描述
IC754VSI06STD
西門子CPU226和CPU224XP標(biāo)準(zhǔn)配置2個485口即PPI口，最大通訊速度187.5K；而三菱FX3U之前的所有系列都是一個422口，而且速度是9.6K。如果需要連個智能儀表什么的則必須另購FX2N0-485BD等特殊模塊。而且兩個通信口可以一個連接下載數(shù)據(jù)線一個連接觸摸屏進(jìn)行調(diào)試程序，否則你就要拔下觸摸屏數(shù)據(jù)線再連接觸摸屏數(shù)據(jù)線，來回調(diào)整程序非常麻煩。技成培訓(xùn)值得你關(guān)注：jcpeixun
控制的強項不同
西門子的強項是過程控制與通信控制，西門子的模擬量模塊價格便宜，程序簡單，而三菱的模擬量模塊價格昂貴，程序復(fù)雜，西門子做通信也容易，程序簡單，三菱在這塊功能較弱。
三菱的優(yōu)勢在于離散控制和運動控制，三菱的指令豐富，有專用的定位指令，控制伺服和步進(jìn)容易實現(xiàn)，要實現(xiàn)某些復(fù)雜的動作控制也是三菱的強項，而西門子在這塊就較弱，沒有專用的指令，做伺服或步進(jìn)定位控制不是不能實現(xiàn)，而是程序復(fù)雜，控制精度不高。例如某設(shè)備只是些動作控制，如機械手，可選擇三菱的PLC，某設(shè)備有伺服或步進(jìn)要進(jìn)行定位控制，也選三菱的PLC。像中央空調(diào)，污水處理，溫度控制等這類有很多模擬量要處理的就要選西門子的PLC比較合適，某設(shè)備現(xiàn)場有很多儀表的數(shù)據(jù)要用通信進(jìn)行采集，選西門子的好控制。
所以針對不同的設(shè)備不同的控制方式，我們要合理的選用PLC，用其長處，避其短處。
產(chǎn)品承諾：
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時發(fā)貨，
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優(yōu)勢價格，大量現(xiàn)貨。
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