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Machine safety using a detachable fieldbus connection

COMPUTING & CONTROL ENGINEERING JOURNAL 2004年第2期15卷 44-47页

作者： Hajarnavis, V Young, K Univ Warwick Warwick Mfg Grp Coventry CV4 7AL W Midlands England

programmable safety systems and safety network systems not only provide advantages in terms of flexibility and ease of installation, but also present new techniques for achieving maching safety.

关键词： DeviceNet Control applications in manufacturing processes PLC Instrumentation buses and protocols fieldbus ControlNet Future Automation Control Technology cell programmable logic controllers Control applications in remote signalling, dispatching and safety devices Control technology and theory programmable safety system Pilz safety controller field buses Ethernet Manufacturing systems machine safety programmable controllers network connection Instrumentation buses controller area networks programmable controllers safety systems factory automation

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Automatic arc suppression equipment with fast response based on TSC control technology

Automatic arc suppression equipment with fast response based...

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30th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON)

作者： Liu, YC Lu, TC Fu, C Wuhan Univ Wuhan 430072 Peoples R China

ISBN: (纸本)0780387309

This paper presents a kind of automatic arc suppression equipment with fast response based on thyristor switched capacitor (TSC) control technology. It can mitigate the bad effects caused by single-phase-to-ground-faults in the distribution system. Three functions were realized in order to ensure the equipment's safe and reliable operation: first, intelligent distinguishing a single-phase-to-ground-fault;second, accurate measure of the capacitive reactance of the system-to-ground;third, safe running of thyristors. The control system's hardware composed of PLC, HMI of touch screen and across-zero trigger boards is also proposed. The simulation tests prove the equipment has acceptable performance.

关键词： arcs (electric) thyristors power capacitors power distribution faults power distribution reliability programmable controllers power distribution control automatic arc suppression thyristor switched capacitor control single-phase-to-ground-faults distribution system reliability capacitive reactance programmable logic controller PLC

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Dynamic Real-time Simulator for Hydraulic Turbine Generating Unit Based on programmable Computer Controller

Dynamic Real-time Simulator for Hydraulic Turbine Generating...

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30th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON)

作者： Fang Hong-qing Shen Zu-yi Hohai Univ Coll Water Conservancy & Hydropower Engn Nanjing Peoples R China

ISBN: (纸本)9780780387300

A dynamic real-time simulator for hydraulic turbine generating unit based on programmable computer controller has been developed. The basic mathematical models of each component of the hydraulic turbine generating unit were analyzed. The hardware configuration and the software implementation of the dynamic real-time simulator were described in detail. With the simulator, the transients of the different Operating conditions of the hydraulic turbine generating unit could be calculated and simulated in real-time. The performance of the hydraulic turbine governor could be test and fine-tuned whether developed in the laboratory or installed in the field. The dynamic real-time simulator also can be operated as a training system for new workers of the hydro power plant Some simulations and field tests have been conduct with a prototype hydraulic turbine governor, and the results indicate that the dynamic real-time simulator has a good performance.

关键词： hydroelectric generators turbogenerators programmable controllers control engineering computing power engineering computing programmable computer controller hydraulic turbine generating unit dynamic real-time simulator software implementation hydro power plant hydraulic turbine governor

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Structured design of reconfigurable logic control functions through sequential functional charts

Structured design of reconfigurable logic control functions ...

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American Control Conference

作者： Carpanzano, E Cataldo, A Tilbury, D CNR Inst Ind Technol & Automat I-20131 Milan Italy

ISBN: (纸本)0780383354

In the present work a modular logic control design methodology for Reconfigurable Manufacturing Systems is presented. The presented method guarantees reachability, liveness, and reversibility for the designed control solution. In particular, the logic control functions are designed through the Sequential Functional Charts graphical language, which is one of the programming languages included in the IEC 61131 standard for industrial programmable Logic controllers. The different steps of the proposed framework are presented with reference to a real size industrial application example, where the design of the logic control for an innovative shoe Reconfigurable Manufacturing System assembly line is discussed.

关键词： control system synthesis programmable controllers industrial control footwear industry programming languages control engineering computing reconfigurable logic control function modular logic control design sequential functional charts graphical language IEC 61131 standard industrial programmable logic controller reconfigurable manufacturing system assembly

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Fieldbus based distributed control system

Fieldbus based distributed control system

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8th International Conference on Control, Automation, Robotics and Vision (ICARCV 2004)

作者： Xing, JC Wang, P Cheng, BY Wang, SQ Yang, QL Nanjing Univ Sci & Technol PLA Res Inst Control & Measurement Nanjing 210007 Jiangsu Prov Peoples R China

ISBN: (纸本)0780386531

This paper gives a detailed description of a new design of fieldbus based distributed computer control system. The main features of the control system are the thoroughly distributed architecture, the intelligent field mounted control modules, and the two level data communication networks. The field control models composed of an embedded controller can be programmed through network using the standard IEC61131 compatible software tool package. The local controllers operate as embedded web servers that enable the HMI software in the supervising level to monitor the system through the browser.

