置位線圈-(S)-置位和復(fù)位線圈是非保持性線圈,是用來保持(鎖定)一個參考地址(不論其為ON或?yàn)镺FF)的狀態(tài)(例如E1)。當(dāng)一置位線圈通流,其地址將停留為ON,直至通過對同一地址的復(fù)位線圈通電而復(fù)位(例如下例的E1)。就既定的地址而言.置位線圈將給轉(zhuǎn)換位寫人一個非定義結(jié)果(參考第二章“系統(tǒng)操作”中“轉(zhuǎn)換與超馳”的情況)。

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