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Getting Started with DASYLabGetting Started with DASYLabNational Instruments Ireland Resources LimitedSeptember 2005 374212A-01 English-Language Support and DistributionAmericasCEC Capital Equipment6 Bedford FarmsBedford, NH 03110 USATel.: +1 603 472 1068Fax: +1 603 472 1069E-Mail: support@cec488.comwww.cec488.comWorldwide - Outside the AmericasmeasX GmbH & Co.KGTrompeterallee 11041189 Moenchengladbach GermanyTel.: +49 2166 9520-0Fax: +49 2166 9520-20E-Mail: info@measx.comwww.measx.com Worldwide Support and Distributionwww.dasylab.com© 2005 National Instruments Ireland Resources Limited. All Rights Reserved. Important InformationWarrantyDASYLab is warranted against defects in materials and workmanship for a period of 90 days from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the warranty period. This warranty includes parts and labor. The media on which you receive National Instruments software are warranted not to fail to execute programming instructions, due to defects in materials and workmanship, for a period of 90 days from date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace software media that do not execute programming instructions if National Instruments receives notice of such defects during the warranty period. National Instruments does not warrant that the operation of the software shall be uninterrupted or error free.A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside of the package before any equipment will be accepted for warranty work. National Instruments will pay the shipping costs of returning to the owner parts which are covered by warranty.National Instruments believes that the information in this document is accurate. The document has been carefully reviewed for technical accuracy. In the event that technical or typographical errors exist, National Instruments reserves the right to make changes to subsequent editions of this document without prior notice to holders of this edition. The reader should consult National Instruments if errors are suspected. In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it.EXCEPT AS SPECIFIED HEREIN, NATIONAL INSTRUMENTS MAKES NO WARRANTIES, EXPRESS OR IMPLIED, AND SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. CUSTOMER’S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER. NATIONAL INSTRUMENTS WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA, PROFITS, USE OF PRODUCTS, OR INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. This limitation of the liability of National Instruments will apply regardless of the form of action, whether in contract or tort, including negligence. Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control. The warranty provided herein does not cover damages, defects, malfunctions, or service failures caused by owner’s failure to follow the National Instruments installation, operation, or maintenance instructions; owner’s modification of the product; owner’s abuse, misuse, or negligent acts; and power failure or surges, fire, flood, accident, actions of third parties, or other events outside reasonable control.CopyrightUnder the copyright laws, this publication may not be reproduced or transmitted in any form, electronic or mechanical, including photocopying, recording, storing in an information retrieval system, or translating, in whole or in part, without the prior written consent of National Instruments Corporation.TrademarksNational Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation. Refer to the Terms of Use section onni.com/legal for more information about National Instruments trademarks.Other product and company names mentioned herein are trademarks or trade names of their respective companies.PatentsFor patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your CD, or ni.com/patents.WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS(1) NATIONAL INSTRUMENTS PRODUCTS ARE NOT DESIGNED WITH COMPONENTS AND TESTING FOR A LEVEL OF RELIABILITY SUITABLE FOR USE IN OR IN CONNECTION WITH SURGICAL IMPLANTS OR AS CRITICAL COMPONENTS IN ANY LIFE SUPPORT SYSTEMS WHOSE FAILURE TO PERFORM CAN REASONABLY BE EXPECTED TO CAUSE SIGNIFICANT INJURY TO A HUMAN.