6ES79548LT030AA0
6ES79548LT030AA0
6ES79548LT030AA0
6ES79548LT030AA0
6ES79548LT030AA0
現(xiàn)場數(shù)據(jù)的獲取與動態(tài)顯示?！敖M態(tài)王”通過訪問板卡的I/O地址直接與其進(jìn)行數(shù)據(jù)交換。借助組態(tài)軟件的動畫連接功能，將采集溫度依低、中、高進(jìn)行劃分，并以不同的顏色表示；通過設(shè)置畫面閃爍來達(dá)到報(bào)警的目的。利用軟件的實(shí)時(shí)趨勢曲線快速反應(yīng)溫度隨時(shí)間的變化。
3.2網(wǎng)絡(luò)通信的實(shí)現(xiàn)
通信模塊主要是指系統(tǒng)在運(yùn)行中與HT－7總控和炮號服務(wù)器之間基于TCP/IP通信協(xié)議的數(shù)據(jù)傳輸。主要包括實(shí)時(shí)獲取總控對放電預(yù)設(shè)時(shí)間的更改以及每次放電開始時(shí)對本炮記錄號的讀取。
3.2.1組態(tài)王網(wǎng)絡(luò)通信的局限性
TCP/IP（傳輸控制協(xié)議/網(wǎng)間協(xié)議）是一種網(wǎng)絡(luò)通信協(xié)議。本系統(tǒng)在對TCP/IP的網(wǎng)絡(luò)應(yīng)用中，采用Client/Server模式，組態(tài)王在網(wǎng)絡(luò)功能上也是一種真正的Client/Server模式，可運(yùn)行在基于TCP/IP網(wǎng)絡(luò)協(xié)議的網(wǎng)絡(luò)上。然而，要實(shí)現(xiàn)組態(tài)王的網(wǎng)絡(luò)功能，則要求客戶機(jī)和服務(wù)器必須安裝并同時(shí)運(yùn)行組態(tài)王。由于本系統(tǒng)內(nèi)HT－7總控是基于VC＋＋軟件的，而炮號服務(wù)器則是在Linux操作系統(tǒng)下由C語言編程實(shí)現(xiàn)的。因此，僅通過組態(tài)王軟件的網(wǎng)絡(luò)功能，無法實(shí)現(xiàn)本系統(tǒng)的網(wǎng)絡(luò)通信。
3.2.2基于VB和DDE技術(shù)的解決方法
組態(tài)王軟件提供的DDE功能為解決這一問題提供了途徑。DDE是Windows操作系統(tǒng)提供的一種數(shù)據(jù)交換技術(shù)，是Windows環(huán)境下應(yīng)用程序之間進(jìn)行通訊的一種手段。它使得兩個(gè)應(yīng)用程序能夠自動連續(xù)地交換數(shù)據(jù)。組態(tài)王支持動態(tài)數(shù)據(jù)交換DDE，能夠和其他支持DDE的應(yīng)用程序方便地交換數(shù)據(jù)。通過DDE，工程人員可以利用PC機(jī)豐富的軟件資源來擴(kuò)充組態(tài)王的功能。
Visual Basic 6.0作為一種快速的Windows程序開發(fā)工具，同樣支持DDE應(yīng)用程序的開發(fā)，并且具有強(qiáng)大的網(wǎng)絡(luò)通信功能。本系統(tǒng)利用VB實(shí)現(xiàn)網(wǎng)絡(luò)通信，采用DDE方式將通信數(shù)據(jù)自動地傳送給組態(tài)王。實(shí)現(xiàn)了對組態(tài)王網(wǎng)絡(luò)功能的擴(kuò)充。
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