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DASYLab - Measurement Computing

1. OQ 2 80 75 100 125 150 176 200 225 260 75 00 325 0 YA Chart 0 YA Chart 1 ms 7 Right click the Y t Chart display window workspace to change the display during the measurement a Select Display Window Colors and Lines from the context menu b Click Drawing area in the Display elements list c Click the Color button and select light yellow as new color for the drawing area d Click OK Figure 1 3 shows the colors and lines dialog box 1 4 dasylab com DASYLab Figure 1 3 Color and Line Display of a Display Window Colors and Lines X Display elements Selected color Background Lox Drawing area X unit Cancel Coordinate system Selected line Grid aan He Input 1 Line thickness Maximum 10 Line style Marker m e Click OK The drawing area of the Y t Chart display window changes to the new color 8 Click Stop on the function bar to stop the measurement Q Tip You also can press lt F5 gt to start the measurement lt Ctrl F6 gt to pause the measurement and lt Ctrl F5 gt to stop the measurement Calculating Online Complete the following steps to run calculations with the Formula Interpreter during the measurement 1 Click the Plus sign next to the module group Mathematics in the browser a Select the Formula Interpreter module and drag and drop the module into the worksheet b Dou
2. cccesssssesecsececsecscesceseeseeeeeeeeseeseceeceeceeeeeeeees The Data Reduction Modules Group The Network Modules Group The Special Modules Group sf The Add On Modules Group cccccceccescesceseesecsecsecsecseeaceneeaeeeeeeeeeseeeeeeees Appendix B Tips and Tricks Troubleshooting ccecececcesceseeseeseeseesecsecsecaeeseeseeseeeeeeeeeeeeeceseeeceeeeaeeeees B 1 Index National Instruments Ireland Resources Limited ix About This Manual Use this manual to learn how to run measurements and how to display measurement data with DASYLab Chapter 1 explains how to select a module for each function You connect the modules in the worksheet and configure each module for your measurement Each exercise contains diagrams that illustrate the steps involved Chapter 2 explains how worksheets are organized and how to configure modules Use black boxes to create sub worksheets to integrate partial solutions and to increase the number of possible modules in the worksheet Chapter 3 explains how to use the display window and the input instruments In the layout you can create display screens and measurement records Chapter 4 explains standard drivers and DLL drivers of the installed measurement hardware Use DASYLab supported interfaces to access external devices and programs Chapter 5 explains actions that execute module related functions event driven and variables and strings that transport information
3. 9 Stop the measurement after some time National Instruments Ireland Resources Limited 1 7 Chapter 1 Getting Started with DASYLab Inserting Digital Instruments Complete the following steps to include a digital instrument in the worksheet 1 amp Nn WN 1 8 Click the Plus sign next to the module group Display in the browser a Select the Digital Meter module and drag and drop the module into the worksheet b Double click the Digital Meter module to open the dialog box c Click the Plus button next to the channel bar twice to create two additional inputs d Click OK DASYLab creates three inputs in the Digital Meter module Double click the Y t Chart module to open the dialog box a Click the Copy inputs check box b Click OK DASYLab creates three outputs in the Y t Chart module which output the incoming data unchanged Drag the Digital Meter module to the Y t Chart module until the chart outputs touch the digital inputs When you release the mouse button DASY Lab automatically connects the two modules with three data channels Click Restore All Windows on the function bar to open both display windows Arrange the two display windows as shown in figure 1 6 Start a measurement dasylab com DASYLab Figure 1 6 Displaying Numeric Data in the Digital Meter D DASYLab Worksheet ee x File Edit Modules Measurement View Tools Options Window Help gt na Ba Jyo
4. Chapter 6 explains the Script module with which you create a module with the functions and settings you need for your task Chapter 7 explains the characteristic values of data flow in DASYLab Sampling rate and block size The appendix introduces the module groups and provides tips and tricks for creating worksheets Conventions The following conventions are used in this manual lt gt Angle brackets indicate a key you press to perform a function for example lt Ctrl gt for the control key The symbol leads you through nested menu items and dialog box options to a goal File Page Format instructs you to open the menu item File and to select Page Format National Instruments Ireland Resources Limited xi About This Manual Q This icon denotes a tip which alerts you to advisory information a This icon denotes a note which alerts you to important information bold Bold text denotes items that you must select or click in the software such as menu items and dialog box options italic Italic text denotes emphasis new terms a cross reference or an introduction to a key concept mono You enter text or letters in this type with the keyboard for example space formulas or code extracts This font is also used for the names of drives paths folders programs sub programs sub routines device names functions operations commands variables control elements events methods filenames filename ext
5. 5 OPC interface 4 5 P Polar plot 3 7 Precision 7 3 Predefined settings 6 1 R Response time 7 1 RS232 interface 4 5 S Sampling rate 7 1 Script 6 2 Script functions 6 3 Script module 6 1 Channel properties 6 2 Default settings 6 1 Export 6 4 Programming 6 2 Script package 6 4 Sequence control 5 3 Significant points 7 3 Slider 3 10 Status display 3 9 Sub worksheet 2 6 2 7 Switch 3 9 Synchronous actions 5 2 System clock 7 2 T TCP IP interface 4 4 W Waterfall diagram 3 5 Worksheet 1 1 2 1 Create 1 2 Modules 2 1 Tips on how to create B 1 Write data 1 9 X X Y chart 3 7 Y Y t chart 3 5 Color sonogram 3 6 Waterfall diagram 3 5 National Instruments Ireland Resources Limited 1 3
6. Bottom Row Displays the Current Data Block 3 6 dasylab com DASYLab X Y Chart Use the x y chart to display several data channel pairs as xy curves or as vectors in 2D axis systems To display an oscilloscope with the x y chart enable the setting Circular grid Select a high number of data blocks after which DASYLab refreshes the display so that DASYLab plots a curve and not the last data pair as a point Every data channel of a channel pair and also the data channel pairs of a module must always contain the same type of data You can display several data channel pairs in one axis system or in separate axis systems Polar Plot Use the polar plot to display a data channel pair in one polar axis system If you select the X Y coordinates display DASYLab plots an xy curve if you select Draw source vector DASYLab plots the vector of the last data pair The two data channels must always contain the same type of data Label the curve or the top of the vector in regular intervals with the values of the third data channel to be connected Figure 3 4 displays the sampled surface of a shaft as an xy coordinate Figure 3 4 Display of the Surface of a Shaft in the Polar Plot P 270 National Instruments Ireland Resources Limited 3 7 Chapter 3 Visualizing Measurements Digital Meter Use the digital meter to display the values of the connected data channels numerically By default the digital meter display
7. Documents and Settings All Users Documents DASYLab lt Version Number gt lt Language gt Blackbox To insert a black box into a worksheet select MyBlackbox on the Black Box tab of the browser and drag and drop the black box into the worksheet You can create sub folders on the Black Box tab with the context menu in order to sort your black boxes thematically The DAP box is a special black box which offers an individual Ea user interface to the processing functions of the DAP driver If the DAP hardware driver from Microstar Laboratories is installed on your computer you can select Inputs Outputs DAP DAP Box New on the Modules tab of the browser and drag and drop a DAP box into the worksheet You can use one DAP Box in the worksheet for each installed DAP board In DAP boxes you create a worksheet solely with DAP modules The DAP board and not the computer processes the functions and data used in the DAP box Therefore you cannot use any other DASYLab modules in a DAP Box You establish a connection between the DAP board and the computer that is between the DAP Box and the DASYLab worksheet via DAP export import modules You cannot use a DAP box or a black box to nest DAP boxes Unlike a black box you only can save a DAP box with the worksheet and cannot export it 2 8 dasylab com Visualizing Measurements DASYLab offers various modules for visualizing acquired and processed measurement data The diagram the chart reco
