廈門市泰尼電器有限公司
主營(yíng)產(chǎn)品: AB模塊PLC |
廈門市泰尼電器有限公司
主營(yíng)產(chǎn)品: AB模塊PLC |
參考價(jià) | 面議 |
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更新時(shí)間:2018-04-08 16:07:07瀏覽次數(shù):208
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【IC697ACC624】【IC697ACC624】
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S7-300有五種類型的定時(shí)器,三種類型的計(jì)數(shù)器。定時(shí)器與計(jì)數(shù)器的數(shù)量取決于CPU型號(hào)。定時(shí)器與計(jì)數(shù)器是PLC的重要編程元件,用于產(chǎn)生各種控制需要的時(shí)序,滿足各種控制要求。
1、延時(shí)通定時(shí)器指令
圖示延時(shí)通定時(shí)器(SD)。梯形圖中各輸入輸出端功能為:
S—起動(dòng)端,S7的定時(shí)器采用跳邊沿起動(dòng);
TV—設(shè)定值端,用于輸入定時(shí)器的設(shè)定值,設(shè)定值的數(shù)據(jù)類型是S5TIME,標(biāo)識(shí)符為S5T#;
R—復(fù)位端,當(dāng)R前面的RLO為1時(shí),定時(shí)器被復(fù)位清0;
Q—觸頭輸出端,受起動(dòng)端S控制;
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