(2) IN ANY APPLICATION, INCLUDING THE ABOVE, RELIABILITY OF OPERATION OF THE SOFTWARE PRODUCTS CAN BE IMPAIRED BY ADVERSE FACTORS, INCLUDING BUT NOT LIMITED TO FLUCTUATIONS IN ELECTRICAL POWER SUPPLY, COMPUTER HARDWARE MALFUNCTIONS, COMPUTER OPERATING SYSTEM SOFTWARE FITNESS, FITNESS OF COMPILERS AND DEVELOPMENT SOFTWARE USED TO DEVELOP AN APPLICATION, INSTALLATION ERRORS, SOFTWARE AND HARDWARE COMPATIBILITY PROBLEMS, MALFUNCTIONS OR FAILURES OF ELECTRONIC MONITORING OR CONTROL DEVICES, TRANSIENT FAILURES OF ELECTRONIC SYSTEMS (HARDWARE AND/OR SOFTWARE), UNANTICIPATED USES OR MISUSES, OR ERRORS ON THE PART OF THE USER OR APPLICATIONS DESIGNER (ADVERSE FACTORS SUCH AS THESE ARE HEREAFTER COLLECTIVELY TERMED “SYSTEM FAILURES”). ANY APPLICATION WHERE A SYSTEM FAILURE WOULD CREATE A RISK OF HARM TO PROPERTY OR PERSONS (INCLUDING THE RISK OF BODILY INJURY AND DEATH) SHOULD NOT BE RELIANT SOLELY UPON ONE FORM OF ELECTRONIC SYSTEM DUE TO THE RISK OF SYSTEM FAILURE. TO AVOID DAMAGE, INJURY, OR DEATH, THE USER OR APPLICATION DESIGNER MUST TAKE REASONABLY PRUDENT STEPS TO PROTECT AGAINST SYSTEM FAILURES, INCLUDING BUT NOT LIMITED TO BACK-UP OR SHUT DOWN MECHANISMS. BECAUSE EACH END-USER SYSTEM IS CUSTOMIZED AND DIFFERS FROM NATIONAL INSTRUMENTS' TESTING PLATFORMS AND BECAUSE A USER OR APPLICATION DESIGNER MAY USE NATIONAL INSTRUMENTS PRODUCTS IN COMBINATION WITH OTHER PRODUCTS IN A MANNER NOT EVALUATED OR CONTEMPLATED BY NATIONAL INSTRUMENTS, THE USER OR APPLICATION DESIGNER IS ULTIMATELY RESPONSIBLE FOR VERIFYING AND VALIDATING THE SUITABILITY OF NATIONAL INSTRUMENTS PRODUCTS WHENEVER NATIONAL INSTRUMENTS PRODUCTS ARE INCORPORATED IN A SYSTEM OR APPLICATION, INCLUDING, WITHOUT LIMITATION, THE APPROPRIATE DESIGN, PROCESS AND SAFETY LEVEL OF SUCH SYSTEM OR APPLICATION. © National Instruments Ireland Resources Limited v Getting Started with DASYLabContentsAbout This ManualConventions .viiChapter 1Data Acquisition and Visualization with DASYLabDefining Experiments in the Worksheet Window .1-2Designing the Visualization in the Layout Window 1-4Using the Function Bar 1-6Chapter 2Creating Your First WorksheetAcquiring and Displaying Signals .2-1Extending the Displays 2-3Saving the Worksheet 2-6Chapter 3Creating a Complete Worksheet SolutionConfiguring the Data Acquisition Device .3-1Collecting and Scaling the Data .3-4Displaying the Data .3-6Storing the Data .3-8Connecting the Modules 3-9Documenting the Worksheet .3-11Configuring the Display Windows 3-13Designing a Layout for Visualization 3-16Appendix AModule GroupsInput/Output Module Group A-1Trigger Module Group .A-1Mathematics Module Group A-2Statistics Module Group A-2Signal Analysis Module Group A-2Control Module Group .A-3Display Module Group A-3Files Module Group .A-3 Getting Started with DASYLab vi www.dasylab.comData Reduction Module Group . A-4Network Module Group A-4Special Module Group . A-4Add-On Module Group . A-5Specific Hardware Modules A-5Appendix BTips and TricksCombining and Configuring Modules . B-1Block Size and Sampling Rate B-3Optimizing the Processing Speed B-3Trouble-Shooting . B-4 © National Instruments Ireland Resources Limited vii Getting Started with DASYLabAbout This ManualThis manual provides information about the operation and functions of the DASYLab Data Acquisition and Analysis software. Two exercises show you how to select function modules, how to link them in the worksheet work area and how to configure each module for your measurement. In the layout example, you will arrange the display modules to visualize the results of the data acquisition. Each exercise includes fig-ures that will assist you as you work through each step of the exercise.In addition to the examples included in this manual, you can start the DASYLab interactive Tutorial by selecting Help»Tutorial. The Tutorial steps you through DASYLab and demonstrates the features by creating worksheets of varying complexity. You can start the worksheets directly from the Tutorial. You can use the Tutorial worksheets as the basis for the construction of your own worksheet.ConventionsThe following conventions are used in this manual:<> Angle brackets denote a keyboard key that you must press, for example <Ctrl> for the Control key.» The » Symbol leads you through nested menu items and dialog box options to a final action. The sequence File»Page Setup»Options directs you to pull down the File menu, select the Page Setup item and select Options from the last dialog box.This