Amazon.com description: Product Description: PLC Programming Using RSLogix 500 - Advanced Programming Concepts!; the second book of this series, takes an in depth look into the world of automation control. If you have ever wanted to learn the skills needed to troubleshoot modern equipment and process controls, or to write programs for automated equipment, this book series is a great place to start. The author not only discusses many of the advanced instructions, but gives ladder logic examples and plenty of additional illustrations, that detail exactly what an instruction does! The first book in this series, “Basic Programming Concepts”, builds a great foundation in understanding addressing syntax, using the different Allen Bradley data files, and many of the input, output and timer instructions. “Advanced Programming Concepts” goes several steps further in building on this knowledge base, and takes the student to the next level of understanding and confidence in ladder logic programming! Some of the topics covered in book 2 include: • The “math”, “comparison”, “data register”, and “program flow” instructions. • More detail on timers and counters, retentive timers and the use of the “reset” instruction. • Methods of “nesting” timers and counters together to build specific time periods. • What “analog scaling” is all about and the programming involved for scaled values for analog input or output modules. • More detail on RSLinx communication protocols and drivers, complete with step-by-step configuration.