有關(guān)現(xiàn)場總線控制外文資料翻譯(存儲版)
【正文】 絡(luò) 不再是孤立的控制系統(tǒng) ,通過工業(yè)以太網(wǎng)和現(xiàn)場總線技術(shù)實現(xiàn) 網(wǎng)絡(luò) 集成 ,將基礎(chǔ)自動化控制、過程控制和管理與企業(yè)資源計劃層 ERP(Enterprise Resource Planning)連接在一起 。然后一格格地執(zhí)行梯形圖 程序。 2） PLC 的控制算法 模擬變量可以是任何受控的變量，例如在我們的卷繞系統(tǒng)中為 溫度或壓力。 要用固定的模型和參數(shù)來處理系統(tǒng)，常規(guī)的 PID 就夠了，但是固定是相對的，事實上，卷繞系統(tǒng)的參數(shù)在一定的范圍內(nèi)是可變的，因此，控制器必須有一個監(jiān)控系統(tǒng)，用于基于現(xiàn)場總線魯棒性的 PLC控制的制造系統(tǒng)，以獲得高的性能。s storage and extraction, as well as application function. This bus wire connect the longdistance equipments in system and control equipment of other manufacturer. Especially, the adoption of control word used in munication and control reduced the quantity of control cable, also. The good treatments of grand and protection has an every strong capability of anti jamming. With the scale of social production extends and the production horizontal exalts, the electricity control technique and the Hydraulic technique all develop very quickly. Electricity control technique developed from the relay system to the direct digit control ( DDC) system、 the disperse control system( DCS) to the fieldbus control system (FCS).The modern Hydraulic control technique have developed to a plete automation which include of transmit, control、 testing puter technique, and gradually turn to the digit control and fullautomatic control. According to the actuality of the studied water power station, the thesis bine the advanced fieldbus technique, Ether and the traditional hydraulic technique together ,and use them to design the supervise controlling system of the water power station. Base on the gatecontrolling request of the water power station， designed the gate39。 today it has developed into a powerful control system with the central of processor and has many functions such as all kinds of calculations control and work. With its excellent stability and powerful functions, PLC is now widely used in manufacture industry, electric power field, traffic field and etc. The PLC program uses a cyclic scan in the main program loop such that periodic checks are made to the input variables. The program loop starts by scanning the inputs to the system and storing their states in fixed memory locations (input image memory). The ladder program is then executed rungbyrung. Scanning the program and solving the logic of the various ladder rungs determine the output states. The updated output states are stored in fixed memory locations (output image memory). The output values held in memory are then used to set and reset
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