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Application of PLC as a Gateway in a Network of Smart Power Transducers

IFAC-PapersOnLine 2015年第24期48卷 95-98页

作者： Iovev, Atanas N. Yakimov, Peter I. Technical University of Sofia Sofia1000 Bulgaria

The modern control of the electrical power system faces various challenges caused by the introduction of renewable energy sources and rapidly changing loads. Key problem in reaching successful and sustainable control is the smart sensor networks development. The paper presents an approach for development of such network using the possibilities of the programmable logic controllers. The considerations in the organisation of the network and the choice of a PLC as a gateway are discussed. The main options of the proposed software solution are explained. © 2015, IFFCA (Internaitional Fedreation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Electric power system control Control engineering Electric power systems Gateways (computer networks) Power control programmable logic controllers Renewable energy resources Sensor networks Transducers Electrical power system Industrial networks Modern control Renewable energy source Smart power Software solution

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Differentiation of pityriasis lichenoides chronica from guttate psoriasis by dermoscopy

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CLINICAL AND EXPERIMENTAL DERMATOLOGY 2015年第7期40卷 804-806页

作者： Errichetti, E. Lacarrubba, F. Micali, G. Piccirillo, A. Stinco, G. Univ Udine Dept Expt & Clin Med Inst Dermatol I-33013 Udine Italy Univ Catania Dermatol Clin I-95124 Catania Italy San Carlo Hosp SOC Dermatol & Malattie Sessualmente Trasmesse Potenza Italy

Clinical differentiation between pityriasis lichenoides chronica (PLC) and guttate psoriasis (GP) may sometimes be a difficult task, which often requires histological analysis to reach a definitive diagnosis. In this study, PLC and GP lesions were examined using dermoscopy, and the significance of specific dermoscopic findings was investigated in order to facilitate their differentiation and decrease the number of cases requiring biopsy. We found that the incidence of orange-yellowish structureless areas, focal dotted vessels and nondotted vessels was statistically significant in PLC, while the incidence of diffuse dotted vessels was statistically significant in GP.

关键词： guttate psoriasis Incidence Dermoscopy Individualized Instruction Pityriasis Pityriasis Lichenoides Chronica Ships programmable logic controllers

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Integrating Lab-size Automation Plants into a Web-based E-learning Environment for Teaching C Programming in Teams

Integrating Lab-size Automation Plants into a Web-based E-le...

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3rd IFAC Workshop on Internet Based Control Education (IBCE 2015)

作者： Vogel-Heuser, Birgit Rehberger, Sebastian Gramss, Denise Mayer, Felix Tech Univ Munich Inst Automat & Informat Syst D-80290 Munich Germany

Teaching computer science and particularly programming in the curriculum of a mechanical engineering bachelor poses a difficult task due to motivational factors of the students. In this paper we describe the measures we have taken to reduce barriers and motivate the freshmen students to deal with the subject by introduction of an e-learning course and further by offering an associated lab course with practical application of cyclic programming of a real-time system in teams. Further we present an adapted architecture how the lab course is enhanced to act as a remote lab Finally we evaluate the impact of the course by measuring the success factors of different gender combined groups and give an outlook on future scenarios for lab courses to improve the learning experience and success of the students for both gender. (C) 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： remote control programmable logic controllers control education laboratory education

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An Overview on RFID Technology Instruction and Application 15

An Overview on RFID Technology Instruction and Application

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15th IFAC Symposium on Information Control Problems in Manufacturing

作者： Chetouane, Fatah Univ Moncton Fac Engn Moncton NB E1A 3E9 Canada

This paper provides a non-exhaustive, rather earlier than recent;overview of contributions in the field of Radio Frequency Identification technology: (RFID), and its use in several sectors. The multidisciplinary nature of this emerging technology requires skills from various engineering fields. Due to the growing use of RFID in various economic sectors, it seems essential to educate engineers, and technicians, to better master this technology. For this purpose. an RFID engineering technology curriculum may be established using different approaches. This paper discuss an approach to integrate RFID technology within usual engineering curriculums by stressing its link to usual disciplines such as industrial, electrical and computer engineering. A case of an RFID laboratory established at the Universite de Moncton (UdeM) is shown. An RFID-based automation of a flexible conveyor system application, carried out in this laboratory. is also described. (C) 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Data privacy Data transmission Electromagnetic waves Flexible automation Identification programmable logic controllers Software engineering

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Evolvable Assembly Systems: A Distributed Architecture for Intelligent Manufacturing 15

Evolvable Assembly Systems: A Distributed Architecture for I...

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15th IFAC Symposium on Information Control Problems in Manufacturing

作者： Chaplin, J. C. Bakker, O. J. de Silva, L. Sanderson, D. Kelly, E. Logan, B. Ratchev, S. M. Univ Nottingham Fac Engn Inst Adv Mfg Nottingham NG7 2RD England Univ Nottingham Sch Comp Sci Agents Lab Nottingham NG7 2RD England

Modern manufacturing companies are under economic pressure to respond more rapidly to a changing production environment, including short product life cycles, individually customisable products. and the introduction of new disruptive manufacturing processes. This paper details a new manufacturing philosophy and software architecture for Evolvable Assembly Systems, based on the principles of decentralization, context-awareness and intelligent resources, that is implemented using intelligent agent technology and a data distribution service. We also detail the Smart Manufacturing and Reconfigurable Technology demonstrator - an instantiation of the Evolvable Assembly Systems architecture that implements a proof-of-concept abstract custom pharmaceuticals production line. (C) 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Adaptive Systems Agents Architectures Autonomous Control Decentralized Systems Distributed Artificial Intelligence Flexible Automation Intelligent Manufacturing Systems Knowledge-Based Systems programmable logic controllers

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A Hardware Implementation of Arithmetic Operations for an FPGA-based programmable logic Controller 13

A Hardware Implementation of Arithmetic Operations for an FP...

