MECHATRONICS DESIGN FROM ZERO TO ONE (STRUCTURED LOGIC DESIGN TO PROGRAM LOGIC OF LADDER DIAGRAM FOR PLC)

The purpose of this work is to study and analyze the methods use to design logic of
ladder diagram for PLC-based controller in automated manufacturing systems. Previous
method employed to design the logic of ladder diagram does not show clearly on how it is
done step by step, widely based on the programmer's experience and their intuition. The
methods proposed namely method A and method G hopefully can help the programmer
especially the new programmer to design the ladder logic systematically and efficiently while
at the same time reduce the time consume to program it. This systematic logic design can help
the programmer to trace back their program for debug purpose. A step by step instruction is
provided in this paper for both method A and method G. Few basic sequence are tested
Finally, a case study on packaging process is provided to illustrate the design procedure of the
proposed methods. In the same time, author will also explore the capability of the Automation
Studio software.