6ES7 222-1HF22-0XA8
6ES7 222-1HF22-0XA8
6ES7 222-1HF22-0XA8
6ES7 222-1HF22-0XA8
通過數(shù)據(jù)轉(zhuǎn)儲可以把實時數(shù)據(jù)庫中的值按照一定的周期轉(zhuǎn)存到關(guān)系數(shù)據(jù)庫中，這樣用戶就可以使用關(guān)系數(shù)據(jù)庫所提供的各種功能對數(shù)據(jù)進(jìn)行處理[3]。
在“數(shù)據(jù)轉(zhuǎn)儲組態(tài)”中設(shè)置數(shù)據(jù)源、表名稱、表類型、方向、周期等信息。
1.3 斷點續(xù)傳：
在生產(chǎn)指揮調(diào)度系統(tǒng)中，斷點續(xù)傳包括兩部分內(nèi)容，一部分是服務(wù)器與前置數(shù)據(jù)采集計算機(jī)之間，因為天然氣公司覆蓋范圍太廣泛，網(wǎng)絡(luò)跨度太大，經(jīng)常會出現(xiàn)前置數(shù)據(jù)采集計算機(jī)與服務(wù)器之間網(wǎng)絡(luò)中斷的情況，中斷以后現(xiàn)場實時生產(chǎn)數(shù)據(jù)就不能傳輸?shù)椒?wù)器中，斷點續(xù)傳功能很好地解決了這個問題：當(dāng)通訊發(fā)生故障時，前置數(shù)據(jù)采集計算機(jī)會自動為服務(wù)器保存數(shù)據(jù)，當(dāng)通訊恢復(fù)正常后，前置數(shù)據(jù)采集計算機(jī)會自動將數(shù)據(jù)恢復(fù)到服務(wù)器上，保證服務(wù)器數(shù)據(jù)完整，前置數(shù)據(jù)采集計算機(jī)保存數(shù)據(jù)量取決于組態(tài)時的設(shè)置。另外一方面，從前置數(shù)據(jù)采集計算機(jī)恢復(fù)到服務(wù)器中的數(shù)據(jù)，也要按照上層管理軟件的要求恢復(fù)到關(guān)系數(shù)據(jù)庫中，保證上層管理軟件數(shù)據(jù)的完整性[7]。
2、實時數(shù)據(jù)采集系統(tǒng)環(huán)境的設(shè)計
根據(jù)目前天然氣生產(chǎn)集輸現(xiàn)狀，在原有數(shù)據(jù)采集的基礎(chǔ)上開發(fā)實施了生產(chǎn)指揮調(diào)度系統(tǒng)，系統(tǒng)通過現(xiàn)場數(shù)據(jù)采集監(jiān)控網(wǎng)、系統(tǒng)優(yōu)化數(shù)字化平臺網(wǎng)，形成天然氣生產(chǎn)、集輸系統(tǒng)的數(shù)字化、信息化、網(wǎng)絡(luò)化監(jiān)控平臺，實現(xiàn)了遠(yuǎn)程數(shù)據(jù)信息共享和生產(chǎn)管理的實時調(diào)控,支持遠(yuǎn)程移動辦公和異地查詢。
2.1硬件環(huán)境及網(wǎng)絡(luò)環(huán)境
該系統(tǒng)的硬件部分大多利用原有的工控機(jī)實現(xiàn)，同時增加部分生產(chǎn)大隊的數(shù)據(jù)服務(wù)器和數(shù)據(jù)采集服務(wù)器，系統(tǒng)對硬件配置要求并不高；對于網(wǎng)絡(luò)環(huán)境而言，由于天然氣系統(tǒng)的特殊性，也決定了天然氣分公司網(wǎng)絡(luò)環(huán)境的復(fù)雜性，天然氣分公司的局域網(wǎng)基本上借助于公司下屬采油廠的網(wǎng)絡(luò)環(huán)境，并且有些裝置區(qū)、計量站隊偏遠(yuǎn)，無法接入油田公司局域網(wǎng)，所以在裝置區(qū)鋪設(shè)了光纖，搭建了分公司無線網(wǎng)，由無線網(wǎng)轉(zhuǎn)接到油公司局域。
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