8. Ireland Resources Limited 5 1 Chapter 5 Controlling Measurements Controlling with Actions The Action module executes event related module specific functions such as resetting mathematical calculations changing the display screen or stopping the measurement Like a trigger module the action module monitors whether the connected input channels meet the specified conditions However when a condition is met the action module does not output a TTL signal which influences the data flow in the worksheet but activates a module specific function which runs in the background Therefore the action module has only inputs but no outputs unlike trigger modules For example you can use an action to print the chart recorder display of a temperature measurement when the temperature exceeds a certain value To do so select Special Action on the Modules tab of the browser and connect the input of the Action module with the monitored data channel Temperature Open the dialog box to specify the action First select the receiver Recorder then the module specific action Print and finally the trigger event Threshold value exceeded Enter 50 as the Threshold value When you start the measurement DASYLab prints the current recorder display as soon as the temperature exceeds 50 C You can monitor up to 16 different data channels with one action module or one data channel for which you can specify up to 16 different actions You can select mod
9. REAR X S agd a te Modules Black Box Navigator E Modules 5 Inputs Outputs E Trigger Functions a E Mathematics 5 Statistics E Signal Analysis E Control S E Display Yit Chart XIV Chart Chart Recorder E Digital Meoo 0 E Yt Chartoo Axes Display Survey Text Help Qa ss tahe Ge SEG gA ew 2 5 5 0 a I r I X 0 25 50 75 100 150 200 250 300 350 Ya Chart 0 YA Chart 1 YA Chart 2 ms 7 Stop the measurement after some time Saving Measurement Data Complete the following steps to save the measurement data in a file 1 Click the Plus sign next to the module group Files in the browser a Select the Write Data module and drag and drop the module into the worksheet b Double click the Write Data module to open the dialog box D c Click the Plus button next to the channel bar twice to create two additional inputs d Click File and enter MyData ddf as the file name Click Save to close the file dialog box Click OK DASYLab creates three inputs in the Write Data module National Instruments Ireland Resources Limited 1 9 Chapter 1 Getting Started with DASYLab 2 Double click the Digital Meter module to open the dialog box a Click the C
10. The sub folder IEEE 488 contains the modules TEEE488 Input and TEEE488 Output to exchange data with external measurement devices connected to IEEE boards The sub folder IVI contains the modules IVI Counter IVI DCPower IVI Digital Multimeter IVI Switch and IVI Scope which are based on the respective class specifications of the IVI foundation The Trigger Functions Modules Group The trigger functions modules group contains various trigger modules to control the data flow in the worksheet with conditions When the condition is met trigger modules output a TTL signal The Pre Post Trigger module continuously monitors whether data channels exceed limit values whereas the Start Stop Trigger module checks when data channels exceed a limit value the first time The Combi Trigger module continuously monitors the start condition and then the stop condition of data channels The Sample Trigger module continuously monitors the duration of trigger events whereas the Trigger on Demand module monitors the increase or decrease of successive measurement values The Relay module outputs the connected data channels when a trigger input or an action meets the condition Unlike the other trigger modules the module does not output TTL signals The Mathematics Modules Group The mathematics modules group contains modules to process data channels mathematically Use the Formula Interpreter to define your own formulas to calculate data channe
11. a hand holding a plug a Drag this plug to Input 0 of the Formula Interpreter b When the color of the Formula Interpreter input terminal changes color click Input 0 to connect the top data channel to the Formula Interpreter 1 6 dasylab com DASYLab 5 Repeat these steps to connect the bottom data channel to Input 1 of the Formula Interpreter 6 Double click the Y t Chart module to open the dialog box D a Click the Plus button next to the channel bar to create a third input b Click OK DASYLab adds another input to the Y t Chart 7 Click Output 0 of the Formula Interpreter and connect this output to Input 2 of the Y t Chart Q Tip To delete a data channel right click the data channel twice with the right mouse button not a double click 8 Start a measurement p The Y t Chart display window now shows three curves the sine signal the rectangular signal and the calculated signal Figure 1 5 Displaying Generated and Calculated Signals D DASYLab Worksheet Woe Fie Edt Modules Measurement View Tools Options Window Help gt na BH Jya RETA XO 9 aJs Modules Black Box Navigator I E Modules 5 Inputs Outputs aE Trigger Functions 5 E Mathematics ieneratoro0 IYn Charo Woes Axes Display Survey Text Help ja SSL A lA OES 75 D0 1 25 SU 75 EEA 7S a S25 S50 YA Chan 0 YA Chart 1 YA Chart 2 ms
12. and outputs are also independent If you need more than 16 inputs and outputs in a black box add the Multiplexer Demultiplexer module Use the multiplexer to combine data from different data channels into one data channel and the demultiplexer to distribute data from one data channel onto several data channels To close a black box click Close Black Box on the function bar You return to either the main worksheet or the higher ranking black box Black boxes divide complex worksheets into functional sub worksheets which you can export and import as partial solutions into other worksheets Before you can export a black box you must open the black box and open the properties dialog box via Edit Black Box Black Box Properties Enter a name and a unique three figure code in the ID tag box to identify the module on the module bar To save the open black box open the Black Box tab of the browser The Black Box tab displays all the black boxes stored in the default folder in a tree view Right click this tree structure and select Save Open Black Box from the context menu Enter a filename such as MyBlackbox DASYLab saves all black boxes with the filename extension dbb in the default folder for black boxes under Windows 8 Windows 7 Windows Vista C User Public Documents DASYLab lt Version Number National Instruments Ireland Resources Limited 2 7 Chapter 2 Defining Measurements lt Language gt Blackbox and Windows XP C
13. blockwise e You have specified a very high value for No of blocks in the modules Histogram or Statistical Values The module needs a long time to output the data e Ifthe hardware is incorrectly configured data may not displayed because the hardware is not acquiring data Check the hardware settings especially the board type the base address the IRQ channel and possibly the DMA channel National Instruments Ireland Resources Limited B 3 Index A Action 5 2 Asynchronous 5 3 Print layout 3 12 Synchronous 5 2 Analog meter 3 8 B Bar graph 3 8 Black box 2 6 Creating inputs and outputs 2 7 DAP boxes 2 8 Export 2 7 Block size 7 1 Browser 2 1 Black box 2 8 Modules 2 4 Navigator 2 4 C Channel bar 1 2 2 5 Channel properties 6 2 Chart recorder 3 4 Event search 3 5 Coded switch 3 10 Color sonogram 3 6 Configurator 4 1 Connection 2 3 Disconnect 2 3 Nodes 2 2 2 3 Control input 5 1 Copying settings 2 6 D Data channel configuration 2 5 Data flow 2 2 7 1 Measurement setup 7 2 Processing speed 7 3 Significant digits 7 3 System clock 7 2 Data source Input Output 2 2 DDE interface 4 4 Default driver 4 3 Diagram 3 3 Digital meter 1 8 3 8 Display 1 1 1 8 3 1 Analog meter 3 8 Bar graph 3 8 Chart recorder 3 4 Create 1 3 Diagram 3 3 Digital meter 3 8 Layout 3 10 List 3 8 Polar plot 3 7 Status display 3 9 X Y chart 3 7 Y t chart 3 5 Display win
14. browser a Click the Plus sign next to the Control module group b Select the Generator module and drag and drop the module into the worksheet Specify the generator type in the dialog box that opens Figure 1 1 Generator Selection Dialog Box Generator Select module type O Read global variables Without modulation Modulation c Click OK to confirm the default setting DASYLab inserts the generator into the worksheet Use the generator module to create a hardware independent worksheet that you can use on every computer with a DASYLab installation You replace the Generator module later with the module of the installed hardware for example the analog input of the NI DAQmx driver 2 Double click the Generator module to open the dialog box The first channel outputs a rectangular waveform signal D a Click the Plus button next to the channel bar to activate a second signal b Ifyou click the button of channel 1 the channel outputs a sine 1 2 waveform signal c Click OK DASYLab adds a second output to the generator dasylab com DASYLab 3 Click the Plus sign next to the module group Display in the browser a Select the Y t Chart module and drag and drop the module into the worksheet b Double click the Y t Chart module to open the dialog box D c Click the Plus button next to the channel bar to activate a second input d Click OK DASYLab adds another input to the Y
