Honeywell 620-0054
Honeywell 620-0054
Honeywell 620-0054
2.輸出階梯設(shè)計(jì)圖7b為輸出階梯,其結(jié)構(gòu)與圖4b相同,只是輔助繼電器編號(hào)不同而已。
結(jié)束語(yǔ)
上述4種PLC順序控制系統(tǒng)設(shè)計(jì)方法的共同特點(diǎn)是:
(1)由輸入繼電器控制輔助繼電器(包括由置位/復(fù)位指令和移位指令定義的輔助繼電器),按此構(gòu)成步進(jìn)階梯;
(2)由輔助繼電器控制輸出繼電器,以此構(gòu)成輸出階梯;
(3)無(wú)論步進(jìn)階梯還是輸出階梯,都是很有規(guī)律的回路結(jié)構(gòu)。不管要設(shè)計(jì)的順序控制系統(tǒng)有多少步,也不管其輸入輸出點(diǎn)數(shù)有多少,只要弄清各種設(shè)計(jì)方法所設(shè)計(jì)的步進(jìn)階梯和輸出階梯的回路結(jié)構(gòu)的規(guī)律性,根據(jù)設(shè)計(jì)依據(jù),套用其中任一種設(shè)計(jì)方法的回路結(jié)構(gòu),就能快速地一次成功設(shè)計(jì)出較復(fù)雜的PLC順序控制系統(tǒng)。
◆ 企業(yè)名稱:廈門泰尼電氣有限公司
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◆ 主營(yíng)業(yè)務(wù):DCS,PLC
◆ 經(jīng)營(yíng)模式: 貿(mào)易
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