关键词： field buses distributed control intelligent control embedded systems file servers control system synthesis data communication programmable controllers fieldbus based distributed control system intelligent field mounted control modules two level data communication networks embedded controller programming IEC61131 compatible software tool package embedded Web servers HMI software

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The practice of industrial logic design

The practice of industrial logic design

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American Control Conference

作者： Lucas, MR Tilbury, DM Univ Michigan Dept Mech Engn Engn Res Ctr Reconfigurable Machining Syst Ann Arbor MI 48109 USA

ISBN: (纸本)0780383354

Many academic researchers have been working on the problem of how to improve industrial logic design. The problem that many are trying to solve is the perceived inefficiency of the current methods, which use primitive, low-level design languages, practically no logic reuse, and are very time consuming. To solve these problems researchers have focused on methods which can be verified against a known specification language, or which can be automatically generated from a specification. This work has generally been done with a minimal understanding of what the current logic design methods actually are. In this work, we present the results of an observational study of the current methods of creating control logic. We find that the current specifications are generally informal and loosely defined, and that the typical logic designer is responsible for determining the details of system behavior, anticipating potential problems, and coordinating with other designers. This is a larger range of activities than generally addressed by logic design schemes focused on verification or automatic logic generation.

关键词： industrial control logic design programmable controllers specification languages programming languages formal verification formal specification design engineering industrial logic design method low level design languages control logic designer automatic logic generation specification language

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Introduction to Microprocessors and Microcontrollers 2

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2004年

作者： John Crisp

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Analog and Digital Circuits for Electronic Control System Applications 1

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2004年

作者： Luecke Jerry

ISBN: (数字)9780080475813

ISBN: (纸本)9780750678100

Today’s control system designers face an ever-increasing “need for speed and accuracy in their system measurements and computations. New design approaches using microcontrollers and DSP are emerging, and designers must understand these new approaches, the tools available, and how best to apply *** practical text covers the latest techniques in microcontroller-based control system design, making use of the popular MSP430 microcontroller from Texas *** book covers all the circuits of the system, including:·Sensors and their output signals·Design and application of signal conditioning circuits·A-to-D and D-to-A circuit design·Operation and application of the powerful and popular TI MSP430 microcontroller·Data transmission circuits·System power control circuitryWritten by an experienced microcontroller engineer and textbook author, the book is lavishly illustrated and includes numerous specific circuit design examples, including a fully tested and documented hands-on project using the MSP430 that makes use of the principles described. For students, engineers, technicians, and hobbyists, this practical text provides the answers you need to design modern control systems quickly and easily. Seasoned Texas Instruments designer provides a ground-up perspective on embedded control systems Pedagogical style provides a self-learning approach with examples, quizzes and review features

关键词： programmable controllers

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A complete PLC on a chip? It's not far away

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COMPUTING AND CONTROL ENGINEERING 2004年第5期15卷 39-39页

作者： Babb, M

A German manufacturer is working to produce what may be considered the ultimate in automation miniaturisation: a complete programmable controller cast in silicon. Its maker says that it will not only be the world's smallest, but also the fastest. VIPA is one company keenly interested in producing high-speed PLCs. In 1997 VIPA formed its ASIC design centre and a new subsidiary called Profichip and began working on Profibus interface chips and other devices, such as ASICs that consolidated much of the functionality of a PLC. Proflchip's next step in PLC evolution is to merge all the functions on its CPU 517 Slot into one piece of silicon, which it calls the PLC 7100. This is the real single chip PLC.

关键词： Microprocessor chips VIPA programmable controller electronics industry Profibus interface chip Semiconductor industry ASIC Control applications in the electronics industry PLC programmable controllers Profichip programmable controllers system-on-chip Microprocessors and microcomputers

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A13: Using of extensible framework for distributed control design

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IFAC Proceedings Volumes 2004年第20期37卷 76-81页

作者： Jiri Koziorek VSB-Technical University of Ostrava Czech Republic. Department of Measurement and Control. Str. 17 Listopadu No.15 708 33 Ostrava-Poruba Czech Republic

The contribution brings results of a general framework extension development with final aim to obtain a CASE-like tool for distributed control systems design. The tool should be suitable for the systems with programmable controllers and should be based on the international standards IEC 61131 and IEC 61499. The general framework was developed at Department of Measurement and Control, VSB-TU Ostrava. The described system allows covering of main steps of design process from system analysis to implementation of control application.

关键词： Distributed control Control system design programmable controllers CASE Control system analysis

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