15. exceptions the hardware drivers for all DASY Lab supported hardware are DLL drivers After installation the modules for National Instruments hardware are on the Modules tab of the browser under Inputs Outputs NI DAQmx Open Measurement Hardware Setup NI DAQmx to configure the hardware If you want to configure individual tasks open Measurement Measurement Setup NI DAQmx Measurement Setup The NI DAQmx driver accesses a configuration program from the hardware manufacturer Before you can install the NI DAQmx driver you must install the Measurement Automation Explorer MAX The driver software is supplied with the measurement hardware Default Driver Default drivers use the DASYLab default driver interface because these drivers do not have their own interface If you install several default drivers you only can use one default driver at a time For example if you want to measure with the sound card select Measurement Driver Selection Sound Card Figure 4 2 Then you must end and restart DASYLab so that DASY Lab stores the driver settings Figure 4 2 Default Driver for Sound Cards Select Driver Installed drivers OK DEMO Sound board Select the driver that DASYLab is to load when the program starts next Everywhere in DASYLab where you can select a Driver or Hardware you now find the settings and the modules of the sound card The sound card modules are on the Modules tab of
16. from the worksheet and write this data into a file only need inputs Modules that process data need inputs and outputs After you have specified the predefined settings DASYLab creates a script module DASYLab saves the predefined settings as binary data in the module which means you cannot view or change the predefined settings At the same time the script which you want to create must be based on these National Instruments Ireland Resources Limited 6 1 Chapter 6 Programming Your Own Modules predefined settings For example you cannot load a script for an output module into an input module later on In the script module you now specify the type of data to be processed Double click the module and select Channel Properties In the channel properties dialog box you specify which data the script module accepts at its inputs and which data the module outputs If the module processes only continuous time data you do not need to make any settings If the module processes spectral data or histogram data or if the data has gaps or data blocks that differ in length you must change the settings The channel properties impact all data channels of the module Like all DASYLab modules the script module can contain up to 16 data channels which you can specify in the script together with the block size and the sampling rate of the data DASYLab saves the channel properties as binary data in the script module However you can view and cha
17. have nodes you must first move the modules individually and then move the nodes Avoid long connections Use the setting Copy inputs in the display and other data sink modules to transfer data unchanged to subsequent modules Activate the grid display in Options Global Setup to make it easier to arrange the modules The grid interval determines the minimum distance between neighboring modules and should be greater than 16 points You can change the background color and the grid color in the context menu of the worksheet 2 2 dasylab com DASYLab If you want to delete a module select the module and press lt Del gt If you want to copy a selected module from the worksheet including the settings click Copy on the function bar and then Paste To replace a module with a different module such as a generator with a hardware input right click the Generator and select Replace Module from the context menu DASYLab lists all available data sources that you can use to replace the generator For example select Inputs Outputs NI DAQmx Analog Input for an NI DAQmx Analog Input The module connections and the module name remain the same after the replacement You can connect modules semi automatically or manually If you want to connect several data channels simultaneously use the semi automatic connection method To do so move the module inputs to the outputs of the neighbor module on the left DASYLab connects the data channel terminals
18. most modules you cannot delete the first channel but in some modules you cannot delete the first two or three channels Figure 2 2 Generator Dialog Box Displays Three Data Channels on the Channel Bar X Generator without Modulation Module name Generator00 Description eh whl a E SEY ale oor TTT TTT TTT ry D Generator 1 E _ Parameters Curve form Frequency in Hz 10 0000 Sine O Triangular Amplitude 4 0000 O aia O Sawtooth Offset 0 0000 O Pulse Phase shift Deg 0 0000 O Constant Duty cycle M Output in real time O Noise For example to create seven data channels press lt Ctrl gt while double clicking channel 6 DASYLab creates seven channels In order to disable data channels down to the third data channel right double click channel 3 while pressing lt Ctrl gt DASYLab disables all channels above channel 2 To configure a channel click the orange plug symbol on the channel bar The selected channel now denotes a green plug symbol Use the settings underneath the channel bar to configure this channel The channel National Instruments Ireland Resources Limited 2 5 Chapter 2 Defining Measurements configuration comprises the channel name the unit and all function specific settings Channel 1 of the generator in Figure 2 2 generates a sine curve with an amplitude of 4 volts and a frequency of 10 hertz If you want to configure several channels in one module in the same w
19. outputs values or character strings which the module reads from strings and variable The modules for these interfaces are on the Modules tab of the browser under Inputs Outputs RS232 Use the RS232 monitor to configure an external device You can send strings and read in measurement values to see immediately whether the data contains control characters The IEEE 488 Interface DASYLab receives data from hardware connected to IEEE boards via the IEEE 488 interface or DASYLab outputs data via this hardware The modules for these interfaces are on the Modules tab of the browser under Inputs Outputs IEEE 488 You can operate up to 15 measurement devices on one IEEE board If you output data to several devices you must insert a separate IEEE Output module for each measurement device and in the worksheet each device must use a different device number The IVI Interface DASYLab receives data from hardware devices which support the IVI interface Interchangeable Virtual Instrument The modules IVI Counter IVI DCPower IVI Digital Multimeter IVI Switch and IVI Scope are on the Modules tab of the browser under Inputs Outputs IVI 4 6 dasylab com Controlling Measurements The data flow and the sequence of the modules in the worksheet determine the measurement process You use triggers input instruments controllers and actions to control the measurement You use actions to execute module specific functions when an event occurs DA
20. preserve DASYLab resources if you use the Separate module To do so insert the Separate module which only lets every hundredth data block pass between the modules Analog Input and FFT DASYLab calculates an FFT for every hundredth data block which includes high frequencies due to the high sampling rate If the measurement does not require an online display you can first save the data in a file and later read and evaluate the data off line Significant Digits The accuracy with which DASYLab process data depends on the transferred data type The modules usually work with the 8 byte double data type whereas the data is transferred in the worksheet over connecting cables with just 4 byte float The accuracy of the float data type is altogether 6 places This means that measurements with results in the value range of 0 to 4000 are only correct up to 2 decimal places All subsequent decimal places are only an approximation National Instruments Ireland Resources Limited 7 3 The Module Groups Twelve module groups with related modules contain the DASYLab functions The appendix provides an overview of the available modules and their functions The installed DASYLab license determines which modules are available Modules that are not part of your license are dimmed in the browser Refer to your DASYLab vendor to extend your DASYLab license The Input Output Modules Group The input output modules group contains the hardware modu
21. t Chart If you use display modules such as the Y t Chart module DASYLab creates an additional display window which appears minimized at the bottom of the screen You must connect the modules with data channels to let the data flow 4 Todo so click and hold the Y t Chart module and drag the display module to the Generator module until the chart inputs touch the generator outputs When you release the mouse button DASYLab automatically connects the modules 5 Click Start on the function bar to start a measurement gt If you start a measurement and you want to see the display you must open the display window 6 Click Restore All Windows on the function bar The Y t Chart display window opens and you can view the signals that the Generator module generates similar to Figure 1 2 National Instruments Ireland Resources Limited 1 3 Chapter 1 Getting Started with DASYLab Figure 1 2 Displaying Generated Signals fo DASYLab Worksheet Woe File Edit Modules Measurement View Tools Options Window Help Pues DSG JANA BREUER XOA S aJJ Modules Black Box Navigator E Modules aE Inputs Outputs S E Trigger Functions Generatori E E Mathematics a E Statistics S E Signal Analysis aE Control Display E Yit Chart E X Y Chart a5 Chart Recorder ol Vit Chartoo Woes Axes Display Survey Text Help Oo fPea Lt Ce REL A eA
