RSLogix 500 is a legacy Windows-based programming software developed by Rockwell Software (now part of Rockwell Automation) for the and MicroLogix families of programmable logic controllers (PLCs). Released originally in the late 2000s, Version 8.10 significantly expanded the software's capabilities by adding support for then-new hardware like the MicroLogix 1400 controller. 1. Key Features of Version 8.10