【正文】 meters only of deliver the distance, if in the distance of 1000 meters we can pass the RS485 to carry on the correspondence, the longer distance can pass the MODEL only to carry on deliver. The PLC data transmission is just to be called a form to it in a piece of and continuous address that the data of the inner part delivers the other party, we, the PLC of the other party passes to read data in the watch to carry on the operation. If the data that data in the watch is a to establish generally, that is just the general data transmission, for example today of oil price rise, I want to deliver the price of the oil price to lose the oil ally on board, that is the share of the data。 But whole pair works is both can send out and accept the data, and can send out and accept at the same time. Be like the Inter is a typical example. The process that information transport also has synchronous and different step cent: The data line and the clock lines are synchronous when synchronous meaning lie in sending out the data, is also the data signal and the clock signals to be carry on by the CPU to send out at the same time, this needs to all want the specialized clock signal each other to carry on the transmission and connect to send, and is constrained, the characteristics of this kind of method lies in its speed very quick, but correspond work time of take up the CPU and also want to be long oppositely, at the same time the technique difficulty also very big. Its request lies in canting have an error margins in a dates deliver, otherwise the whole piece according to pare the occurrence mistake, this on the hardware is a bigger difficulty. Applied more and more extensive in some appropriative equipments, be like the appropriative medical treatment equipments, the numerical signal equipments...etc., in pare the one data deliver, its result is very good. And the different step is an application the most extensive, this receive benefit in it of technique difficulty is opposite and want to be small, at the same time not need to prepare the specialized clock signal, its characteristics to lie in, its data is partition, the longlost send out and accept, be the CPU is too busy of time can grind to a stop sex to work, also reduced the difficulty on the hardware, the data throw to lose at the same time opposite want to be little, we can pass the examination of the data to observe whether the data that we send out has the mistake or not, be like strange accidentally the method, tired addition and eight efficacies method etc., can use to helps whether the data that we examine to send out have or not the mistake occurrence, pass the feedback to carry on the discriminator. A line of transmission of the information contains a string of and bine the cent of: The usual PLC is 8 machines, certainly also having 16 machines. We can be an at the time of sending out the data a send out to the other party, also can be 88 send out the data to the other party, an and 8 differentiations are also the as that we say to send out the data and bine sends out the data. A speed is more and slowly, but as long as 2 or three lines can solve problem, and can use the telephone line to carry on the long range control. But bine the ocular transmission speed is very quick of, it is