22. that are exactly opposite each other You also can use this method if the number of inputs of the module receiving data is not the same as the number of outputs of the modules providing data or if you do not want to connect all inputs You can connect other modules to the remaining free connections Use the manual connection method if you want to branch a data a channel To do so click a data channel The cursor changes its H appearance to a hand with a plug symbol Move this plug for example to the input of a scaling module to convert the acquired raw data If you connect modules manually the direction of the new data channel is important You connect a module input with another module output or you branch a data channel to a module output or you connect a module input with a data channel Every data channel can have up to 15 nodes Ifyou clicked the input or the output of a module without wanting to establish a connection you can terminate the action by clicking anywhere in the worksheet If you want to delete a data channel right click the data channel twice With the first click the data channel changes its color and with the second click DASY Lab deletes the data channel To delete all the module data channels right click the module and select Delete Input Connections or Delete Output Connections DASYLab does not permit open inputs and in DAP boxes DASYLab does not permit open outputs or open inputs The Re
23. the browser under Inputs Outputs Driver Open Measurement Hardware Setup Driver to configure the hardware Open Measurement Measurement Setup Driver to configure National Instruments Ireland Resources Limited 4 3 Chapter 4 Hardware Setup the measurement To open the help for the default driver open Help Hardware Interfaces In DASYLab you also can request data over the DDE TCP IP OPC ODBC RS232 and IEEE interface from other programs or external devices Using Online DDE You can exchange data with other programs that run parallel on the same computer via the DDE interface Dynamic Data Exchange The modules for these interfaces are on the Modules tab of the browser under Inputs Outputs DDE DASYLab can request data as a DDE client or as a DDE server can provide data and execute commands If DASYLab acts as a DDE server you must enter the address in the module e Application Name of the DDE server or of the executing program Enter DASYLAB e Topic Data area the client accesses Enter SetData e Name Module name of the DDE input module To establish the communication the server must start first and then the client DASYLab transfers the data in ASCII format Exchanging Data over TCP IP TCP IP stands for Transmission Control Protocol Internet Protocol and is the basis for the internet and also the intranet The data source server can be a DASYLab installation that provides data to a higher r
24. with a level and the level duration For example DASYLab searches for an event with a level that exceeds 5 volt for at least 10 seconds If the event search is successful a green diode lights up and displays the value DASYLab zooms the curve section with the peaks in the display window If you search during the measurement DASYLab freezes the display Click the buttons in the dialog box to search for and to display the next peaks As soon as you close the dialog box for the event search the chart recorder displays the curve with the specified sampling rate however still zoomed Click Zoom In to restore the original display Y t Chart Use the Y t chart to display fast data acquired in kilohertz as curves over time in 2D axis systems Unlike the chart recorder the Y t chart plots the curve from left to right Like the chart recorder the Y t chart can refresh the display continuously or after a specified number of data blocks Then the curves can be viewed unchanged for some time on the screen In the wiper display the Y t chart plots the curves continuously with a vertical line and overwrites the old curves when the wiper has reached the end of the axis system The wiper mode provides an overview over the development of the measurement values You also can use the Y t chart to display data channels as a 3D waterfall display or as a 3D color sonogram You enable and configure the 3D display in the menu of the display window If you enable th
25. 01 s DASYLab must process 100 modules in 1 millisecond This leaves each module 10 microseconds to process its data DASYLab aborts the process because the time is too short National Instruments Ireland Resources Limited 7 1 Chapter 7 Configuring the Data Flow is the more often the worksheet gets updated Use a ratio of 0 1 stol s Note The smaller the ratio between block size and sampling rate Ai Click Measurement Setup on the function bar to specify the sampling rate and the block size You can specify the sampling rate and the block size in the measurement settings dialog box or you only specify the sampling rate and DASYLab specifies the block size as shown in Figure 7 1 If you do not have hardware installed DASYLab uses the computer clock as the timer If you specify a default driver under Measurement Select Driver you can use the hardware clock The settings Driver buffer Analog output and Digital output also refer to the default driver Figure 7 1 Measurement Settings of the Default Driver Measurement Setup General settings Sampling rate 10 0000 Unit Hz iv il g g AN xj Specify automaticaly Cancel Block size 4 Synchronization Computer clock Help Driver settings Driver buffer Sampling mode Blocks per series Waiting time sk Analog output Output mode Output buffer Output rate 10 0000 Output start Digital output Output mode Output buffe
26. 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 Contents About This Manual Conventi OMS nna eniai EE AEA E E AER xi Related Documentation cccccsecsssessecsecescecseceeceesecseeeecseceseecseeeeeeeneens xii Chapter 1 Getting Started with DASYLab Creating a Simple Worksheet s esesesseesssssesesesssesereerssseteesssererrensrereenes 1 2 Calculating Online eee eei eeraa aa E a a E aei Inserting Digital Instruments Saving Measurement Data Saving Worksheets 0 cccccceccescesceseeseeseesececescesceseeeseeseeseeeeeeeesceeeeeeeeteees Chapter 2 Defining Measurements Creatine Worksheets umepona aaa Pea Pa E KA Eaa Inserting and Connecting Modules Using the Browser and the Module Bars Configuring Modulles ccecceccecessesseecescseceecesescescensecsecsecseeseeeeeeeeeeeeees Creating Partial Solutions in Black Boxes ccceeesseeeeseeeeeeeeeseeseeeeeees Cha
27. DASY Lab Data Acquisition System Laboratory Data Acquisition Controlling and Monitoring June 2013 lt 7 NATIONAL 374212E 01 N INSTRUMENTS English Language Support and Distribution Americas Measurement Computing Corporation 10 Commerce Way Norton MA 02766 USA Tel 1 508 946 5100 Fax 1 508 946 9500 E Mail info mccdaq com www mccdaq com Worldwide Outside the Americas measX GmbH amp Co KG Trompeterallee 110 41189 Moenchengladbach Germany Tel 49 2166 9520 0 Fax 49 2166 9520 20 E Mail info measx com www measx com Worldwide Support and Distribution www dasylab com 2005 2013 National Instruments Ireland Resources Limited All Rights Reserved Important Information Warranty 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 equ
28. Lab the dependencies between the settings for example in order to first select the Color and then enable the color selection In DIgOK you transfer the values the user entered into the module to the variables when the user clicks OK In DlgCancel you reset the module initializations if the user clicks Cancel e SetupFifo This module function specifies the channel properties of the data blocks In SetupFifo you check whether the module can process the incoming data and transfer the properties of the data to be output to the subsequent modules If the module has no inputs the output channels receive the default values If the module has no inputs DASYLab does not call the SetupFifo e ProcessData ProcessValue These module functions process the data DASYLab calls the main function ProcessData regularly during the measurement in order to read or process data from a measurement hardware or to write the data into a file or to output data to the measurement hardware ProcessData can call ProcessValue in order to process single values Start Stop These module functions refer to the measurement In Start you define the measurement preparation and in Stop the measurement feedback e Load Save These module functions specify the loading and saving of the module in the worksheet In Load you prepare the module for the measurement In Save you prepare the module for the storage e Create Delete These module functions sp
29. MyScreen To input the numbers use the numbers at the top of your keyboard because DASYLab distinguishes these from the number pad To delete the current arrangement select View Delete Current Window Arrangement The display windows of the chart recorder the Y t chart the x y chart the polar plot and the list have a menu bar and a function bar in order to change the display during a measurement You can display all connected data channels in one axis system or each data channel in a separate axis system and you can change the axis scaling You can zoom scroll and measure areas in the display and you can freeze the display and copy it to the clipboard and print it If you connect several data channels to these display instruments which display measurement data as curves the data channels must provide data of the same type You only can display continuous triggered spectral or histogram data in a display window Triggered data has gaps between the consecutive data blocks Spectral data are results for example of an FFT and histogram data is the result of a classification Use several modules to display different data in a worksheet The chart recorder and the diagram are 3 2 dasylab com DASYLab exceptions because they can process continuous data and triggered data together in one module You configure input instruments diagrams analog and digital meters status displays and bar displays in the module dialog box For exam
