【正文】 PLC的通信已經(jīng)愈來愈體現(xiàn)它的價(jià)值，在PLC與PLC之間的通信，能夠通過信息的溝通和數(shù)據(jù)的共享來保證設(shè)備之間的相互協(xié)調(diào)，已達(dá)到互補(bǔ)的效果。HMI的前景可以說十分的看好。新的技術(shù)總是為了給我們帶來更安全和便捷的操作，使得我們面臨的一大堆問題一掃而光，你有了解過HMI嗎？這里說HMI你根本不清楚它是什么，也沒有興趣了解，換一個(gè)中文把它說明為觸摸屏或者人機(jī)界面你就知道了，它和PLC的結(jié)合給了我們更大的空間。PLC的內(nèi)部包含了具有中央處理器的CPU，并帶有外部I/O口擴(kuò)展的I/O接口地址和存儲器三大塊組成，CPU的核心是由一個(gè)或者多個(gè)累加器組成，它們具有邏輯的數(shù)學(xué)運(yùn)算能力，并能讀取程序存儲器的內(nèi)容通過計(jì)算后去驅(qū)動(dòng)相應(yīng)的存儲器和I/O接口；I/O口將內(nèi)部累加器和外部的輸入和輸出系統(tǒng)連接起來，并將相關(guān)的數(shù)據(jù)存入程序存儲器或者數(shù)據(jù)存儲器中；存儲器可以將I/O口輸入的數(shù)據(jù)存入存儲器中，并在工作時(shí)調(diào)轉(zhuǎn)到累加器和I/O接口上，存儲器分程序存儲器ROM和數(shù)據(jù)存儲器RAM,ROM可以將數(shù)據(jù)永久的存入存儲器中，而RAM只能作為CPU計(jì)算時(shí)臨時(shí)計(jì)算使用的緩沖空間。在許多復(fù)雜的生產(chǎn)過程中難以實(shí)現(xiàn)的目標(biāo)控制、整體優(yōu)化、最佳決策等,熟練的操作工、技術(shù)人員或?qū)＜摇⒐芾碚邊s能夠容易判斷和操作，可以獲得滿意的效果。s request. This kind of breaks off the medium interruption to also became to break off the set. The Class that certainly break off is relevant according to various resources of CPU with internal PLC, also following a heap of capacity size of also relevant fasten.The contents that break off has a lot of kinds, for example the exterior break off, correspondence in of send out and accept the interruption and settle and the clock that count break off, still have the WDT to reset the interruption etc., they enriched the CPU to respond to the category while handle various business. Speak thus perhaps you can39。t answer the phone, the other party also。 But take data in the watch for an instruction procedure that controls the PLC, that had the difficulty very much, for example you have to control one pedestal robot to press the action work that you imagine, you will draw up for it the form that a procedure bine with the data sends out to pass by.The form that information transport contain single work, the half a work and the difference of a workses .The meaning of the single work also is to say both, a can send out only, but a can receive only, for example a spy he can receive the designation of the superior only, but can39。t is tolerant of. New technique always for bringing more safe and convenient operation for us, make we a lot of problems for face on sweep but light, do you understand the HMI? Says the HMI here you basically not clear what it is, also have no interest understanding, change one inside text explains it into the touch to hold or manmachine interface you knew, it bines with the PLC to our larger space.HMI the control not only only is reduced the control press button, increase the vivid of the control, more main of it is can sequence of, and at can the change data input to output the feedback with data, control in the temperature curve of imitate but also can keep the manifestation of view to e out. And can write the function help procedure through a plait to provide the help of various what lies in one39。s address and saving machine three big pieces to constitute, CPU core is from an or many is tired to add the machine to constitute, mathematics that they have the logic operation ability, and can read the procedure save the contents of the machine to drive the homologous saving machine and I/ Os to connect after pass the calculation。