MHP36700++MHP36700
MHP36700++MHP36700在現(xiàn)代化的工業(yè)生產(chǎn)中,大量采用了可編程序控制系統(tǒng),可編程序控制器能在惡劣的工作環(huán) 境下正常工作,但其構(gòu)成的控制系統(tǒng)由于設(shè)計、安裝、干擾等因素有時會出現(xiàn)故障。有些問題是在系統(tǒng)設(shè)計時考慮不周造成的。根據(jù)實(shí)踐中的經(jīng)驗(yàn)和教訓(xùn),本文闡述可編程序控制系統(tǒng) 設(shè)計時應(yīng)注意的問題。1、一個系統(tǒng)中使用的成熟技術(shù)至少應(yīng)占到75%以上
“成熟技術(shù)”一是經(jīng)過一定的生產(chǎn)實(shí)踐考驗(yàn)的可編程控制器產(chǎn)品或類似設(shè)計,或者確定能在未來的生產(chǎn)實(shí)踐中,經(jīng)得起考驗(yàn);二是設(shè)計工作人員對于需要使用的技術(shù)要有經(jīng)驗(yàn)或有掌握它的能力。設(shè)計與配置一個可編程序控制系統(tǒng)選用的技術(shù)與設(shè)計方案切實(shí)可行。因?yàn)橐粋€生產(chǎn)過程控制系統(tǒng),一旦做出來,要長久使用下去,難以找到機(jī)會反復(fù)修改。設(shè)計的硬件系統(tǒng)和編程軟件,其中某些缺欠,可能一直隱藏在已完成的系統(tǒng)中。若遇到發(fā)生破壞作用的條件,后果難以預(yù)料。~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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