30. NED 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
31. SYLab executes these actions in the background without data channels unlike other control modules During a measurement you can read in process and output characteristic values and text from variables and strings A sequence control is a sequence of worksheets that you link via actions You use variables and strings to transfer results from one worksheet to the next worksheet Triggering over Control Inputs Relay Some modules have a control input with which you can trigger A i o the module or control a function in the module The control input i a is always at the first position in the connection bar of a module and displays an X with a yellow background In the Relay the signal at the control input determines the output of the data at the inputs As long as there is a TTL High signal the relay outputs the data The value 0 corresponds to TTL Low and the value 5 corresponds to TTL High The threshold between TTL Low and TTL High is 1 5 which means that the relay does not output data as long as the value at the control input is smaller than 1 5 The Differentiation Integration module does not expect a TTL signal at the control input but evaluates the data signal You can specify different conditions for starting and ending mathematical calculations in this module Other modules such as Switch Signal Router and Select Values use the signal at the control input as an index to specify the input or the output National Instruments
32. Saving Worksheets Complete the following steps to save the worksheet and all the settings Click Save on the function bar le 2 Enter MyWorksheet as the filename 3 Click Save to close the file dialog box DASYLab saves the worksheet with the name MyWorksheet dsb in the DASYLab default folder which you specify under Options Default Folders DASYLab automatically adds the filename extension dsb The DASYLab window title bar now shows the new file name National Instruments Ireland Resources Limited 1 11 Defining Measurements Use a worksheet to describe measurement control and display tasks Select a module for each function and connect the modules according to the task Double click a module to configure the module DASYLab transports data in blocks from module to module DASYLab does not output a new data block until the current data block is completely filled with data The data flow in the worksheet goes from left to right Creating Worksheets a When you start DASYLab the DASYLab worksheet window opens as a shown in Figure 2 1 You drag modules from the browser drop the modules in the workspace and connect the modules according to the task You open measurement settings and start the measurement from the function bar During the measurement the info block displays the data flow of the data channel you click and the state of the internal buffer Figure 2 1 The Worksheet Window with Browser and Info B
33. The Statistics Modules Group The statistics modules group contains modules for the statistical evaluation of data channels The Statistical Values module calculates characteristic values for each data block such as the standard deviation the variance the mean value the minimum value and the maximum value To recognize and to output extreme values in data blocks use the Minimum Maximum module which unlike the Statistical Values module can determine several extreme values in one data block The Regression module calculates polynomials for approximation curves for the incoming data The Counter module counts data and events such as extreme values or level crossings and rising or falling edges The Sort Channels module sorts values in data channels in ascending or descending order The Select Values module filters out single values based on their position in the data block National Instruments Ireland Resources Limited A 3 Appendix A The Module Groups The Check Reference Curve checks whether data channels lie within a tolerance range The Pulse Analysis module evaluates pulse width modulated signals statistically The Histogram Classification module calculates the single frequencies or cumulative frequencies of the measurement values within specified classes The Rainflow Classification module runs classifications with one parameter or two parameters Use the Two Channel Classification module for two dimensional counting pr
34. ad Variable module ensures that the worksheet always meets this requirement before the measurement National Instruments Ireland Resources Limited 2 3 Chapter 2 Defining Measurements starts For example if you have a module with the same number of inputs and outputs and you do not want to use one of the inputs in the worksheet you can read the data for this input from a variable Using the Browser and the Module Bars The Modules tab on the browser on the left side of the screen provides all modules that you installed with DASYLab and the selected drivers The modules are arranged thematically in a tree structure for example inputs and outputs with the hardware and interface modules trigger functions mathematics and display instruments The Navigator tab of the browser lists all the modules that the worksheet contains The navigator lists the modules in the order in which you inserted the modules into the worksheet In order to find and to select a module in a complex worksheet select the module on the Navigator tab and select Go to Module from the context menu DASYLab selects the module and displays it in the center of the worksheet To configure a module select Open Dialog Box from the context menu If you select View Module Bar you can display a module bar with the most frequently used modules DASYLab displays the module bar on the left side of the screen Double click the module symbol to insert the module automatica
35. alog Input on the Modules tab of the browser and drag and drop the module into the worksheet Select Display Chart Recorder and drag and drop the module to the right of the Analog Input To connect the two modules drag the Chart Recorder against the Analog Input until the chart recorder inputs touch the outputs of the analog input When you release the mouse button DASYLab automatically connects the modules Click Start on the function bar and double click the title bar at the bottom of the screen to open the chart recorder If you want to color and label function sections of the worksheet you can insert documentation frames into the worksheet Documentation frames are permanently visible in the background of the worksheet They do not influence the worksheet behavior Right click the workspace and select Create Documentation Frame from the context menu The cursor changes its appearance to a cross with a sheet of paper Drag open a frame in the workspace Double click the documentation frame to enter comments and to change the background color If you want to create another documentation frame select Create Documentation Frame from the context menu To finish editing the documentation frame disable Edit Documentation Frame in the context menu Inserting and Connecting Modules You can move one or several selected modules in the worksheet in order to place each module at an appropriate position in the worksheet If the connecting data channels
36. an only be used with black boxes Use the Action module to control event driven procedures in the worksheet modules and to create sequence controls Use the Message module to visualize and to document the defined actions on your computer You send messages with the E Mail module The Time Base module generates time data or extracts time data from data channels and the Signal Adaptation module synchronizes data channels with different sampling rates to a common time base The Script module offers the basis for creating a module with user defined functions You program the functions and properties in Python and register the exported script packages in DASYLab The Add On Modules Group The add on modules group contains modules that were created with the DASYLab Extension Toolkit You can purchase the add on modules and install the respective DLLs Dynamic Link Library or you can create your own modules with the Extension Toolkit in order to extend the DASYLab functionality The Convolution module weights a time function with other time functions for example to filter the signal The Weighting module evaluates data blocks The Transfer module uses the input signal and the output signal to calculate the properties of the interjacent linear and time invariant transfer system The Universal Filter eliminates distorting frequency components with user defined digital filters The Save Universal File module saves data in the Universal Fi
