Provides key fundamentals of the basic techniques of PLC programming. Gives basic explanations of how a programmable controller keeps track of logic with On-Off (1 or 0) states, and explains how these can be used to do the jobs that relays have done for so long. Contains illustrated examples of jobs including controlling lighting from one to four locations while still using only single-pole lighting switches. Includes actual PLC ladder logic diagrams.
© 1999, 102 pgs, Paperback, By Ryan G. Rosandich