s labor strength, reduce the establishment on the personnel. The target control of the hard realization in many plicated production lines, whole and excellent turn, the best decision etc., welltrained operation work, technical personnel or expert, governor but can judge and operate easily, can acquire the satisfied result. The research target of the artificial intelligence makes use of the calculator exactly to carry out, imitate these intelligences behavior, moderating the work through person39。最后，我要感謝關(guān)心我們論文撰寫的各位學(xué)院領(lǐng)導(dǎo)和老師們，感謝你們四年來的悉心栽培！參考文獻(xiàn)[1] 謝麗萍，王占富，. [Z].北京：人民郵電出版社，（工業(yè)自動(dòng)化實(shí)用技術(shù)叢書）.[2] View組態(tài)王. [Z] ..[3] 高安邦，石磊，[Z].北京：中國電力出版社，.[4] 西門子（中國）.[5] 西門子（中國） 420通用型變頻器使用大全.[6] ，2002:244251.[7] 2014年中國水務(wù)行業(yè)市場發(fā)展現(xiàn)狀[EB/OL] .附錄附錄1：梯形圖程序附錄2：外文文獻(xiàn)PLC technique discussion and future developmentAlong with the development of the ages, the technique that is nowadays is also gradually perfect, the petition plays more more strong。系統(tǒng)硬件與梯形圖程序、硬件與組態(tài)監(jiān)控的調(diào)試中，老師豐富的調(diào)試方法，也是深深地讓我折服。目前，國內(nèi)外關(guān)于本供水系統(tǒng)方面的研究中，在能適應(yīng)不同的控制性能、PLC網(wǎng)絡(luò)通訊、用水場合多樣化、同時(shí)兼顧系統(tǒng)自動(dòng)化程度等方面還有一定的提高空間。由于設(shè)計(jì)了組態(tài)監(jiān)控界面，工作人員不需要頻繁在一線操作，還可以實(shí)現(xiàn)遠(yuǎn)程監(jiān)控。該系統(tǒng)按實(shí)際需要,使用數(shù)據(jù)傳送指令，在梯形圖程序中設(shè)定壓力給定值，根據(jù)壓力差調(diào)整水泵的工作情況，進(jìn)行水泵的工頻/變頻控制，高壓時(shí)水泵工作方式的切換甚至停止，發(fā)生火災(zāi)時(shí)，輔助泵的工頻啟動(dòng)，實(shí)現(xiàn)恒壓供水。右鍵單擊右邊窗口，然后創(chuàng)建一個(gè)新變量，選擇變量的類型，最后保存即可。工程瀏覽器：用于創(chuàng)建監(jiān)控畫面、監(jiān)控設(shè)備以及相關(guān)變量、動(dòng)畫鏈接、命令語言及設(shè)定運(yùn)行系統(tǒng)配置[2]。首先進(jìn)行手動(dòng)模式調(diào)試，、。本次設(shè)計(jì)，PID運(yùn)算部分采用的便是后者，具體梯形圖程序如附錄1所示。1泵的控制程序主要控制1泵的運(yùn)行、停止和變頻調(diào)速，；2泵的控制程序主要控制1泵的運(yùn)行、停止和變頻調(diào)速，；3泵作為消防用水輔助泵，它的控制程序主要控制3泵的運(yùn)行、停止和變頻調(diào)速，：自動(dòng)調(diào)節(jié)過程反饋值小于設(shè)定值？1泵運(yùn)行控制否是1泵變頻控制1泵工頻控制是啟動(dòng)PID運(yùn)算2泵運(yùn)行控制反饋值小于設(shè)定值？否是定時(shí)5s啟動(dòng)延時(shí)到？否是 1泵的控制程序流程圖否反饋值小于設(shè)定值？切除運(yùn)行于工頻的泵2泵運(yùn)行控制是2泵工頻控制2泵變頻控制啟動(dòng)PID運(yùn)算反饋值小于設(shè)定值？否是定時(shí)5s啟動(dòng)是否延時(shí)到？ 2泵的控制程序流程圖自動(dòng)調(diào)節(jié)過程反饋值大于設(shè)定值？3泵運(yùn)行控制否是3泵工頻控制斷開3泵工頻控制啟動(dòng)PID運(yùn)算否反饋值小于設(shè)定值？是定時(shí)5s啟動(dòng)是延時(shí)到？否 3泵的控制程序流程圖停止1水泵的工頻運(yùn)行程序：控制1泵在工頻運(yùn)行、2泵在變頻運(yùn)行狀態(tài)下時(shí)，壓力傳感器檢測的水壓在某個(gè)時(shí)間段持續(xù)偏高，這時(shí)候句需要停止工頻工作的1水泵。(5)管內(nèi)壓力仍大于設(shè)定值，斷開1泵；小于設(shè)定值，2泵變頻，1泵工頻。(1)系統(tǒng)上電后，按下自動(dòng)控制開關(guān)，進(jìn)入自動(dòng)模式。本系統(tǒng)的軟件開發(fā)采用順序功能圖設(shè)計(jì)法進(jìn)行，包括以下幾個(gè)程序模塊：(1)USS通訊協(xié)議程序；(2)控制按鍵、開關(guān)的識別與控制程序；(3)壓力傳感器的數(shù)據(jù)采集、處理程序；(4)PID回路控制程序。(3) 采用邏輯設(shè)計(jì)法的應(yīng)用程序設(shè)計(jì)：邏輯設(shè)計(jì)法是以邏輯組合或邏輯時(shí)序的形式來設(shè)計(jì)梯形圖程序，可分為組合邏輯設(shè)計(jì)法和時(shí)序邏輯設(shè)計(jì)法兩種[3]。PLC取代“繼電器接觸器”控制已是大勢所趨，然而原有的“繼電器接觸器”控制系統(tǒng)經(jīng)過了長期的使用和考驗(yàn)，已被證明完全能夠完成系統(tǒng)的控制功能要求[3]。熔斷器（FU）作為電路中的一種簡單的短路保護(hù)裝置,在使用中，當(dāng)電流超過允許值時(shí)，產(chǎn)生的熱量會把和主電路串接的熔體熔化，這樣就可以切斷電路，防止電氣設(shè)備短路和嚴(yán)重過載。 數(shù)字量輸出分配輸出地址輸出設(shè)備輸出地址輸出設(shè)備1泵工頻接觸器2泵變頻接觸器1泵變頻接觸器3泵工頻接觸器2泵工頻接觸器3泵變頻接觸器 MICROMASTER變頻器參數(shù)分配在本控制系統(tǒng)中，PLC和MICROMASTER變頻器采用了USS通信方式，首先需要對變頻器的參數(shù)進(jìn)行設(shè)置。該款水泵的技術(shù)參數(shù)如下：流量：24/h； 揚(yáng)程：60m；功率：； 吸程：6m；轉(zhuǎn)速：2900r/min；工作壓力：≤。由于居民生活用水存在高峰期，一般為12時(shí)到2時(shí)、19時(shí)到21時(shí)，總共5個(gè)小時(shí)，則水泵的最大流量為120247。，可以算出人均日生活用水量為：247。輸送流量直接關(guān)系到整個(gè)系統(tǒng)的運(yùn)行能力。因此，我們可以把它用于更高級的電動(dòng)機(jī)控制系統(tǒng)，前提是設(shè)置電機(jī)的額定電壓、功率、轉(zhuǎn)速以及USS通訊部分的相關(guān)參數(shù)。[3]。根據(jù)以上的功能分析和方案設(shè)計(jì)，可以得出，系統(tǒng)總體設(shè)計(jì)框圖如下：PLC操作面板水泵組變頻器壓力傳感器輸入模擬量輸入