【導(dǎo)讀】2.當(dāng)PLC運行時,[X12:計票開關(guān)]=OFF,則不執(zhí)行投票計算。成投票,請扳動X0~Xl1(如贊成:X:ON,若反對X:OFF。設(shè)計,提高理論知識工程應(yīng)用能力、系統(tǒng)調(diào)試能力、分析問題與解決問題的能力。PLC的結(jié)構(gòu)及各部分的作用·················································································5