The document describes an automation upgrade project for the Leeuwkuil Mill in Vereeniging, South Africa. The project involved upgrading the mill's control system from an analog and S5 PLC hybrid system to a Totally Integrated Automation (TIA) system using Siemens components. The upgrade was conducted in two phases, replacing the drives and adding a mill PLC in phase 1, and adding a shear PLC, removing the S5 PLCs, and completing commissioning in phase 2. The TIA system integrated the PLCs, drives, SCADA system, and panels to provide benefits like centralized engineering, integrated diagnostics, and remote access to the SCADA system.