37. anking application client The modules for these interfaces are on the Modules tab of the browser under Inputs Outputs ICOM The Host IP address specifies the communication partner in the network You can enter the IP address as a number such as 111 100 101 111 oras the name of the client such as the computer name or web address The transport protocol such as WWW POP3 or FTP determines the port address DASYLab appends the value of the port address to the IP address with a colon For example if you select www DASYLab displays the IP address as 111 100 101 111 80 4 4 dasylab com DASYLab Using the OPC DA Client Use the OPC interface OLE for Process Control to connect DASYLab as a client with field bus systems and other hardware provided OPC servers are available as external drivers DASYLab receives data from registered OPC servers only OPC modules are on the Modules tab of the browser under Inputs Outputs OPC DA Client DA stands for Data Access During a measurement DASYLab requests data from an OPC server or outputs data to this OPC server For DASYLab as the client it is irrelevant where the OPC server is located The following situations are possible e The server is located on the same computer as the client In this case the server is called a local server which runs locally on a computer but ina different address space than the client application The communication between the OPC client and the OPC server runs
38. at you cannot use with other hardware drivers The sound driver is a default driver The NI DAQmx driver is a DLL driver you can combine with other drivers in a measurement Specify in the configurator the hardware driver for the device you are using The configurator displays the first time when the installation is complete in order to for example request the license number The Configurator Use the configurator to configure the DASYLab installation according to your tasks You can call the configurator any time from the Windows start menu for example to register the driver for a new hardware to activate the evaluation version with a valid license number or to execute an upgrade The configurator in Figure 4 1 lists all packages available on your computer The list includes different hardware drivers and field bus systems The status indicates whether a package already belongs to the DASYLab installation and the version number indicates how recent the package is Click Enable to use the selected package in DASYLab Click Disable to remove the selected package from DASYLab The package is not disabled or enabled until you click OK National Instruments Ireland Resources Limited 4 1 Chapter 4 Hardware Setup Figure 4 1 Available Packages in the Configurator B Configurator 4 File Package Help ee o gag o Registration Packages Options Enable and disable the driver for your installation Packages collection A
39. ay you can copy the settings Press lt F8 gt to copy all the settings of the current channel to the other channels Press lt F7 gt to copy only the selected setting to other channels If you use a certain module configuration regularly for example the hardware input Task AD you can save the module settings as default settings Select Default Module Settings from the context menu If you insert an analog input of the NI DAQmx driver into a worksheet this Task AD analog input now has the changed settings You cannot change the number of hardware inputs and hardware outputs because the installed driver determines the settings The module dialog box shows as many plug symbols as the hardware module has inputs or outputs If a hardware device has analog and digital inputs you must refer to the description of the driver to find out how the channels are assigned to the analog inputs and digital inputs Ifa hardware channel is disabled the channel bar of the hardware module depicts a blue plug symbol To activate the channel double click the blue plug symbol with the left mouse button To disable an active channel double click an orange or a green plug symbol with the right mouse button Creating Partial Solutions in Black Boxes Use black boxes to create sub worksheets in order to combine partial solutions in a complex worksheet At the same time you increase the number of possible modules the worksheet can contain by 255 with ea
40. ble click the Formula Interpreter module to open the dialog box c Click the Plus sign under Input channels to create a second channel input Note Do not click the Plus button next to the channel bar That a creates a second channel output National Instruments Ireland Resources Limited 1 5 Chapter 1 Getting Started with DASYLab 2 Click the input field Formula and enter the following formula IN 0 IN 1 The formula subtracts the values of the second input channel from the values of the first input channel Figure 1 4 shows the dialog box of the Formula Interpreter Figure 1 4 Online Calculation with the Formula Interpreter Formula Interpreter X Input channels Formula00 Module name Short description Inputs PIE gao mMm e 13 w 15 rT TTT M Channel name Formula 0 unt E IN OHIN 1 Functions Operators Inputs Trigonometry Constants Variables You also can use the buttons underneath the input field to enter terms and operators DASYLab inserts the selected terms into the formula at the cursor position 3 Click OK DASYLab adds a second input to the Formula Interpreter For the online calculation the Formula Interpreter must receive the generator signals from two inputs and must output the results to the Y t Chart 4 Click the top data channel that connects the Generator and the Y t Chart The mouse pointer now changes shape to
41. ble during a measurement open Options Global Variables and Strings Define Global Variables To assign a text to a string open Options Global Variables and Strings Define Global Strings In these dialog boxes you also can edit the default configuration of variables and strings before and after a measurement For example you can assign names to variables and strings which DASYLab displays instead of the system names You can select several variables and strings to assign the same value to these variables and strings DASYLab saves the definitions of the variables and strings together with the worksheet For other worksheets to use these configurations select Options National Instruments Ireland Resources Limited 5 5 Chapter 5 Controlling Measurements Global Variables and Strings Export Global Variable String to export the variables and strings into a file with the filename extension var If you want to import the configuration select Options Global Variables and Strings Import Global Variable String in the target worksheet and enter the same VAR file You cannot edit VAR files because these files have a binary format If you want to transfer only the value of a variable or of a string from one worksheet to the next enable the settings Write to INI file when measurement stops or Read from INI file when measurement starts in the global variable or global strings definition dialog box When the measurement stops DASYLab save
42. blocks from module to module DASY Lab does not output a data block to the next module until the current data block is completely filled with data DASYLab distinguishes measurement data which are from the measurement devices and data sources and which most modules output spectral data which are the result of a fast Fourier transform and histogram data which contain the count results of a classification DASYLab outputs a time stamp the sampling rate and the block size with every data block The size of the data blocks and the sampling rate determine the processing speed which in turn determines the data flow in the block diagram The Block size specifies how many values a data block contains The Sampling rate specifies how fast DASYLab generates data or requests the measurement values from the board The Response time in the block diagram depends on the ratio between the block size and the sampling rate Table 7 1 lists the response times for some block sizes and sampling rates Table 7 1 Response Time Sampling rate Response time Block size 1 Second Second 1 1 1 1 1000 0 001 1000 1 1000 The response time specifies the period of time in which DASYLab accesses all modules in a worksheet Depending on the size of the worksheet and the computer power DASYLab cannot undershoot a certain limit If for example the worksheet comprises 100 modules and the specified block size to sampling rate ratio is 0 0
43. ch black box A worksheet without a black box can contain a maximum of 256 modules You can insert up to 256 black boxes in one worksheet on the same worksheet level or in a hierarchy in black boxes This way you can arrange partial solutions horizontally and vertically 2 6 dasylab com DASYLab BlackBox To insert a black box in the worksheet select SpecialEmpty on Black Box on the Modules tab of the browser and drag and drop the module into the worksheet Double click the black box to open the workspace of the sub worksheet The empty sub worksheet takes up the entire workspace of the worksheet screen You work in a black box in the same way as you work in the main worksheet you drag and drop modules from the browser and connect and configure the modules You establish a connection to the main worksheet or to the higher ranking black box with import and export modules You must open a black box before you can select the Export Import module from the Special modules group on the Modules tab in the browser If you drag and drop an export import module into the black box DASYLab opens a selection dialog box Select Import Data to create inputs to the black box Select Export Data to create outputs from the black box You can use only one import module and one export module with a maximum of 16 channels each in every black box The number of outputs does not depend on the number of inputs The block length and the data rate of the inputs
