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廈門市泰尼電器有限公司
主營(yíng)產(chǎn)品： AB模塊PLC |
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廈門市泰尼電器有限公司
主營(yíng)產(chǎn)品： AB模塊PLC |
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更新時(shí)間：2018-03-04 03:07:47瀏覽次數(shù)：523
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140CPS42400~~~140CPS42400
~~~
內(nèi)部繼電器多，便于PLC建立復(fù)雜的時(shí)序關(guān)系，以實(shí)現(xiàn)多種多樣的控制要求。一般講，內(nèi)部繼電器數(shù)比I/O繼電器要多得多。有的內(nèi)部繼電器還可丟電保持，即它的狀態(tài)（ON或OFF）、PLC丟電后，靠?jī)?nèi)部電池仍予以保持。再上電后可繼續(xù)丟電前的狀態(tài)。保持繼電器可增強(qiáng)PLC控制能力，特別對(duì)記錄故障，故障排除后恢復(fù)運(yùn)行，更顯得有用。定時(shí)器，可進(jìn)行定時(shí)控制。
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