Modeling of elevator control logic based on Mark Flow Graph and its implementation on programmable logic controller

Abstract

Elevator control logic is very complicated, and therefore, it is troublesome to program and implement it correctly on programmable logic controller (PLC). The paper describes the method to model elevator control logic using Mark Flow Graph (MFG), and translate MFG model into PLC programming language Sequential Function Chart (SFC). We show an example of 3-story elevator control using laboratory equipment.