The MicroLogix 1100 PLC is still heavily used in the industry and is one of the most recommended PLCs for learning PLC programming. The MicroLogix 1100 PLC is compact, offers a variety of I/O configurations and is inexpensive relative to other Rockwell options. Furthermore, the MicroLogix 1100 PLC is programmable using the free version of RSLogix 500 that can be downloaded from the official Rockwell website.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/micrologix-1100-rslogix-500-external-io-plc-programming-tutorial