44. dow 1 3 3 1 Edit 3 2 DLL driver 4 3 Documentation frame 2 2 E Event search 3 5 Extension toolkit A 8 External editor 6 3 National Instruments Ireland Resources Limited 1 1 Index F FAQ B 1 FIFO graph 1 10 FIFO list 1 10 Formula Interpreter 1 5 Formula interpreter 1 5 Formulas 1 6 Full screen mode 3 12 G Generator 1 2 Global string 5 5 Export 5 5 Global variable 5 5 Export 5 5 Graphic link 3 12 Grid 2 2 H Hardware 4 1 Default driver 4 3 DLL driver 4 3 IEEE488 interface 4 6 Information area 2 1 Input instruments 3 1 Coded switch 3 10 Slider 3 10 Switch 3 9 Installation Configurator 4 1 Interfaces 4 1 DDE 4 4 IEEE 488 4 6 IVI 4 6 ODBC SQL 4 5 OPC 4 5 RS232 4 5 TCP IP 4 4 l 2 dasylab com IVI interface 4 6 L Layout 3 10 Full screen mode 3 12 Graphic link 3 12 Page settings 3 11 List 3 8 M Measurement setup 7 2 Module bar 2 4 Module functions 6 2 Modules 1 1 Action 5 2 Add on modules A 8 Configure 2 4 Connect 2 3 Control A 5 Control input 5 1 Copy 2 3 Copying inputs 2 2 Data reduction A 7 Display A 6 Export 2 7 Files A 6 Import 2 7 Increasing the number 2 6 Inputs and outputs 2 4 4 1 A 1 Mathematics A 2 Module bar 2 4 Network A 7 Overview A 1 Replace 2 3 Script 6 1 Search 2 4 Signal analysis A 4 Special A 8 Statistics A 3 Trigger functions A 2 DASYLab O ODBC SQL interface 4
45. e Passive layout elements are layout labels or decorations and are not linked to the modules in the worksheet Passive layout elements are graphical objects such as lines circles ellipse outlines rectangles filled ellipses or texts You can use figures in BMP format or WMF format as a background picture or as a logo DASYLab creates a reference to the graphic file but does not integrate the file in the layout If you copy a worksheet with a layout to a different 3 12 dasylab com DASYLab computer you must also copy the graphic files into the respective folder If you select Options Default Folders you can find the name and the path of the folder Other Use the Text line layout element to include simple titles or comments in the layout You can rotate a text line for example to position the text vertically next to a display window Use the layout element Text block to create multiline continuous text Use variables and strings to display the current time the date or other system information in the layout National Instruments Ireland Resources Limited 3 13 Hardware Setup DASYLab supports many standard measurement and control boards and various interfaces in order to communicate with external devices When you install DASYLab you select the DASYLab driver for your measurement acquisition board DASYLab distinguishes between DLL drivers that you can use in a worksheet with other hardware drivers and default drivers th
46. e waterfall diagram you must select which connected data channel the Y t chart is to display in 3D The waterfall display shows the last plotted curves for this data channel in a cascaded display The curve in the foreground shows the current data The z axis reflects the data history that you can track with the measurement time or the block number Figure 3 2 shows the last ten results of a Fast Fourier analysis with hidden line calculation that deletes all hidden lines National Instruments Ireland Resources Limited 3 5 Chapter 3 Visualizing Measurements Figure 3 2 Waterfall Display of an Online FFT u UY j 1a H A P He 1s H T T T T T T TT Eoas soas 1S as SAME 235 256 AS HHS 356 305 HE HS asi dis The color sonogram which is similar to the temperature maps of the meteorologists displays the first data channel that is connected to the Y t chart in a color sonogram To do so the Y t chart divides the data into 256 classes so that each class covers a specific value area The Y t chart assigns a color to each class In Figure 3 3 high values are red and the low values are blue The color sonogram plots the color values for each data block rowwise from bottom to top so that the current color values are at the bottom and the oldest color values are at the top Figure 3 3 A Color Sonogram Displays Data as Colors The
47. easurement with lt Ctrl gt F5 Press lt Ctrl F gt to leave full screen mode and to return to the layout window If you insert an action module in the worksheet and for example connect it to a button you can trigger an action in the layout with this button For example you can change the layout save it as a graphic or print out specific layouts for specific measurement situations Active and Passive Layout Elements In the layout you position the layout elements in the workspace specify the size and align the layout elements to each other DASYLab differentiates between the active layout elements such as graphic links and text links and the passive layout elements such as text logos frames and lines fo DASYLab inserts the active layout elements as a link in the layout You can include every display module and input module that the worksheet contains in a graphic link In text links you only can include digital instruments to display measurement values numerically You can zoom in on diagrams Y t chart displays x y chart displays and chart recorder displays in the layout during a measurement Press the lt Ctrl gt key and drag open the area with the mouse button You can zoom multiple times To undo the last zoom press the lt Ctrl gt key and right click the zoomed area You can operate input instruments such as the switch or the slider in the layout for example to execute selected functions in the full screen mod
48. ecify how the script module is created and deleted in the worksheet In Create you specify the number of inputs and outputs and also the channel assignment In Delete you define clean up operations such as closing files or disconnecting hardware You program the individual module functions in the Python programming language Python has a simple syntax and a complex command structure DASYLab provides special script functions for data handling channel definitions and the settings in the module dialog box During the programming process you test the functionality of your module in the worksheet and save the module with the worksheet If you have programming experience you can also edit the script in an external editor In an external editor you can view the complete script and use the editing functions of the selected editor for programming Click Use External Editor in the module dialog box and save the script as a file National Instruments Ireland Resources Limited 6 3 Chapter 6 Programming Your Own Modules DASYLab creates a text file with the filename extension py In the module you can no longer edit the script you saved externally Instead you must load the script file into the module in order to test the programmed module functions If you use the script file in a different script module this module must have the same predefined settings and channel settings as the original script module You select the external editor in the c
49. ensions as well as for comments extracted from the code mono Bold text in this font denotes the messages and responses that the space Bold computer automatically outputs to the screen Related Documentation For more information on DASY Lab refer to the following documentation xii DASYLab Help which you open by selecting Help Contents or by pressing lt F1 gt The DASYLab help offers dialog box help for each module and for each function If you select Help Examples you can load example worksheets The examples demonstrate worksheets of varying complexity DASYLab Extension Toolkit Use the Extension Toolkit to create your own DASYLab modules The Extension Toolkit contains the description of DASYLab interfaces and the program code of some DASYLab modules If you work with the Extension Toolkit you need C programming and Windows programming skills The shipped CD comprises the documentation and example files However several additional files are missing You cannot create your own extensions with these files and therefore you also need the DASYLab Extension Toolkit dasylab com Getting Started with DASYLab With DASYLab you can complete measurement control and simulation tasks interactively on your screen Select a module for each function and position the module in the worksheet The task determines how you connect and configure the modules To acquire data DASYLab supports many standard measurement and con
50. esources Limited 3 1 Chapter 3 Visualizing Measurements F To open all windows simultaneously click Restore All Windows on the function bar To open one individual window double click the title bar of the window When you finish a measurement the display windows and the input instruments are visible in the foreground and cover the worksheet To edit the worksheet click Minimize All Display Windows on the function bar DASY Lab displays only the title bars at the bottom of the screen To hide the windows from the screen completely click Hide All Display Windows on the function bar If you start a measurement now you must click Show All Windows to make the display windows and input instruments visible again Before during and after a measurement you can move and resize display windows and input instruments DASYLab saves the arrangement and the size of the windows together with the worksheet In each worksheet you can save up to eight different arrangements in order to display other windows during a measurement or to resize individual windows To save the current window arrangement select View Save Window Arrangement For example enter MyScreen as the name and specify the position in the selection list of the function bar To select this saved window arrangement at a later time select MyScreen in the selection list You also can use the key combination lt Alt gt and the number of the window arrangement for example lt Alt 1 gt for
