MDD090C-N-030-N2L-110GR0制造企業(yè)傾向于采用一種公用的平臺解決方案，以代替不同系統(tǒng)單元連接和各自擁有的總線。DCS和PLC系統(tǒng)的工程功能始終處于分離的位置，并根據(jù)不同的訪問控制模式進(jìn)行必要的改變，這主要是因?yàn)橐恢笔艿絺鹘y(tǒng)的系統(tǒng)總線概念的影響?？梢酝ㄟ^以太網(wǎng)設(shè)備那樣的通用通信平臺，從而采用單一的工程工作站來配置DCS和PLC系統(tǒng)，這樣也可使公用報(bào)警和事故監(jiān)控系統(tǒng)安裝在單一的位置上，以避免租用昂貴的第三方設(shè)備來完成源自DCS和PLC兩大系統(tǒng)的數(shù)據(jù)流匯總。通用工程工作站概念有利于公認(rèn)的標(biāo)準(zhǔn)編程語言(I E C 61134)成為主流語言。PLC與DCS這兩種系統(tǒng)在配置的方式上(例如在功能塊方面)有許多共同的特點(diǎn)，這為培訓(xùn)人員降低費(fèi)用方面鋪平了道路。事實(shí)上，DCS和PLC系統(tǒng)的操作員通用工作站正在不斷地得到重視。MDD090C-N-030-N2L-110GR0至今為止，DCS和PLC系統(tǒng)之間的傳統(tǒng)串行接口—Modbus RTU 協(xié)議接口繼續(xù)延長向PLC開放，以便從DCS系統(tǒng)提取數(shù)據(jù)后做進(jìn)一步處理。在大部分情況下，PLC將能夠從DCS系統(tǒng)進(jìn)行“閱讀”，但不用于作為對DCS 系統(tǒng)的“寫入”。這是因?yàn)槌藬?shù)據(jù)的傳輸速度之外，當(dāng)數(shù)據(jù)從PLC寫入DCS系統(tǒng)時(shí)，通信數(shù)據(jù)的丟失也可能會影響過程的控制功能。PLC和DCS系統(tǒng)之間的接口通常通過一個位于DCS系統(tǒng)終端的附加“網(wǎng)關(guān)”硬件來完成。最新的發(fā)展趨勢是將DCS和PLC系統(tǒng)建立在像以太網(wǎng)那樣的公用平臺上，并使用 TCP/IP協(xié)議進(jìn)行數(shù)據(jù)交換。這樣，不但可省去DCS系統(tǒng)終端的附加硬件，而且還可以保證以更高的速度來傳輸系統(tǒng)之間的數(shù)據(jù)，并將這些數(shù)據(jù)更可靠地建立在系統(tǒng)之中。MDD090C-N-030-N2L-110GR0我們可以想象，具有共同功能特性、應(yīng)用于不同場合的DCS系統(tǒng)和PLC設(shè)置到同一“底板”上，更大地發(fā)揮兩大系統(tǒng)相互之間的潛力。MDD090C-N-030-N2L-110GR0
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