State Diagrams A New Programming Method for Programmable Logic Controllers

摘要

A new fast and reliable way of writing programs for PLCs is the state diagram programming method. This method enables both sequential and non-sequential processes to be described in a graphical form. Automation tasks are broken down into function units, of which the states and their coordination are described graphically by state diagrams. Each state diagram has only one active state, but can exchange information with other diagrams for coordination purposes. The result is a set of interlinked state "automatons". Grouping; for example by machine subassemblies, gives the automation task a clear structure.