One of the most popular books available today, Technician's Guide to Programmable Controllers, 4th Edition includes complete explanations, examples readers can relate to, plus a writing style well-suited to electrical students as well as journeyman and apprentice technicians, make. Its systematic approach enables readers without prior knowledge to gain a comprehensive understanding of what a programmable logic controller is, how it works, plus how it is programmed and installed. Numerous and varied troubleshooting techniques are also introduced, making this book a valuable reference for professional maintenance electricians and plant engineers. Fully updated, the fourth edition now reflects use of personal computers for programming devices, including detailed programming information on both the Allen-Bradley SLC-500 and the MicroLogix family of programmable logic controllers. Supplemental information on logic gates has also been added to assist readers in gaining an understanding of programming and the symbols used.