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樓主  發(fā)表于: 2013-12-14 12:31
從事plc編程工作有段時(shí)間了，但還不知道plc的兩個(gè)電位器是起什么作用的？高手能解答一下嗎？一直沒(méi)用過(guò)，也不知道該怎么用？
catfree
虛心向各位學(xué)習�。�！
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1樓  發(fā)表于: 2013-12-15 20:58
很黃很暴力的，可以通過(guò)寄存器變化做成密碼鎖
一日晚自習，化學(xué)老師批評一同學(xué)坐姿不好，問(wèn)他:“你見(jiàn)過(guò)哪個(gè)名人科學(xué)家是像你這樣坐的？”我隨口說(shuō)了一句:“霍金……” 然后就沒(méi)有然后了……一頓狠批啊

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