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13th IFAC and IEEE Conference on programmable Devices and Embedded Systems

作者： Kulisz, Jozef Chmiel, Miroslaw Krzyzyk, Adrian Rosol, Marcin Silesian Tech Univ Inst Elect Gliwice Poland

The paper presents the Arithmetic and logic Unit (ALU) of a prototype programmable logic Controller (PLC), implemented in an FPGA device. The PLC implements on the machine language level a subset of the instruction set defined in the EN 61131-3 norm. The design was prepared as a set of synthesizable Verilog. and VHDL models. The ALU can execute 32 operations, which include the basic logic operations, comparators. and the four basic arithmetic operations. The operations can be performed for fixed-point, and floating-point numbers. All the operations are implemented fully in hardware, so the solution is fast. The HDL models used for synthesis can be easily ported to other FPGA architectures, or to an ASIC. (C) 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： programmable logic controllers Central processing units Arithmetic and logic units Arithmetic algorithms Microprocessors Digital circuits logic arrays Field programmable gate arrays Floating-point arithmetic

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IEC 61131-3-based PLC Implemented by means of FPGA 13

IEC 61131-3-based PLC Implemented by means of FPGA

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13th IFAC and IEEE Conference on programmable Devices and Embedded Systems

作者： Chmiel, M. Czerwinski, R. Smolarek, P. Silesian Tech Univ Fac Automat Control Elect & Comp Sci Inst Elect Akad Str 16 PL-44100 Gliwice Poland

The paper discusses the design process of a programmable logic controller implemented by means of FPGA device. Designed PLC is to be compliant with EN 61131-3 standard. Different aspects of instruction list and hardware architecture designing are presented. e.g. PLC structure with particular emphasis on central processing unit or memory map. Conclusions on an EN 61131-3 Standard are also shown. The developed PLC is implemented using FPGA device. This gives opportunity to develop interesting solutions. For example, using dual port RAM gives us opportunity to develop bit/word access without necessity of masking bits. Up to date FPGA devices have also disadvantage - there arc no tri-state buffers inside. This is the reason for using multiplexers that control traffic on busses. (C) 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Control Systems Central Processing Unit programmable logic Devices EN 61131-3 Standard programmable logic controllers

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Programming of sequential control systems using functional block diagram language 13

Programming of sequential control systems using functional b...

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13th IFAC and IEEE Conference on programmable Devices and Embedded Systems

作者： Wcislik, M. Suchenia, K. Laskawski, M. Kielce Univ Technol Fac Elect Engn Automat Control & Comp Sci Kielce Poland

The paper deals with the methodology of creation of sequential control system programs in the language of function block diagrams (FBD). After analyzing basic blocks of the sequential functions chart (SFC) language, the form of state block and implementation of branching or connecting paths of sequences are formulated using the FBD language. It is a simplification of the application of the SFC language. Our method of creating the sequential system ensures a compact form of the final program and is particularly useful for small PLC controllers. The method is illustrated by example of the simple sequential control system. (C) 2015. IFAC (International Federation Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： sequence control programmable logic controllers block diagrams flip-flops decoders

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Exploiting Multicore Processors in PLCs using Libraries for IEC 61131-3 20

Exploiting Multicore Processors in PLCs using Libraries for ...

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20th IEEE Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Specht, Felix Flatt, Holger Eickmeyer, Jens Niggemann, Oliver Fraunhofer IOSB INA Applicat Ctr Ind Automat Langenbruch 6 D-32657 Lemgo Germany

ISBN: (纸本)9781467379298

This paper presents an approach for exploiting multicore hardware architectures on coding level for the IEC 61131-3. An interface between the IEC 61131-3 code and software of a different programming language outsources the actual parallel workload. For validation purpose, an embedded multicore hardware is used as a controlling device, which executes software for the use case of model based condition monitoring. The case study results show an explicit benefit of the multicore exploiting software in comparison to its singlecore counterpart, which is reflected with a faster processing of up to a factor of 3. Overall, this approach can be used for developing high performance applications or for accelerating existing applications in industry.

关键词： Multi-core processors programmable logic controllers International Electrotechnical Commission Outcome Studies Control apparatus computer software Libraries PROCESSOR

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Internet-facing PLCs as a Network Backdoor 3

Internet-facing PLCs as a Network Backdoor

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IEEE Conference Communications and Network Security CNS

作者： Klick, Johannes Lau, Stephan Marzin, Daniel Malchow, Jan-Ole Roth, Volker Free Univ Berlin Secure Ident Res Grp Berlin Germany

ISBN: (纸本)9781467378765

Industrial control systems (ICS) are integral components of production and control processes. Our modern infrastructure heavily relies on them. Unfortunately, from a security perspective, thousands of PLCs are deployed in an Internet-facing fashion. Security features are largely absent in PLCs. If they are present then they are often ignored or disabled because security is often at odds with operations. As a consequence, it is often possible to load arbitrary code onto an Internet-facing PLC. Besides being a grave problem in its own right, it is possible to leverage PLCs as network gateways into production networks and perhaps even the corporate IT network. In this paper, we analyze and discuss this threat vector and we demonstrate that exploiting it is feasible. For demonstration purposes, we developed a prototypical port scanner and a SOCKS proxy that runs in a PLC. The scanner and proxy are written in the PLC's native programming language, the Statement List (STL). Our implementation yields insights into what kinds of actions adversaries can perform easily and which actions are not easily implemented on a PLC.

关键词： Control systems Debugging Hardware Programming Software programmable logic controllers Debugging control systems Computer hardware Programming computer software Proxy Control procedures

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