
線路與梯形圖說(shuō)明如下:
將開(kāi)關(guān)qs閉合→x000常開(kāi)觸點(diǎn)閉合→定時(shí)器t0開(kāi)始3s計(jì)時(shí)→3s后,定時(shí)器t0動(dòng)作,t0常開(kāi)觸點(diǎn)閉合→定時(shí)器t1開(kāi)始3s計(jì)時(shí),同時(shí)y000得電,y0端子內(nèi)部硬觸點(diǎn)閉合,燈hl點(diǎn)亮→3s后,定時(shí)器t1動(dòng)作,t1常閉觸點(diǎn)斷開(kāi)→定時(shí)器t0復(fù)位,t0常開(kāi)觸點(diǎn)斷開(kāi)→y000線圈失電,同時(shí)定時(shí)器t1復(fù)位→y000線圈失電使燈hl熄滅;定時(shí)器t1復(fù)位使t1閉合,由于開(kāi)關(guān)qs仍處于閉合,x000常開(kāi)觸點(diǎn)也處于閉合,定時(shí)器t0又重新開(kāi)始3s計(jì)時(shí)。
以后重復(fù)上述過(guò)程,燈hl保持3s亮、3s滅的頻率閃爍發(fā)光。










