Information and control systems are highly reliant on data communications, so a working knowledge of the latest communications technologies and the essential for anyone designing, specifying or using instrumentation and control systems. This book is a comprehensive treatment of industrial data communications systems. It takes the reader from basic principles to more advanced topics, while keeping the heavy mathematics to a minimum. All of the latest and most popular standards, industrial protocols, industrial networks and communication requirements are covered, helping engineers and technicians to handle the transformation fron the old analog to digital world.