描述
SDCS-IOB-23
全面提高程序的質(zhì)量，提高編程效率，使程序具有良好的可讀性、可靠性、可維護(hù)性以及良好的結(jié)構(gòu)，是每位程序設(shè)計者的目標(biāo)。IEC61131-3是國際電工委員會(IEC)于1999年推出的用于工業(yè)控制領(lǐng)域的標(biāo)準(zhǔn)化編程語言，具有開放性、可移植性、結(jié)構(gòu)化編程和結(jié)構(gòu)化數(shù)據(jù)、檢錯和糾錯能力強(qiáng)等特點，適用于plc編程。采用結(jié)構(gòu)化程序設(shè)計，便于構(gòu)造程序(尤其是復(fù)雜的程序)、多人設(shè)計，調(diào)試以及軟件管理。雖然軟件工程的思想已被絕大部分程序員所接受，但要將這種思想轉(zhuǎn)化為軟件開發(fā)過程中的自覺行為卻不是一件很容易的事。本文以西門子公司的S7-300/400系列大中型PLC為主要講授對象。西門子的PLC以其極高的性能價格比，在國際國內(nèi)市場占有很大的份額，在我國的各行各業(yè)得到了廣泛的應(yīng)用。S7-300/400屬于模塊式PLC，主要由機(jī)架、CPU模塊、信號模塊、功能模塊、接口模塊、通信處理器、電源模塊和編程計算機(jī)組成，各種模塊安裝在機(jī)架上。通過CPU模塊或通信模塊上的通信接口，PLC被連接到通信網(wǎng)絡(luò)，可以與計算機(jī)、其他PLC或其他設(shè)備通信。輸入(Input)模塊和輸出(Output)模塊簡稱為I/O模塊，開關(guān)量輸入、開關(guān)量輸出模塊簡稱為DI模塊和DO模塊，模擬量輸入、模擬量輸出模塊簡稱為AI模塊和AO模塊，它們統(tǒng)稱為信號模塊。信號模塊是系統(tǒng)的眼、耳、手、腳，是聯(lián)系外部現(xiàn)場設(shè)備和CPU模塊的橋梁。
產(chǎn)品承諾：
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時發(fā)貨，
保?證售后服務(wù)質(zhì)量，
優(yōu)勢價格，大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌：ABB???,AB??,GE,FOXBORO,本特利，英維思，伍德沃德，西屋，瑞恩，施耐德，西門子，摩托羅拉，安川。力士樂。ACSO，橫河等進(jìn)口品牌。 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA ? 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家
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專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊
PLC模塊，可編程控制器，CPU模塊，IO模塊，AI模塊，通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅
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