Simatic S5 PLC

About: Simatic S5 PLC is a research topic. Over the lifetime, 482 publications have been published within this topic receiving 2414 citations.

Programmable Logic Controllers

Abstract: Now in four-color, this outstanding text for the first course in programmable logic controllers (PLCs) focuses on how PLCs work and gives students practical information about installing, programming, and maintaining PLC systems It's not intended to replace manufacturer's or user's manuals, but rather complements and expands on the information contained in these materials All topics are covered in small segments Students systematically carry out a wide range of generic programming exercises and assignments All of the information about PLCs has been updated Table of contents 1 Programmable Logic Controls (PLCs): An Overview2 PLC Hardware Components3 Number Systems and Codes4 Fundamentals of Logic5 Basics of PLC Programming6 Fundamental PLC Wiring Diagrams and Ladder Logic Programs7 Programming Timers8 Programming Counters9 Program Control Instructions10 Data Manipulation Instructions11 Math Instructions12 Sequencer and Shift Register Instructions13 PLC Installation Practices, Editing, and Troubleshooting14 Process Control and Data Acquisition Systems15 Computer-Controlled Machines and Processes

1 – Programmable logic controllers

Abstract: Publisher Summary This chapter presents an introduction to the programmable logic controller, its general function, hardware forms, and internal architecture. A programmable logic controller (PLC) is a special form of microprocessor-based controller that uses a programmable memory to store instructions and to implement functions such as logic, sequencing, timing, counting, and arithmetic to control machines and processes. It is designed to be operated by engineers with perhaps a limited knowledge of computers and computing languages. Input devices and output devices in a system being controlled are connected to the PLC. The operator enters a sequence of instructions, that is, a program, into the memory of the PLC. The controller then monitors the inputs and outputs according to this program and carries out the control rules for which it has been programmed. PLCs are now widely used and extend from small self-contained units for use with perhaps 20 digital inputs/outputs to modular systems, which can be used for large numbers of inputs/outputs, handle digital or analogue inputs/outputs, and also carry out proportional-integral-derivative control modes. A PLC system has the basic functional components of a processor unit, memory, power supply unit, input/output interface section, communications interface, and programming device. It consists of a central processing unit (CPU) containing the system microprocessor, memory, and input/output circuitry. The CPU controls and processes all the operations within the PLC.

OpenPLC: An open source alternative to automation

Abstract: Companies are always looking for ways to increase production. The elevated consumerism pushes factories to produce more in less time. Industry automation came as the solution to increase quality, production and decrease costs. Since the early 70s, PLC (Programmable Logic Controller) has dominated industrial automation by replacing the relay logic circuits. However, due to its high costs, there are many places in the world where automation is still inaccessible. This paper describes the creation of a low-cost open source PLC, comparable to those already used in industry automation, with a modular and simplified architecture and expansion capabilities. Our goal with this project is to create the first fully functional standardized open source PLC. We believe that, with enough help from the open source community, it will become a low cost solution to speed up development and industrial production in less developed countries.

A Fog Computing Based Cyber-Physical System for the Automation of Pipe-Related Tasks in the Industry 4.0 Shipyard

Abstract: Pipes are one of the key elements in the construction of ships, which usually contain between 15,000 and 40,000 of them. This huge number, as well as the variety of processes that may be performed on a pipe, require rigorous identification, quality assessment and traceability. Traditionally, such tasks have been carried out by using manual procedures and following documentation on paper, which slows down the production processes and reduces the output of a pipe workshop. This article presents a system that allows for identifying and tracking the pipes of a ship through their construction cycle. For such a purpose, a fog computing architecture is proposed to extend cloud computing to the edge of the shipyard network. The system has been developed jointly by Navantia, one of the largest shipbuilders in the world, and the University of A Coruna (Spain), through a project that makes use of some of the latest Industry 4.0 technologies. Specifically, a Cyber-Physical System (CPS) is described, which uses active Radio Frequency Identification (RFID) tags to track pipes and detect relevant events. Furthermore, the CPS has been integrated and tested in conjunction with Siemens’ Manufacturing Execution System (MES) (Simatic IT). The experiments performed on the CPS show that, in the selected real-world scenarios, fog gateways respond faster than the tested cloud server, being such gateways are also able to process successfully more samples under high-load situations. In addition, under regular loads, fog gateways react between five and 481 times faster than the alternative cloud approach.

A Web-based programmable logic controller laboratory for manufacturing engineering education

Abstract: This study presents the design and development of a Web-based programmable logic controller (PLC) system architecture that supports “hands-on” laboratory exercises in automated manufacturing systems control area for distance education. The system architecture allows remote users to access and control a PLC-based table-top manufacturing system via the Internet. A Web site has been designed and developed that facilitates interactivity and supports PLC programming and control. The architecture has been tested and implemented in the course Emgt 334 Computer Integrated Manufacturing Systems at the Integrated Systems Facility (ISF) in the Engineering Management Department at the University of Missouri-Rolla during Fall 2001. This study shows that software tools available in the market can be integrated to develop a fairly complex, yet effective, learning environment for distance education. The architecture presented in this paper is not dependent on specific PLC hardware or software configuration, it represents a generic infrastructure.