基于PLC应用一个监测和控制平台开发公式外文翻译中英对照英汉互译.doc

英 文 翻 译 专 业：机械设计制造及其自动化 英文翻译 一 英文 Development of a monitoring and control platform for PLC-based applications Abstract This paper discusses the design and implementation of a platform to remotely monitor and control PLC-based processes over TCP/IP or by using the GSM network. The platform is built using industry-standard off-the-shelf PLCs. Integrated with each PLC are communication processors that can be used for connectivity to the network and to a GSM modem. The communication processor module (Ethernet module) used in this work,provides an industrial compatible protocol over TCP/IP that achieves the same functionality as Profinet but at a much higher bandwidth (10/100 Mbps).Additionally, a mobile-based communication protocol that facilitates remote monitoring and control of PLCs using SMS messages has also been developed. The intent here is to provide system users with a back-up communication mechanism in case of a network failure. Keywords:PLC TCP/IP GSM Remote monitoring 1. Introduction The recent growth of networks technology and specially the wide spread of the Internet have promoted the development of distributed measurement systems for a variety of industrial applications. These distributed measurement systems can be used in the monitoring and control of various instruments in the network. A Programmable Logic Controller (PLC) is microprocessor-based control system that can be programmed to sense, activateand control industrial equipment and therefore incorporates anumber of input/output terminals for interfacing to an industrial process. A control program stored in the PLC memory determines the relationship between the inputs and outputs of the PLC. PLCs are intelligent automation stations that possess highly useful and desirable features such as: ? Robustness. ? High degree of scalability: modern PLC families have a widespectrum of CPU types that allows easy scalability in functionality and performance. ? Extensibility: the modular design of