TLY-A220T-HK62AY

TLY-A220T-HK62AY;
TLY-A220T-HK62AY現(xiàn)貨；
TLY-A220T-HK62AY供應(yīng)。

擴(kuò)展模塊的選用

對于小的系統(tǒng)，如80點(diǎn)以內(nèi)的系統(tǒng)．一般不需要擴(kuò)展；當(dāng)系統(tǒng)較大時，就要擴(kuò)展。不同公司的產(chǎn)品，對系統(tǒng)總點(diǎn)數(shù)及擴(kuò)展模塊的數(shù)量都有限制，當(dāng)擴(kuò)展仍不能滿足 要求時，可采用網(wǎng)絡(luò)結(jié)構(gòu)；同時，有些廠家產(chǎn)品的個別指令不支持?jǐn)U展模塊，因此，在進(jìn)行軟件編制時要注意。當(dāng)采用溫度等模擬模塊時，各廠家也有一些規(guī)定，請 看相關(guān)的技術(shù)手冊。

各公司的擴(kuò)展模塊種類很多，如單輸入模塊、單輸出模塊、輸入輸出模塊、溫度模塊、高速輸入模塊等。 PLC的這種模塊化設(shè)計為用戶的產(chǎn)品開發(fā)提供了方便。


　　15) 先天下之憂而憂，后天下之樂而樂。(宋·范仲淹《岳陽樓記》)
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