorized communication disruptions.