機械外文翻譯文獻翻譯--使用labview中的tcpip和udp協(xié)議-其他專業(yè)-展示頁
2025-01-31 06:13本頁面
【正文】 候新的連接時，用 TCP 關(guān)閉連接功能區(qū)關(guān)閉一個聽者。 用第二種技術(shù)的優(yōu)勢是你能使用 TCP 關(guān)閉連接功能來取消聽操作，這在你想要為了一種連接聽而沒有超時，但是你想要取消當(dāng)另一個條件變真時的聽時是很有用的。 當(dāng)你建立一種連接時，用 TCP 讀功能和 TCP 寫功能能在遠程應(yīng)用中隊數(shù)據(jù)進行讀寫。如果沒被讀的仍保留著而關(guān)閉連接，你可能失去數(shù)據(jù)。在連接被關(guān)閉后，你不 能再讀寫它。 UDP 是高性能的無需連接的協(xié)議，但是它不保證可靠性。 完成如下步驟使用 TCP 功能建立一個 TCP 顧客。你必須規(guī)定服務(wù)器的因特網(wǎng)地址和服務(wù)器的端口。遠程端口在服務(wù)器使用聽的計算機上識別一個通信通道。 2. 用 TCP的寫功能把信息發(fā)送到服務(wù)器上。你必須規(guī)定你想讀的字節(jié)數(shù)。 請參閱 labview\examples\m\ 中對單一數(shù)據(jù)客戶端的 TCP 例程。例如，如果服務(wù)器被毀，確定如何使每個客戶 VI 程序掌控它。如果發(fā)生沒能在一定量的時間之后生產(chǎn)結(jié)果，客戶端繼續(xù)執(zhí)行。如果必要的話，客戶端 VI 程序能關(guān)閉應(yīng)用程序。 完全如下步驟用 TCP 功能來建立一個 TCP 服務(wù)器。你必須規(guī)定端口。 2. 如果連接被建立，用 TCP讀功能從接受到信息的端口讀信息。數(shù)據(jù)必須是一種客戶端能接受的形式。 請參閱 labview\examples\m\ 中對單一數(shù)據(jù)客戶端的 TCP 例程。 機械專業(yè)中英文文獻翻譯 6 Application Note 160 Using LabVIEW? with TCP/IP and UDP Introduction Inter Protocol (IP), User Datagram Protocol (UDP), and Transmission Control Protocol (TCP) are basic tools for work munication. The name TCP/IP es from two of the bestknown protocols of the Inter protocol suite, the Transmission Control Protocol and the Inter Protocol. You can use TCP/IP to municate over single works or interconnected works. The individual works can be separated by large geographical distances. TCP/IP routes data from one work or Interconnected puter to another. Because TCP/IP is available on most puters, it can transfer information among diverse systems. LabVIEW and TCP/IP You can use the TCP/IP protocols with LabVIEW on all platforms. LabVIEW includes TCP and UDP VIs and functions you can use to create client or server VIs. IP IP performs the lowlevel service of moving data between puters. IP packages data into ponents called datagrams. A datagram contains the data and a header that indicates the source and destination addresses. IP determines the correct path for the datagram to take across the work or Inter and sends the data to the specified destination. IP cannot guarantee delivery. In fact, IP might deliver a single datagram more than once if the datagram is duplicated in transmission. Programs rarely use IP but use TCP or UDP instead. UDP UDP provides simple, lowlevel munication among processes on puters. Processes municate by sending datagrams to a destination puter or port. A port is the location where you send data. IP handles the putertoputer delivery. After the datagram reaches the destination puter, UDP moves the datagram to its destination port. If the destination port is not open, UDP discards the datagram. UDP shares the same delivery problems of IP. Use UDP in applications in which reliability is not critical. For example, an application might transmit informative data to a destination frequently enough that a few lost segments of data are not problematic. 機械專業(yè)中英文文獻翻譯 7 LabVIEW?, National Instruments?, and ? are trademarks of National Instruments Corporation. Product and pany names mentioned herein are trademarks or trade names of their respective panies. For patents covering National Instruments products, refer to the appropriate location: Help187。 2021–2021 National Instruments Corporation. All rights reserved. March 2021 機械專業(yè)中英文文獻翻譯 8 Using UDP in LabVIEW Because UDP is not a connectionbased protocol such as TCP, you do not need to es
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