Move the slide pointer to change the wave displayed on the graph. This site uses cookies to offer you a better browsing experience. However, no data is being plotted on the DSReader graph because there is no data being published. You can manipulate the wave with a knob on the user interface, and as you manipulate that wave or the wave generated by the DSWriter, you are going to add the two waves together and display the result on a second graph. Right click on the toolbox and select Components. This site uses cookies to offer you a better browsing experience.
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The message also includes the URL of the requested data from the server. To modify the scale on the knob, right click on the knob, select Propertiesand change Minimum to 1 on the Numeric page.
Adjust the slide on DSWriter.
DataSocket Transfer Protocol (dstp) Overview
You must install Measurement Studio 2. DataSocket provides a unified API for these low-level communication protocols. The message also includes the URL identifying the data on the server. Add the following function to your code window. However, no data is being plotted on the DSReader graph because there is no data being published. The prefix is called the URL scheme. Imagine a lab with 30 student workstations, a server for datasockeg lab, and a computer that acquires measurements and performs analysis on the measured data.
DataSocket Transfer Protocol (dstp) Overview - National Instruments
When the DataSocket control is updated with new data, the graph plots it. The Measurement Studio DataSocket package includes three tools: You could embellish the student lab scenario by developing a DSWriter servr.
Publishers and subscribers for the measurement data must refer to the data item by the same URL. The professor can restart the acquisition or reboot the acquisition computer without having to reconnect all 30 student workstations. In other words, clients maintain a session during communication with the server. To develop the DataSocket client Web page, you create a DataSocket reader component with which users connect to the server, automatically read and display the data, and disconnect from the server.
Client-side buffering can be configured through URL options, while server-side buffering can be configured through the DataSocket Server Diagnostic dialog box in the server. To customize its appearance or behavior, modify the properties listed in the Visual Basic Properties window.
Rate this document Select a Rating 1 - Poor 2 dafasocket 4 5 - Excellent. Terminating the Session To terminate a connection, a client sends a request for disconnect to the server.
Double click on the knob and add the following event procedure. Double click the DataSocket control, and add the following code: Turn the knob to change the number of cycles in MySinWave. The event procedure skeleton includes the control name, the default event, and any parameters that are passed to the event procedure.
Building an Interactive Web Page with DataSocket
For example, you might need to perform a spectrum analysis. You also can insert additional ActiveX controls.
In this example, you create that component with ActiveX controls and Visual Basic code to manipulate those controls and save this component as an ActiveX control. After you make the.
Building an Interactive Web Page with DataSocket - National Instruments
A dstp URL indicates the name of the DataSocket server and the access path for a particular measurement data item. To transfer data to the server, a client sends a message whose header prompts the server to write the data encapsulated in the message as the new value for dtaasocket data.
You should replace the existing file. Place a CWKnob control on the form. Add a label to identify the Status display. This site uses cookies to offer you a better browsing experience. The DataSocket control will not be visible at runtime. Right click on the toolbox and select Components.
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