a string of ocular of 25600%, occupy the advantage in the short distance, the in view of the fact TTL electricity is even, being limited by the scope of one meter generally, it bine unwell used for the data transmission of the long pull, thus the cost is too expensive. Under a lot of circumstances we are total to like to adopt the string to bine the conversion chip to carry on deliver, under this kind of circumstance not need us to carry on to deposited the machine to establish too and plicatedly, but carry on the data exchanges through the data transmission instruction directly, but is not a very viable way in the correspondence, because the PLC of the other party must has been wait for your data exportation at the time of sending out the data, it can39。s power, the one who make operate reduces the otiose error. Currently the HMI factory is also more and more, the function is also more and more strong, the price is also more and more low, and the noodles of the usage are wide more and more. The HMI foreground can say that think 176。s brain and calculators, with the mode that person39。可編程控制其配置、編程、聯(lián)網(wǎng) [M] 北京：機(jī)械工業(yè)出版社， 2021 【 6】 張萬忠，劉明芹北京：高等教育出版社， 2021 年 【 2】 王永華 它的出現(xiàn)將極大的方便人們購買所需要的小商品 。基于我們本學(xué)期所學(xué)習(xí)的 PLC 課程，我們自己嘗試著編寫了程序。網(wǎng)絡(luò)35 是無操作找 零燈亮。網(wǎng)絡(luò) 5 是食品五角閃爍控制。如果有“能流”從左至右流向線圈，則線圈被激勵(lì)。 梯形圖（ LAD） 什 么是梯形圖（ LAD） 梯形圖是用的最多的 PLC 圖形編程語言。還要有貨幣識(shí)別系統(tǒng)和貨幣的傳動(dòng)來實(shí)現(xiàn)完整的售貨、退幣功能。 自動(dòng)售貨機(jī)的基本功能 自動(dòng)售貨機(jī)的各種動(dòng)作功能和控制要求，給出了完整的自動(dòng)售貨機(jī)操作規(guī)程（如圖 31），并介紹了自動(dòng)售貨機(jī)運(yùn)行系統(tǒng)中所包括的人工操作步驟。 （ 7）易于實(shí)現(xiàn)網(wǎng)絡(luò)化 PLC 可連成功能很強(qiáng)的網(wǎng)絡(luò)系統(tǒng)。 圖 23 PLC 硬件結(jié)構(gòu)圖 PLC 的編程語言 PLC 為用戶提供了完善的編程語言來滿足編制用戶程序要求。 PLC 的循環(huán)掃描工作 對(duì)每個(gè)程序， CPU 從第一條指令開始執(zhí)行，按指令步序號(hào)做周期性的程序循環(huán)掃描，如果無跳轉(zhuǎn)指令，則從則從第一條指令開始逐條順序執(zhí)行用戶程序，直至遇到結(jié)束符后又返回第一條指令，如此周而復(fù)始不斷循環(huán)，每一個(gè)循環(huán)稱為一個(gè)掃描周期。日本的幾個(gè)廠家為三菱、富士。它的種類很多、模塊豐富、指令功能強(qiáng)大、編程簡(jiǎn)單、使用方便，而且隨著計(jì)算機(jī)技術(shù)的發(fā)展，其功能仍然在不斷擴(kuò)大和完善。 自動(dòng)售貨機(jī)可以充分補(bǔ)充人力資源的不足，適應(yīng)消費(fèi)環(huán)境和消費(fèi)模式的變化， 24 小時(shí)無人售貨的系統(tǒng)可以更省力，運(yùn)營(yíng)時(shí)需要的資本少、面積小，有吸引人們購買好奇心的自 身性能，可以很好地解決人工費(fèi)用上升的問題等各項(xiàng)優(yōu)點(diǎn)。同時(shí)售貨機(jī)的一些故障信息和警報(bào)信息可以實(shí)時(shí)的傳送到相應(yīng)運(yùn)營(yíng)人員，從而可以在第一時(shí)間內(nèi)發(fā)現(xiàn)并解決問題。在日本， 70％的罐裝飲料是 通過自動(dòng)售貨機(jī)售出的；全球著名飲料商可口可樂公司在全世界就布有 50 萬臺(tái)飲料自動(dòng)售貨機(jī)。具體說明了可編邏輯控制器在自動(dòng)售貨機(jī)中的作用。介紹了自動(dòng)售貨機(jī)的基本原理以及工作流程去幫助大家理解，然后把程序分為幾個(gè)程序塊，分別對(duì)程序塊進(jìn)行編程。它又被稱為 24 小時(shí)營(yíng)業(yè)的微型超市。 本系 統(tǒng)的設(shè)計(jì)和實(shí)現(xiàn)可以使自動(dòng)售貨機(jī)的經(jīng)營(yíng)者可以根據(jù)網(wǎng)絡(luò)統(tǒng)計(jì)的銷售狀況進(jìn)行商品銷售狀況分析，預(yù)測(cè)商品的銷售走勢(shì)，確定合理的采購和配送策略，以期獲得最高的投資回報(bào)率。這個(gè)現(xiàn)象都表明在物質(zhì)生活提高的同時(shí)，精神生活也提高了，隨處可見的出租車，還有隨處可見的售貨機(jī)，這在繁華的都市也已成為不可缺少的一個(gè)為市民提供方便的一部機(jī)器，只需要投幾個(gè)硬幣就可以選擇自己想要的物品。 PLC 是專門為在工業(yè)環(huán)境下應(yīng)用而設(shè)計(jì)的一種數(shù)字運(yùn)算操作的電子裝置，是帶有存儲(chǔ)器、可以編制程序的控制器。目前，世界上生產(chǎn) PLC 的主要廠家有 65 個(gè)，其中最有名氣的廠家在日本、美國(guó)和德國(guó)。但是 PLC 也有它自己的特點(diǎn)， PLC 在 確定了工作任務(wù)，裝入了專用程序后成為一種專用機(jī)，它采用循環(huán)掃描工作方式，系統(tǒng)工作任務(wù)管理及應(yīng)用程序執(zhí)行都是用循環(huán)掃描方式完成的。其中， CPU 是 PLC 的核心；輸入單元 /輸出單元是 CPU 與現(xiàn)場(chǎng)輸入 /輸出設(shè)備之間的接口電路；通信接口用于連接編程器、上位計(jì)算機(jī)等外部設(shè)備，其硬件構(gòu)成