Statement list (STL) and structured control language (SCL) are the text-oriented programming languages in the programming software STEP 7. Now in its fourth edition, this book is an introduction into the latest version of STEP 7. It describes elements and applications for use with both SIMATIC S7-300 and SIMATIC S7-400, including the applications with PROFINET. It is aimed at all users of SIMATIC S7 controllers. First-time users are introduced to...