We saw the need for a quick start book on Siemens Step 7 programming. Two additional chapters have been added to the second edition. There is a step-by-step chapter on creating a project. The coverage of project organization provides the basis for a good understanding of programming and project organization. Linear and modular programming are covered to provide the basis for an understanding of how an S7 project is organized and how it functions. The book covers ladder logic and Function Block Diagram (FBD) programming. There is In-depth coverage of ladder logic, timers, counters, math, special instructions, and function blocks. Wiring and use of I/O modules for various PLC models is covered. Sinking/sourcing, and the wiring of digital and analog modules are covered.