This paper presents a software module made by means of programmable logic controller and an HMI (Human Machine Interface), designed to control the movement electric wheelchair. By developing this module, major advantage is offered people with disabilities, who have difficulties. implementing command on wheelchair, can move independently using machine that be controlled from touch screen. In dir...

Abstract A domain-specific virtual prototyping approach is proposed that can reduce the risks involved in programmable logic controllers (PLCs)-based embedded system programming. The proposed approach is based on an object-oriented real-time modeling concept, plus an algorithm is defined that can mechanically convert a PLC program, written in relay ladder logic (RLL), to a statechart model. In ...

Programmable logic controller is still the main device used for control of productive systems, which can be approached as discrete event dynamic systems. For programming these controllers, five languages were standardized by IEC 61131, and the LD (ladder diagram) language is distinguished among the others, i.e., it has been widely applied in productive systems, even with studies that confirm th...

We present a new type of attack termed denial of engineering operations in which an attacker can interfere with the normal cycle of an engineering operation leading to a loss of situational awareness. Speci cally, the attacker can deceive the engineering software during attempts to retrieve the ladder logic program from a programmable logic controller (PLC) by manipulating the ladder logic on t...

In this paper the dynamic modeling of repairable and standby components of complex systems is analyzed using Petri Nets and ladder logic diagrams. The use of Petri Nets as modelling of a complex system avoids two basic disadvantages of Markov chain analysis. First, the Petri Net model does not grow in size as increasing the number of components and second, Markov chain has been limited to the e...

Dengan berkembangnya teknologi di dunia industri maka semakin banyak inovasi-inovasi terbaru yang dapat mempermudah proses produksi industri. Proses pengemasan telur adalah salah satu dikembangkan dalam pengelolahannya yaitu dengan cara menggunakan program pada PLC. PLC (Programmable Logic Controllers) merupakan sebuah sistem pengendali untuk menjalankan suatu rangkaian.. Biasanya secara manual...

Almost all factories now use automated system, where the factory using a control system that can do work itself and operator are not too play an active role. With runs automatically is expected to yield production will increase with quality of product generated same no difference. Common used by company in form PLC (Programmable Logic Controller). The uses two OMRON CP1H as drivers integrated C...

Discrete-event dynamic systems (DEDS) are characterized by a set of states which the system can take, and by the set of asynchronous events that cause the state changes at discrete time points. Programmable logic controllers (PLCs) are still important special purpose computers used to automate the DEDS in industry. Ladder logic diagrams (LLDs) are still the most popular graphical programming to...

In this article, a speed control of DC motor is designed and illustrated using fuzzy logic-based programmable logic controller (PLC). The DC motor is an attractive part of electrical equipment in many industrial applications requiring variable speed and load specifications due to its ease of controllability. The designed system is consisted of three main parts including programmable logic contr...

We present two modelling approaches for the application of model checking to verify railway interlockings. The first translates so-called Ladder Logic into Scade language, the second models a segment of railway from scratch. The verification tool used is Scade.