按圖1所示的控制流程，采用逐步得電逐步失電型順序控制系統(tǒng)設(shè)計(jì)法設(shè)計(jì)的步進(jìn)階梯如圖4a所示，其電路結(jié)構(gòu)與圖3的不同點(diǎn)之一是每步的失電由下一步輔助繼電器的常閉接點(diǎn)控制；之二是步1回路必須串聯(lián)步2至最后工作步4的輔助繼電器常閉觸點(diǎn)。以防電路工作時(shí)，因誤操作再次起動(dòng)而導(dǎo)致控制順序錯(cuò)亂。其余的電路結(jié)與圖3相同。
2．輸出階梯設(shè)計(jì)輸出階梯如圖4b所示，輸出繼電器的控制回路根據(jù)控制流程直觀確定。例如，輸出繼電器Y1要求在步1、3得電，則將步1、3的輔助繼電器M1、M3的常開觸點(diǎn)并聯(lián)，再與Y1的線圈串聯(lián)即可。其余輸出繼電器的控制回路構(gòu)成方法與此相同。
備貨，備貨，降降降，火火火，火火火……
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公司名稱：廈門泰尼電氣有限公司
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