西門子PLC模塊6
可編程控制裝置是由現(xiàn)代化生產(chǎn)的需求而產(chǎn)生的，可編程序控制裝置的分
西門子PLCS7-200系列西門子PLCS7-200系列
類也必然要達(dá)到現(xiàn)代化生產(chǎn)的需求。
一般來(lái)講可以從三個(gè)角度對(duì)可編程序控制裝置進(jìn)行分類。其一是從可編程序控制裝置的控制規(guī)模大小去分類，其二是從可編程序控制裝置的性能高低去分類，其三是從可編程序控制裝置的結(jié)構(gòu)特點(diǎn)去分類。
控制規(guī)模
一般分為大型機(jī)、中型機(jī)和小型機(jī)。
西門子PLCS7-300系列西門子PLCS7-300系列
小型機(jī): 小型機(jī)的控制點(diǎn)一般在256點(diǎn)之內(nèi),適合于單機(jī)控制或小型系統(tǒng)的控制。
西門子小型機(jī)有S7-200：處理速度0.8~1.2ms ；存貯器2k ；數(shù)字量248點(diǎn)；模擬量35路 。
中型機(jī):中型機(jī)的控制點(diǎn)一般不大于2048點(diǎn),適用于對(duì)設(shè)備進(jìn)行直接控制，也能對(duì)多個(gè)下一級(jí)的可編程序控制裝置進(jìn)行監(jiān)控，它適合中型或大型操作系統(tǒng)的控制。
西門子中型機(jī)有S7-300：處理速度0.8~1.2ms ；存貯器2k ；數(shù)字量1024點(diǎn)；模擬量128路 ；網(wǎng)絡(luò)PROFIBUS；工業(yè)以太網(wǎng)；MPI。
大型機(jī)：大型機(jī)的控制點(diǎn)一般大于2048點(diǎn),不單能完成比較復(fù)雜的算術(shù)運(yùn)
西門子PLCS7-400系列西門子PLCS7-400系列
算還能進(jìn)行復(fù)雜的矩陣運(yùn)算。它不單適用于對(duì)設(shè)備進(jìn)行直接控制，也能對(duì)多個(gè)下一級(jí)的可編程序控制裝置進(jìn)行監(jiān)控。
西門子大型機(jī)有S7-400 ：處理速度0.3ms / 1k字；
存貯器512k ；I/O點(diǎn)12672；
控制性能
一般分為機(jī)、中檔機(jī)和低檔機(jī)。
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