v36 is the most current advanced version as of 2026, offering native OPC UA client and server functionality directly in the controller.
Do not search for a global "best version." It doesn't exist. Follow this 3-step decision tree:
, there is no single "best" version for every scenario; instead, industry consensus points to specific versions for different goals. The Gold Standard for Stability: Version 20.04 For legacy systems and older hardware, Version 20.04
It supports a vast range of older hardware (like the L6 series) still found in many factories today.
: Released in late 2025, this represents the current frontier for the newest Rockwell hardware. 3. Versions to Use with Caution
