Method of double-quick designing trapezium diagram of programmable controller
Lao You-lan · 2004
The paper provided a method of double-quick designing trapezium diagrams of programmable controller,and its key problem was how to switch the three design bases to program diagrams or how to use a diagram to describe the three essential factors of the electrical command unit,checkup unit,executive unit and middle-memory unit in a work cycle.According to this diagram,the switch function formula may be written out through logical algebra and then a trapezium diagram may be drawn.This method is of such characteristics as quickness,simplicity and success on its first program.