a modeling methodology for process control in the automated manufacturing system
This paper reports a modeling methodology for generating the Programmable Logic Controller (PLC) code and the Plant model. Since the control part is not deeply considered in the early design phase of manufacturing system, it often takes much time to create or to modify when the method of process is changed. The test run to verify the control logic is fulfilled in the constructed line, and it sometimes takes severe damages on facilities or human resources. Therefore the PLC simulation is getting more important recently. For the PLC Simulation, the counterpart model (Plant Model) to the PLC is necessary to model the virtual devices. Regarding the forward engineering principle, this paper proposes modeling approach which enables to create PLC code and Plant model for PLC simulation. With the careful investigation about the PLC code and the Plant model, the paper shows three important factors for manufacturing system design, such as hierarchical device structure, possible states for each device, and the process sequence in each station unit.
programmable logic controller (plc) plant model digital factory fsa