or potentially alter the controller's operating state via a buffer overflow. Motion Control Fixes:
RSLogix 5000 with a controller at firmware revision 20.12 , you must ensure your programming software matches the major revision of the hardware. The Automation Blog 1. Software Compatibility Version Matching : There is no RSLogix 5000 version "20.12." You should use RSLogix 5000 Version 20.01 Minor Revision Note
Version 20.12 is a . Changes from earlier 20.x:
The "20" denotes the major version, while the ".12" indicates the minor revision or patch level. This version is the final build in the v20 series, which holds a unique place in Rockwell history. V20 was the last firmware version to be programmed exclusively with the legacy software interface. Starting with version 21, Rockwell transitioned to the Studio 5000 environment, which unified controller programming with view design (FactoryTalk View ME) and other engineering tools.
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.
With RSLogix 5000 effectively end‑of‑life, planning a migration to the current Studio 5000 platform is a prudent long‑term strategy. Here is a general approach for the migration path: