... SIMATIC Control Platforms (S7-300, S7-400, C7, WinAC PC-Based Control, and ET200 CPUs), offering unparalleled scalability in ... complies with the international standard IEC 61131-3 for PLC programming languages. The IEC standard helps you to structure your ... efficiency. With STEP 7, programmers can select between different programming languages. Besides ladder diagram (LAD) and function block diagram ...