R978916416驅動器
R978916416驅動器
R978916416驅動器
功能模塊設計係統中各功能模塊程序是完成一項具體任務的程序。在程序設計中大量採用子程序進行結構化設計,具有程序結構清晰、調試方便等優點。每一個子程序都是一個功能模塊,它們完成存放地址的初始化、採樣信號的處理、故障類型的判別、標志位的設定和觸摸屏內容的更新等功能。由於篇幅所限,僅以電動機電流動作值整定計算功能模塊為例作一介紹。
電動機過載、短路保護依賴電流互感器二次側的電流信號作為判斷依據,而電流互感器在大電流情況下會產生磁滯飽和現象,在小電流情況下產生的信號又會在不同程度上受其他檢測回路的影響。從電流互感器的特性曲線可以看出,取樣信號與一次側電流並不成嚴格的線性關係。因此,該特性曲線的準確程度,直接影響到保護動作的可靠性。為了計算出不同額定電流電動機的過流保護動作值,特編寫了這一功能模塊。該功能模塊利用了高速運算特性及豐富的比較指令,對電流值在不同區間,採用不同的擬合方程進行計算。
當負荷更換後,只需改變撥碼盤的值即可投入使用。下面是在識別外部參數變化時所應注意的問題:端的選通。用個輸出口來控制撥碼盤的%端顯然會使成本提高、佔用空間增加。撥碼盤的讀取。由於輸出口及的選通大約需要時間,因此,兩片撥碼盤之間的讀取時間間隔至少為。利用定時方式來讀取,不僅程序編寫冗長,而且++內定時器數量遠遠不夠。
定時中斷為解決這一問題提供了很好解決方案,不但節省了內部的定時器資源,而且編程簡單,同時又縮短了掃描周期,增強了結構監控的實時性。模擬信號的採樣該測控係統對模擬信號的採樣採用價格適中、高速位模擬量輸入模塊。它既帶有模擬量輸入濾波器,又能提供未經處理的數字值未經線性化或濾波,可根據信號處理的實際需要選擇數字或模擬濾波器。本係統共需處理,路模擬信號,在實時性允許的前提下,兼顧價格因素,選用一片多路轉換器和一塊轉換模塊來完成,路模擬信號的採樣。由於六回路電動機的額定參數有可能不同,因此在不同時刻接受到的模擬信號差異可能很大,如果通道選擇變換過快,本次信號會受到上次信號的強烈幹擾;如果通道選擇變換過慢,又會影響信號檢測的實時性。如實、準確地反映信號的變化,是本程序編寫的難點和重點。
控制器、溫度傳感器、溫度巡檢儀和冷卻風機等組成了一個閉環連續調節的自動控制係統。該係統能夠實現工頻與變頻兩種工況切換運行。正常運行,手動操作旋轉開關,切換到變頻運行,當變頻運行回路出現故障時,可切換回工頻運行工況。工頻運行即直接啟動電機,瞬時達到工業頻率50HZ。而變頻運行回路則是:變頻器通過PLC控制實現冷卻風機電機的軟啟動,避免啟動電流對電網的衝擊,減少了噪音;通過溫度傳感器檢測主電機線圈與電樞的溫度,經過溫度巡檢儀XMDA-16數據變換,反饋到PLC,再由PLC內部數據處理來控制變頻器,從而實現對電機的變頻調速。
冷卻風機電機變頻控制係統的應用,電氣控制與監測回路操作臺的旋轉開關選擇到變頻,啟停開關選擇到風機啟動位置,分別將PLC的I0.0和IO.1的數字輸入端,以及PLC的Q0.1輸出高電平到繼電器K2,K2吸合,其常開點閉合,並與接觸器KM2線圈吸合,形成一個變頻控制電氣回路。380V交流電輸入至變頻器進線側,通過變壓變頻輸出頻率的電壓到三相可變頻運行的電機。
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【主營產品】
1:Invensys Foxboro(福克斯波羅):I/A Series係統,FBM(現場輸入/輸出模塊)順序控制、梯形邏輯控制、事故追憶處理、數模轉換、輸入/輸出信號處理、數據通信及處理等。
2:Invensys Triconex: 冗餘容錯控制係統、基於三重模件冗餘(TMR)結構的現代化的容錯控制器。
3:Westinghouse(西屋): OVATION係統、WDPF係統、WEStation係統備件。
4:Rockwell Allen-Bradley: Reliance瑞恩、SLC500/1747/1746、MicroLogix/1761/1763/1762/1766/1764、CompactLogix/1769/1768、Logix5000/1756/1789/1794/1760/1788、PLC-5/1771/1785等。
5:Schneider Modicon(施耐德莫迪康):Quantum 140係列處理器、控制卡、電源模塊等。
6:ABB:工業機器人備件DSQC係列、Bailey INFI 90等。
7:Siemens(西門子):Siemens MOORE, Siemens Simatic C1,Siemens數控係統等。
8:Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等係列。
9:XYCOM:I/O 、VME板和處理器等。
10:GE FANUC(GE發那科):模塊、卡件、驅動器等各類備件。
11:Yaskawa(安川):伺服控制器、伺服馬達、伺服驅動器。
12:Bosch Rexroth(博世力士樂):Indramat,I/O模塊,PLC控制器,驅動模塊等。
13:Woodward(伍德沃德):SPC閥位控制器、PEAK150數字控制器。
14:工業機器人係統備件。
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