This report focuses on the technical reality, challenges, and workarounds, as ProTool was officially discontinued in 2007 and is not natively supported on modern OS. 1. Executive Summary Siemens ProTool (including ProTool/Lite, ProTool/Pro, and ProTool/CS) was the legacy HMI configuration software for text-based displays (OP3, OP7, OP17) and early graphic panels (TP27, OP27, OP37). It was replaced by WinCC flexible (2005) and later by WinCC (TIA Portal).