Bailey DCS卡件 INICT13A Symphony Infi-Net To Computer Transfer Module ICT13A infi-90
Bailey DCS卡件 INICT13A Symphony Infi-Net To Computer Transfer Module ICT13A infi-90
Bailey DCS卡件 INICT13A Symphony Infi-Net To Computer Transfer Module ICT13A infi-90
DCS分散控制系統(tǒng)，所說的DCS控制器有什么概念？和普通的控制器怎么樣區(qū)別？DCS的每個系統(tǒng)是不是獨立的系統(tǒng)，在網(wǎng)絡(luò)上又可以共享數(shù)據(jù)呢
答：理論上來說，DCS控制器和普通控制器沒有區(qū)別。有的廠家稱為DPU，分散式處理單元。功能上和PLC的CPU沒有多大區(qū)別。
和普通PLC有區(qū)別的是，功能塊執(zhí)行時常見的是固定速率掃描，如每隔500ms或250ms掃描一次。因此，多個功能塊的掃描時間相同時，必須設(shè)置相位參數(shù)，即盡可能不同時執(zhí)行。
其次很多DCS廠家的標(biāo)簽定義是按照功能塊的屬性進行定義的，和PLC廠家的地址的定義方式有些區(qū)別。
zui后，純粹的DCS系統(tǒng)（典型的是Honeywell和橫河等，西門子和ABB的屬于混合型的DCS產(chǎn)品）與現(xiàn)場IO之間都是采用10M或100M工業(yè)以太網(wǎng)方式進行通訊，DPU上也一般都集成冗余接口。
正常情況下，每個DCS系統(tǒng)是獨立的系統(tǒng)，可以在網(wǎng)絡(luò)上實現(xiàn)數(shù)據(jù)共享。
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