1746-NO8V
1746-NO8V
1746-NO8V

盡管梯形圖與繼電器電路圖在結(jié)構(gòu)形式、元件符號(hào)及邏輯控制功能等方面相類似，但它們又有許多不同之處，梯形圖具有自己的編程規(guī)則。

1）每一邏輯行總是起于左母線，然后是觸點(diǎn)的連接，最后終止于線圈或右母線（右母線可以不畫出）。注意：左母線與線圈之間一定要有觸點(diǎn)，而線圈與右母線之間則不能有任何觸點(diǎn)。

2）梯形圖中的觸點(diǎn)可以任意串聯(lián)或并聯(lián)，但繼電器線圈只能并聯(lián)而不能串聯(lián)。

3）觸點(diǎn)的使用次數(shù)不受限制。

4）一般情況下，在梯形圖中同一線圈只能出現(xiàn)一次。如果在程序中，同一線圈使用了兩次或多次，稱為“雙線圈輸出”。對(duì)于“雙線圈輸出”，有些PLC將其視為語法錯(cuò)誤，不允許；有些PLC則將前面的輸出視為無效，只有最后一次輸出有效；而有些PLC，在含有跳轉(zhuǎn)指令或步進(jìn)指令的梯形圖中允許雙線圈輸出。

5）對(duì)于不可編程梯形圖必須 經(jīng)過等效變換，變成可編程梯形圖。
6）有幾個(gè)串聯(lián)電路相并聯(lián)時(shí)，應(yīng)將串聯(lián)觸點(diǎn)多的回路放在上方，如圖5-2a所示。在有幾個(gè)并聯(lián)電路相串聯(lián)時(shí)，應(yīng)將并聯(lián)觸點(diǎn)多的回路放在左方，如圖5-2b所示。這樣所編制的程序簡潔明了，語句較少。

備貨，備貨，降降降，火火火，火火火……

——————————————————————————————————————

公司名稱：廈門泰尼電氣有限公司

聯(lián)系人：小黃（銷售代表）

聯(lián)系電話：0592-6809319

傳真號(hào)碼：0592-6890859（麻煩備注01006收）

手機(jī)：18950191386

QQ號(hào)碼:2917675397

郵箱：2917675397@qq.com

誠信經(jīng)營，質(zhì)量為首，誠信至上，泰尼電氣小黃竭誠為您服務(wù)！！！

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