產(chǎn)品精品  價(jià)格百年一遇6RB2000-0GB01

德西門子（SIEMENS）公司生產(chǎn)的可編程序控制器在我的應(yīng)用也相當(dāng)廣泛，在冶金、化工、印刷生產(chǎn)線等領(lǐng)域都有應(yīng)用。西門子（SIEMENS）公司的PLC產(chǎn)品包括LOGO，S7-200，S7-300，S7-400，工業(yè)網(wǎng)絡(luò)，HMI人機(jī)界面，工業(yè)軟件等。
西門子S7系列PLC體積小、速度快、標(biāo)準(zhǔn)化，具有網(wǎng)絡(luò)通信能力，功能更強(qiáng)，可靠性更高。S7系列PLC產(chǎn)品可分為微型PLC（如S7-200），小規(guī)模性能要求的PLC（如S7-300）和中、高性能要求的PLC（如S7-400）等。
1．SIMATIC S7-200 PLC
S7-200 PLC是超小型化的PLC，它適用于各行各業(yè)，各種場合中的自動(dòng)檢測、監(jiān)測及控制等。S7-200 PLC的強(qiáng)大功能使其無論單機(jī)運(yùn)行，或連成網(wǎng)絡(luò)都能實(shí)現(xiàn)復(fù)雜的控制功能。
    S7-200PLC可提供4個(gè)不同的基本型號(hào)與8種CPU可供選擇使用。
2．SIMATIC S7-300 PLC
    S7-300是模塊化小型PLC系統(tǒng)，能滿足中等性能要求的應(yīng)用。各種單獨(dú)的模塊之間可進(jìn)行廣泛組合構(gòu)成不同要求的系統(tǒng)。與S7-200 PLC比較，S7-300 PLC采用模塊化結(jié)構(gòu)，具備高速（0.6~0.1μs）的指令運(yùn)算速度；用浮點(diǎn)數(shù)運(yùn)算比較有效地實(shí)現(xiàn)了更為復(fù)雜的算術(shù)運(yùn)算；一個(gè)帶標(biāo)準(zhǔn)用戶接口的軟件工具方便用戶給所有模塊進(jìn)行參數(shù)賦值；方便的人機(jī)界面服務(wù)已經(jīng)集成在S7-300操作系統(tǒng)內(nèi)，人機(jī)對話的編程要求大大減少。SIMATIC人機(jī)界面（HMI）從S7-300中取得數(shù)據(jù)，S7-300按用戶指定的刷新速度傳送這些數(shù)據(jù)。S7-300操作系統(tǒng)自動(dòng)地處理數(shù)據(jù)的傳送；CPU的智能化的診斷系統(tǒng)連續(xù)監(jiān)控系統(tǒng)的功能是否正常、記錄錯(cuò)誤和特殊系統(tǒng)事件（例如：超時(shí)，模塊更換，等等）；多級(jí)口令保護(hù)可以使用戶高度、有效地保護(hù)其技術(shù)機(jī)密，防止未經(jīng)允許的復(fù)制和修改；S7-300 PLC設(shè)有操作方式選擇開關(guān)，操作方式選擇開關(guān)像鑰匙一樣可以拔出，當(dāng)鑰匙拔出時(shí)，就不能改變操作方式，這樣就可防止非法刪除或改寫用戶程序。具備強(qiáng)大的通信功能，S7-300 PLC可通過編程軟件Step 7的用戶界面提供通信組態(tài)功能，這使得組態(tài)非常容易、簡單。S7-300 PLC具有多種不同的通信接口，并通過多種通信處理器來連接AS-I總線接口和工業(yè)以太網(wǎng)總線系統(tǒng)；串行通信處理器用來連接點(diǎn)到點(diǎn)的通信系統(tǒng)；多點(diǎn)接口（MPI）集成在CPU中，用于同時(shí)連接編程器、PC機(jī)、人機(jī)界面系統(tǒng)及其他SIMATIC S7/M7/C7等自動(dòng)化控制系統(tǒng)。6RB2000-0GB01

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