1756-OF8
1756-OF8
1756-OF8
有了上述過程,用PLC實(shí)現(xiàn)控制顯然是可能的。因?yàn)椋河辛溯斎胨⑿?,可把輸入電路監(jiān)視得到的輸入信息存入PLC的輸入映射區(qū);經(jīng)運(yùn)行用戶程序,輸出映射區(qū)將得到變換后的信息;再經(jīng)輸出刷新,輸出鎖存器將反映輸出映射區(qū)的狀態(tài),并通過輸出電路產(chǎn)生相應(yīng)的輸出。又由于這個(gè)過程是停止地循環(huán)反復(fù)地進(jìn)行著,所以,輸出總是反映輸入的變化。只是響應(yīng)的時(shí)間上,略有滯后。但由于PLC的工作速度很快,所以,這個(gè)“略有滯后”的時(shí)間是很短的,一般也就是幾毫秒、幾十毫秒,多也不會(huì)超過100到200毫秒。
Allen-Bradley 廈門泰尼電氣有限公司
Schneider 聯(lián)系人:劉上金(銷售代表)
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1756-OF8
1756-OF8
1756-OF8