CPU包括由運(yùn)算器、控制器、寄存器及建立它們之間關(guān)聯(lián)的、控制及狀態(tài)總線組成，CPU單元還涵蓋外圍芯片、總線接口及有關(guān)電路。內(nèi)存關(guān)鍵用于儲(chǔ)存程序及，是PLC*的構(gòu)成模塊。

現(xiàn)在社會(huì)由于能源的匱乏我們提倡節(jié)約用電。就家庭用電來(lái)說(shuō)我們節(jié)約用電可以通過(guò)兩個(gè)方面來(lái)實(shí)現(xiàn)。一是通過(guò)使用電能轉(zhuǎn)換效率高的設(shè)備實(shí)現(xiàn)節(jié)能;二是通過(guò)控制用電設(shè)備的使用方法,來(lái)實(shí)現(xiàn)節(jié)能的化[1]。種方法一般是在用電設(shè)備研發(fā)過(guò)程中實(shí)現(xiàn),國(guó)家有相關(guān)的節(jié)能標(biāo)準(zhǔn)。按照國(guó)家相關(guān)規(guī)定,我國(guó)的能效標(biāo)志分為五個(gè)等級(jí)。低于等級(jí)五的用電設(shè)備是不允許

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