BMXNOR0200H施耐德產(chǎn)品
其研發(fā)目的在于取代以繼電器為主之順序控制,亦即使用軟件程序以取代硬件配線,因此祇要改變其軟件程序即可改變其控制的順序,而輕易的達(dá)成控制上之不同需求。
一般的PLC系以傳統(tǒng)繼電器控制回路為基礎(chǔ)發(fā)展而來,并將繼電器的接點(diǎn)和線圈予以符號(hào)化,當(dāng)轉(zhuǎn)換成一般的階梯圖或指令之后,即可實(shí)現(xiàn)其控制。
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