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					因?yàn)橐恍﹫?chǎng)合,沒有使用觸摸屏,要改變定時(shí)時(shí)間只能通過(guò)修改程序才能實(shí)現(xiàn),但這樣很麻煩,就有高人使用在8421拔碼開關(guān)外設(shè)延時(shí)時(shí)間,以方便根據(jù)控制的需要,最近廠里做了一臺(tái)機(jī)器,用到4個(gè)8421拔碼開關(guān),上升時(shí)間功能是能在0至99毫秒調(diào)節(jié):接法如上:個(gè)位拔碼開關(guān)的1接X0,   2接X1  , 4接X2,8接X3,公共端C接Y0
                                                                                                                                                 十位拔碼開關(guān)的1接X0,   2接X1  , 4接X2,8接X3,公共端C接Y1
                                                              下降時(shí)間功能是能在0至99毫秒調(diào)節(jié):接法如上:  個(gè)位拔碼開關(guān)的1接X0,   2接X1  , 4接X2,8接X3,公共端C   Y2                                                                                                                                                  十位拔碼開關(guān)的1接X0,   2接X1  , 4接X2,8接X3,公共端C接Y3
我知道要能BCD碼到2進(jìn)制變換指令BIN來(lái)編寫,但沒接觸過(guò),沒編寫經(jīng)驗(yàn),望師傅們前來(lái)幫助
