Multifacetted modelling and discrete event simulation
Multifacetted modelling and discrete event simulation
Application of design and control tools in a multirobot cell
Computers and Industrial Engineering
Programmable logic controllers versus personal computers for process control
Proceedings of the 21st international conference on Computers and industrial engineering
An integrated modelling method to support manufacturing systems analysis and design
Computers in Industry
Automated synthesis of Ladder automation circuits based on state-diagrams
Advances in Engineering Software
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Proposed in this paper is the architecture of a PLC programming environment that enables a visual verification of PLC programs. The proposed architecture integrates a PLC program with a corresponding plant model, so that users can intuitively verify the PLC program in a 3D graphic environment. The plant model includes all manufacturing devices of a production system as well as corresponding device programs to perform their tasks in the production system, and a PLC program contains the control logic for the plant model. For the implementation of the proposed PLC programming environment, it is essential to develop an efficient methodology to construct a virtual device model as well as a virtual plant model. The proposed PLC programming environment provides an efficient construction method for a plant model based on the DEVS (Discrete Event Systems Specifications) formalism, which supports the specification of discrete event models in a hierarchical, modular manner.