Control System Documentation: Applying Symbols And Identification

Instrument symbols and identifiers are critical in designing and describing control systems, but sometimes personal or corporate idiosyncrasies can make deciphering them difficult. The authors, who are experienced practitioners, approach this type of documentation systematically, describing its importance as a tool of communication. They show the basic symbols and how these symbols work in situations such as functional identification, function designation, parallel and serial loop numbering, and coding. They then describe how to develop process flow diagrams and apply them to structured control concepts in feedback control, decoupling, load balancing and switched controls. They examine variants such as engineering flow diagrams, loop diagrams, logic diagrams, ladder diagrams and wiring diagrams. They conclude with the installation and finishing details. Throughout they use case studies, summaries, and lists of questions. Annotation ©2004 Book News, Inc., Portland, OR (booknews.com)