Programmable Logic Controller (PLC) Tutorial, GE Fanuc

This could be a good book. I starts out well, but the author after the step by step of the first example (number 6.1) stops giving step-by-step instructions. The second example (number 6.2) introduces for the first time the concept of Timers. He shows you what a timer is but never shows you how setup the timer with the proper values. Without knowing how to setup the three words a timers needs, it becomes a roadblock to programing. Number 6.3 introduces counters and again, never shows how to set it up.For now I would not advice anybody to buy this book.

It is very preliminary. The book is filled by big pictures and large fonts rather than rich concepts.