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Two beginning control keys, they can let the operator hand move a beginning of control the system with stop, so reduced to take place an accident of danger. 6. The user changes an example programming Current of air coil fore the noodles has already elaborated on: It can let us understand to control the condition that a system need and that is in the actual movement in system and have to provide all function facilities. But, such as before speak of of so, use a PLC or particular controller, this kind of control bees more easy of, and the nicety of the system will also raise. The usage traditional PLC of, such as figure 7, 8 show, notice while draw electricity chart of connect the logic of circuit. The usage is this kind of programmable controller and the user needs to know to circulate the idea of the method and the structure of the programming each step. That is to say, use traditional PLC, the user knows the relation of of each operation. Under the general circumstance, User can before connecting a people39。s aring an importation to carry, but launch the direct control valve of machine is an exportation to carry and have an internal procedure to operate among them all circulate essential logic, imitate other devices like calculator, in fixed time machine etc., carry on a control to the whole movement appearance of system. Can according to need numerous time to establish and imitate thus of system, so all from PLC usage, this item contains vivid advantage. Therefore can save time, the danger of decrease error, in the meantime under the sistuation that use same material, it can be getting more precise. Many pany that is on the market used the PLC of normal regulations and it can not only control with the current of air system, but also can use various electricity equipments. PLC wide range of application, can be apply in much industry to produce medium, even used for safety and automation of building in. Because of above various characteristic, the PLC provided a lot of resourceses in somely physically appliedly, even include not a resources of control the system and the electricity system was a kind of application like the engineering of automation, the PLC usage is more expensive, particularly is to those small scaled systems. Aim at this kind of circumstance39。除了微控制器之外 ,只有少量的零部件執(zhí)行一些如輸出,輸入,類比輸入 ,顯示接口和連續(xù)運行的情況等功能。 使用傳統(tǒng)的 PLC的 ,如圖 7, 8所示,在繪制接口處的電圖表時,要注意線路的邏輯。 他們中最重要的是連接在每一步驟中的平行線路。 圖 6 顯示了程序設(shè)計的第一部分。第一步,主動器 A 開始運行,并保持在一個特定的位置一直到一個循環(huán)的結(jié)束,如圖 5 所示它可以確定某一對象的下一運動。但是也可以設(shè)計一個程序 ,利用可視資源為使用者翻譯所需要的信息。 4. 2 安全性 如果想正常運行程序,必須保證每一個步驟都正確的執(zhí)行。在步驟的運行過程中,程序自動選擇如何讀取每一步驟的結(jié)構(gòu)。這一個控制器以不同的方式工作 ,它讀取步驟的結(jié)構(gòu) ,等待輸入 ,然后升級或輸出,然后直接跳躍到下一個步驟,開始另一次的程序運行。在設(shè)計的最后階段,系統(tǒng)中會有一個從來不變化的序列和明確的輸入和輸出端。 這種方式的不同標準的線路基法叫循序漸進式或規(guī)則系統(tǒng),它對氣流和電氣系統(tǒng)非常有效,而且也是此項目的一個基礎(chǔ)。 這種基于微控制器的適用范圍比較小,只能用于一個類型的機器或者可以用做一個像普通 PLC 一樣可以被編程的控制器,那樣它就可以通過可變化的邏輯程序來進行各種作業(yè)。 因為可 以根據(jù)需要無數(shù)次創(chuàng)建和模擬這樣的系統(tǒng),所以皆由 PLC 的使用,此項目有靈活的優(yōu)點。 畢業(yè)設(shè)計 (論文 )外文資料翻譯 系 部: 機械系 專 業(yè): 機械工程及自動化 姓 名: 學(xué) 號: 外文出處: Programmable Controller Designe for Electropoeumatic Systems 附 件: ; 。因此,可以節(jié)省時間,減少失誤的危險,同時在使用相同材料的情況下,它可以更加精密。所有的這些特性根據(jù)具體需要的不同而不同,具體的設(shè)計者的經(jīng)驗的不同而不同。它包括根據(jù)發(fā)動機狀態(tài)各個不同變化所設(shè)基礎(chǔ) 上的系統(tǒng)。我們把一個序列從輸入端輸入,經(jīng)過轉(zhuǎn)換后,由輸出端輸出。 它也有局限性,例如這種控制器有時會不執(zhí)行指令,在同一程序指令下,會出現(xiàn)某一個運行的反復(fù)等等 ,但是這一個問題可以通過外部的邏輯運行解決。這個操作有兩個位元組位于電子輸入處。更重要的是,應(yīng)該有預(yù)防運行故障和問題的解決方法。 但是,如果想聯(lián)結(jié)電腦接口和控 制器,至少應(yīng)該有一個儀器來保證數(shù)據(jù)的可靠性。第二步, 當 A 完成了它的工作后,主動器 C 連同 B 一起開始盡可能多的產(chǎn)生電流圈,并受 B 的運行速度的限制,而 B 速度由一個流動的控制活瓣管理。我們把每個步驟的所有運行統(tǒng)稱為 . (A+) 表示主動器 A 向前推動,而 (A) 表示返回到開始的位置。那一個線路能夠隨時停止序列而且將主動器的狀態(tài)換成一個特定的位置。使用這種可編程的控制器 ,使用者必須知道運行方法的觀念并且規(guī)劃每個步驟的結(jié)構(gòu)。 單獨使用內(nèi)部記憶 ,我們可以控制一個有 48個步驟的氣流系統(tǒng),但是如果使用一個比較簡單的系統(tǒng),就會達到 60個步驟 .控制器的變成不使用 PLC 語言 ,而是用一個比較簡單的和直覺的結(jié)構(gòu)。s a kind of viable way establish a controller that can provide particular size and function. This kind of controller can create according to the tiny controller. This kind of applies scope according to the tiny controller smaller, the machine that can used for a type perhaps can use to do a be like the mon PLC is similar and can be wo