icon denotes a tip, which alerts you to advisory information.This icon denotes a note, which alerts you to important informationbold Bold text denotes items that you must select or click in the software, such as menu items and dialog box options. Bold text also denotes parameter names.italic Italic text denotes variables, emphasis, a cross reference, or an introduction to a key concept. monospaceText in this font denotes text or characters that you should enter from the keyboard, sections of code, programming examples, and syntax examples. About This ManualGetting Started with DASYLab viii www.dasylab.comThis font is also used for the proper names of disk drives, paths, directories, programs, subprograms, subroutines, device names, functions, operations, variables, filenames, and extensions. © National Instruments Ireland Resources Limited 1-1 Getting Started with DASYLab1Data Acquisition and Visualization with DASYLabUse DASYLab to interactively create an acquisition, control, simulation or analysis task. Simply select a function module and place it on the worksheet. Configure your task by connecting the modules. DASYLab supports many data acquisition and control devices, as well as different interfaces that communicate with external instruments.DASYLab includes acquisition, control and analysis modules, including analog and digital inputs and outputs, mathematics, statistics, digital filters, FFT analysis, and switches. Logical operations, switches and sliders or the Sequence Generator provide exact, time-based waveforms for complex control signals. You can store the results of the data acquisition and analysis for off-line analysis by other programs.The Chart Recorder, Y/t Chart and the X/Y Chart will plot the data as curves. The List Display and Digital Meter display the data numerically. Freely scalable Analog Meter, Bar Graph and Status Lamp displays are useful for Process and Measurement controls.TipYou will find an overview of all available modules in Appendix A, Module Groups.Use the DASYLab VITool Layout Windows to design one or more custom screens. Display and Control modules can be inserted and combined with text and graphics. In addition to creating a custom screen, you can use the VITool to create reports to print and document the results of your measurement. The reports can be printed manually or automatically, based on user or data events during measurement.Save the worksheet, with the data workflow diagram, the display screens and the reports to a file, for use later (DASYLab Worksheet file, .DSB). You can easily create solutions for each measurement task on your PC, and load them when required. You can even configure the measurement to start at a later time after loading.Use the DLL Extension Toolkit to program your own DASYLab module. The toolkit contains a complete description of the DASYLab module API Chapter 1 Data Acquisition and Visualization with DASYLabGetting Started with DASYLab 1-2 wwww.dasylab.com(Applications Programming Interface) as well as example code. The examples are complete working programs for different module types. Experience with C Language and Microsoft Windows programming is required.Defining Experiments in the Worksheet WindowWhen you start DASYLab, the DASYLab Worksheet window appears with the menu, Function Bar, Module Bar, Browser and the Info Area. Click on the Function bar Worksheet button to open the Worksheet view from one of the other DASYLab views.Use the worksheet window to create your measurement worksheet. Select a function module from the Browser or Module bar and place it on the work area.The Modules symbolize the program functions, starting from the acquisition and generation of the data up to output and display of that data. A worksheet can contain up to 256 modules. Use the Black Box module to put an additional 256 modules in a “sub-worksheet”. You can have multiple Black Box modules, and each Black Box can contain Black Boxes. Open a Black Box by double-clicking on the module; close it by clicking on the Close Black Box button on the Function bar.Data channels connect the modules. Module outputs can be connected to module inputs. Your task determines how the modules will be connected.Figure 1-1 shows the DASYLab Worksheet Window with the work area, the Module Bar, Browser and the Info Area. 123doc.vn