【導(dǎo)讀】譯文標(biāo)題PLC、工業(yè)PC與DCS的特點(diǎn)與趨勢。作者所在系別機(jī)械工程系。作者所在專業(yè)機(jī)械設(shè)計制造及其自動化。指導(dǎo)教師職稱副教授。完成時間2020年12月07. 作者Charles譯名查爾斯國籍美國

　　

【正文】 k, but also the sequence — 12 — control logic control and the ladder diagram, and the selftuning PID parameters set, adaptive control. DCS manufacturers for the provision of various software modules, such as SPC / SQC (statisticalprocess control / statistical qualitycontrol), CAD, artificial intelligence and expert systems, greatly enriched the DCS software library, an increase of highlevel control system , the senior now on the market has reached thousands of control packages. Expert System, multivariable predictive control, fuzzy logic control and artificial neural work technology has been gradually practical and mercialization. DCS future software design and development will continue to focus on the following several aspects of the characteristics: modular program design, objectoriented programming。 dedicated programming method used to achieve the X Window, voice recognition, etc., in order to industrial automation users provide more flexibility in the application of the operator interface. (6) intelligent sensors and other digital equipment to enter the scene of DCS At present, the industrial process control automation pany has introduced a large number of microprocessors, have both analog and digital signal output, and digital munication capabilities of intelligent field instrument. DCS manufacturers are using a variety of methods of the digital field devices integrated into its own system. Honeywell IACD such as twoway munication system for intelligent transmitter and TDC3000 process controller connections and other ponents。 ABBPele twoway munication system using 9600 baud FSK physical layer transmission, including its hardware input Fieldbus Fieldbus modules and terminal unit, software management procedures, including the transmitter and the transmitter function block。 Moore pany Mycro HART door connector can support 256 pointtopoint connections or over 480 points connected intelligent transmitter。 Foxbro panies addition to its own digital equipment integrated into the scene intelligent I / O system, also provides more than 60 other manufacturers, connecting doors connector. Fieldbus standard, from the bottomup equipment to achieve the interconnection of different manufacturers, with the current technology development trend. At present, the development of fieldbus standard has been a high degree of international attention, is integrated industrial automation control system indispensable ponent. With the — 13 — standardization of fieldbus munication technology development, the more intelligent DCS and control will shift downward, decentralized control equipment at the field level. They will DCS in the diagnosis and treatment provide a better platform, which enables more advanced DCS to open forms. (7) DCS further acmodate industrial PC and PLC Industrial PC and PLC equipment as the DCS is now very mon. DCS overwhelming majority of manufacturers has been providing industrial PC, PLC to DCS work connected to the hardware interface and application software. Industrial PC can make use of touchscreen and CRT window, a menudriven approach may be to establish control strategy can also be used to achieve a plug on the motherboard and external munication. Through appropriate software and hardware interfaces, industrial PC with DCS in the process of connecting loop controller for loop control graphics. DCS industrial use as a PC operating station, programming terminals, surveillance, Taiwan, workstations, such as ABBPele, panies such as DCS Feixieer few years ago and the IBM PC patible, DEC Professional, as well as 300 personal puters, etc. used for system configuration, monitoring, programming, and other tasks. Apart from some manufacturers developed a series of interface ponents and software, industrial PC as a DCS operator stations and other tasks, but also by thirdparty manufacturers such as OnSpec, and other process control packages. The relationship between the PLC and DCS is not only bine, and pete. Most are now bining DCS ladder logic programming technology, all PLC increases the simulation module to deal with the continuous production process. PLC through structural improvements, munications and working capacity and control functions to increase and the introduction of similar DCS operator station, with monitoring puter operator interface. DCS also continuously enhance and batch processing capabilities, a smallscale, highfunctional, modular direction. Thus DCS and PLC are gradually move closer, the two boundaries bee increasingly blurred. They are functional and application of mutual peration and integration. Thus, in many applications, it is difficult to distinguish between what is the PLC, which is the DCS. DCS are generally of the PLC interface can be connected to the PLC in the DCS. At present, a PLCbased DCS developed very quickly, discrete manufacturing and — 14 — process industries tend to use hybrid control strategy PLC / DCS. Some of the same chassis system will be continuous control and PLC logic function together, not a separate PLC systems, such as the United States RTP 2020/2200 by the HCS that way, the system will be plete PLC and DCS features integrated together with the application of a control strategy Configuration Software NetSuite can plete all the control functions in the design and configuration. (8) Use of new technologies such as optical fiber munication DCS in its development process and draw upon a variety of advanced technology. Optical fiber munications, highdensity largecapacity disk surface mount technology, voice synthesis and recognition, multimedia, and other new technologies, as well as lowpower CMOS RISC processor and other devices and has been in some of the new DCS has been fully applied. Optical fiber munications technology in the application o