【正文】 and counters. The same is true for a person with a digital logic background. For persons unfamiliar with ladder diagrams or digital principles, howere, the learning process takes more time.A person knowledgeable in relay logic can master advanced PLC functions in a few days with proper instruction. Company schools and operating manuals are very helpful in mastering these advanced functions. Advanced functions in order of learning might include sequence/drum controller, register bit use, and more functions.Following are 8 major advantages of using a programmable controller.①Flexibility. In the past, each different electronically controlled production machine required own controller。 At the same time, some manufacturers of individual products do not support the expansion module directives, in software development, we must pay attention to. When using such simulation module temperature, some of the manufacturers, see related technical manuals. Many types of panies expansion modules, such as singleinput modules, single output modules, input output modules, temperature modules, highspeed input module. This modular design Plc product development provided for the convenience of users.When using a Plc network design, its much more difficult to control than single Plc. First you should choose their own more familiar type, its basic instructions and a more indepth understanding of the functional mands, and the speed and direction of the implementation of storage capacity users should also be careful about the procedure. Otherwise, you can not adapt to the realtime requirements, resulting in the collapse of the system. In addition to munications interfaces, munication protocols, data transmission speed should also be considered. Finally, we must seek to Plc businessmen network design and software technical support and detailed technical information for the selection of several workstations in your system size.In the preparation of the software, should first bee familiar with the use of Plc software products specification, the question skilled later programming. If using graphical programming device or software package programming may direct programming, if using handheld programming device programming, should be painted Trapezoid Chart before programming, so can less mistakes speed was fast. After the first air conditioning programming procedures to be normal functioning of all, again in equipment debugging.PLC控制系統(tǒng)設(shè)計的要點(diǎn)可編程序控制器 (可設(shè)計的控制器) 本來應(yīng)簡稱個人計算機(jī)，為了與個人計算機(jī)的簡稱個人計算機(jī)相區(qū)別,一般將它簡稱為 PLC(可設(shè)計的邏輯控制器)。 微 PLC 數(shù)年以前進(jìn)入了市場，一些人認(rèn)為這些裝置降到最低點(diǎn)。重新規(guī)劃程序的 PLC 鍵盤代替了大量電線，繼電器, 讓轉(zhuǎn)換時間變成大約幾天。 PLC的市場已經(jīng)從1978 年八千萬元開始到1990年以每年十億元的幅度增長而且仍然正在增加。 學(xué)校和操作手冊在掌握這些先進(jìn)的功能方面非常有幫助。 當(dāng)改變一個 PLC 編程線路或序列設(shè)計的時候, PLC 編程能在數(shù)分鐘內(nèi)從鍵盤序列中改變。 增加的技術(shù)濃縮較多的功能為較小的和不貴的包。當(dāng)他們被激活時，邏輯路徑在熒屏上顯示。 PLC 編程被一個電學(xué)家或技術(shù)人員在梯型圖中完成。不同的負(fù)載選用不同的輸出方式，對系統(tǒng)的穩(wěn)定運(yùn)行是很重要的。 用IBM個人計算機(jī)加PLC軟件包編程，這種方式是效率最高的一種方式，但大部分公司的PLC開發(fā)軟件包價格昂貴，并且該方式不易于現(xiàn)場調(diào)試。 當(dāng)用PLC進(jìn)行網(wǎng)絡(luò)設(shè)計時，其難度比PLC單機(jī)控制大得多。否則，不能適應(yīng)你的實時要求，造成系統(tǒng)崩潰。 ⑤盡量選用大公司的產(chǎn)品其質(zhì)量有保障，且技術(shù)支持好，一般售后服務(wù)也較好，還有利于你的產(chǎn)品擴(kuò)展與軟件升級。目前還未發(fā)現(xiàn)各公司之間完全兼容的產(chǎn)品。在現(xiàn)代化的工業(yè)生產(chǎn)設(shè)備中，有大量的數(shù)字量及模擬量的控制裝置，例如電機(jī)的起停，電磁閥的開閉，產(chǎn)品的計數(shù)，溫度、壓力、流量的設(shè)定與控制等，工業(yè)現(xiàn)場中的這些自動控制問題，若采用可編程序控制器（PLC）來解決自動控制問題已成為最有效的工具之一，本文敘述PLC控制系統(tǒng)設(shè)計時應(yīng)該注意的問題。先進(jìn)的 PLC 系統(tǒng), 對于每個可能的故障都能描述其操作信息。⑤容易調(diào)試。③大量的接觸器。以下是使用一個可編程控制器的 8 個主要優(yōu)點(diǎn)。PLCs 也