51. function library In the third step you register the generated script package in DASYLab An entry in dasylab ini inthe Extend section is sufficient to test the script package on the test computer Enter the name of the package and the filename extension for example DLL5 MyModule dly If you then start DASYLab the new module UserFunction is in the module group Special in 6 4 dasylab com DASYLab the browser If you insert the module in the worksheet and open the module dialog box the properties you programmed in the module function Dig nit are on the tabs Module and Channel Only the buttons OK Cancel and Help remain from those of the editable script module All functions for editing a script have otherwise disappeared Use the configurator to install your own modules on a different computer Use the action Slot to generate a package definition for the new module This action not only copies the script package MyModule d1ly on the destination computer into the DASYLab folder but also inserts the required entry into the dasylab ini ata free position in the Extend section Finally create a configurator package with the filename extension dlp The user then only has to double click this configurator package on the destination computer in order to add the new module to the already installed DASYLab National Instruments Ireland Resources Limited 6 5 Configuring the Data Flow DASYLab transports data in the worksheet in
52. g Measurements Triggering over Control Inputs cc ecececeeseeseeeececeseecesesecseeneeneeseeseees 5 1 Controlling with Actions 0 c ccccescecessesseseesecsecseceeccenceaaecsecseeseeaeeaeeneees 5 2 Synchronous and Asynchronous Actions cccccessesescereeeeeeeeeeeeeees 5 2 Control Sequencer cccescesccseeecseeneeeeseeneeneees Global Strings and Variables Chapter 6 Programming Your Own Modules Using the Script Module ceeeeeeccecceecesceseeeeseesecsecsecaecaeeaeeseeneeneeeeeeeees 6 1 Programming a SCTIPt cccceceessseescescesceeeceseceeceeceecsseasecsecsecseeseeaeeaeeeeees 6 2 Exporting a Script Modulle cccccccccsccsecssessessenseesecsecsecaeeseeseeeeeeeeeeeeees 6 4 Chapter 7 Configuring the Data Flow Optimizing Processing Time ccessesseseeeeceeceececececeecsecsecseeseeseeteeeees 7 3 Significant Digits viii dasylab com DASYLab Appendix A The Module Groups The Input Output Modules Group 0 ce eeeeceeseeeceeeeseeseeeeceetecnesneseenees A 1 The Trigger Functions Modules Group essseesesseseesreeeeersrrererersrererseseee A 2 The Mathematics Modules Group The Statistics Modules Group The Signal Analysis Modules Group aS The Control Modules Group cccccceccescesceseesecsecsecsecseeseeeeeeeeeeeesceeeneeesees The Display Modules Group cesessecescsseeceeseeeeesesesseceesesaeeevseeeeseaeea The Files Modules Group
53. g channels to display modules DASYLab executes asynchronous actions fast If DASYLab does not trigger an action asynchronous actions do not need extra computing time except for the monitoring of the input channels Control Sequencer Use the control sequencer as a worksheet test executive The sequencer connects worksheets and controls the sequence of worksheets using actions For example use a sequencer to run different tests with different worksheets in one experiment The first worksheet generates calibration settings and transfers these settings to the next worksheet Then the second worksheet controls the measurement acquisition and saves the measurement values in a file Finally the last worksheet analyzes and displays the measurement values T To create a sequencer for this test click Sequencer on the function bar DASYLab opens the sequencer program window Right click the Unknown root entry and select New Worksheet from the context menu For example load the Calibration worksheet Then load the worksheets Measure and Analyze consecutively Right click the first worksheet Calibration and select Set Start Worksheet Then create the actions that control the worksheet sequence Right click the Calibration worksheet and select New Action from the context menu Select the condition that the value of the variable VAR_101 changes and then select the action Load and start of the Measurement worksheet Then create a second similar ac
54. g signals manually with a Scroll bar a Slider or a Rotary switch during a measurement The value range specifies the smallest and the greatest value and the resolution specifies the intervals between the individual values If you enable several data channels in the module you can create several varying sliders side by side or on top of each other However you can use only one slider type in a module Move the slider with the mouse to the value that the manual slider outputs Use the slider to change the settings of other modules during a measurement for example the amplitude of the generator Coded Switch Use the coded switch to manually output one of several values previously entered during a measurement Turn the Rotary switch stepwise to the value and DASYLab outputs this value as soon as you release the rotary switch If you use the Button switch click the respective button and for the List box select the value from a list You can create four coded switches side by side or on top of each other However you can only use one switch type ina module Use the coded switch for example to control an actuator with up to 16 positions You specify the positions in the coded switch and can then accurately approach each position Creating Layouts Create layouts to visualize and to document your measurements In a layout you combine display windows with text and graphics to design visualization screens You can create multiple customized lay
55. ge 1 to 2 and an open valve in the range above 2 You also can use the status display as a bit display that converts every value into 16 bit integer values and displays an LED for each of the 16 bits Selecting Input Modules The following descriptions provide an overview of the functions of the input instruments and help you choose the right module for a certain task Switch Use the switch to output TTL signals manually during a measurement and to enable triggers actions or modules that have a control input A TTL signal has either the value 0 or 5 The switch types On Off switch and Switch output a signal with a constant value of 5 until you click the button again The Push button outputs the TTL signal only as long as you press this button and the One shot switch outputs the signal after you click for the length ofa data block If you enable several data channels in the module you can create several different switches side by side or on top of each other The switches Start Stop and Pause Continue are different from the other switch types These switches have no outputs because they affect the whole worksheet You can use these switches to stop or to pause a measurement and to restart a measurement Use these switches for example in the layout to control a measurement in the full screen mode National Instruments Ireland Resources Limited 3 9 Chapter 3 Visualizing Measurements Slider Use the slider to generate varyin
56. gnal Router module distributes incoming data values event driven onto several outputs Use the modules PID Control and Two Point Control to control processes The Write Global Variable module saves the incoming measurement values in variables The Write Block Time saves time information in strings The Read Global Variable module outputs values of variables to the worksheet National Instruments Ireland Resources Limited A 5 Appendix A The Module Groups The Display Modules Group The display modules group contains modules for displaying measurement values and results as complete blocks in separate display windows or in a layout You also can configure the display window during the measurement The modules Chart Recorder Y t Chart and X Y Chart display data channels as curves During the measurement you can zoom scroll and measure these curves with cursor lines The Diagram module displays data channels as a chart recorder a Y t chart or as an x y chart You can group curves in axes systems as you like and zoom and measure the curves offline The Polar Plot module displays pairs of data channels such as the measured volume around a dummy head and the corresponding angles as curves ina polar diagram The modules Digital Meter and List display data channels numerically Use the bar display of the Bar Graph module and the pointer display of the Analog Meter to display slow procedures The analog meters bar graphs and s
57. he Histogram Classification module or you can specify the file and path and change them during a measurement in the Write Data module You can use a variable or a string for most module settings for which you usually enter a value or a text Right click the input field and select Global Variable or Global String DASYLab opens the overview where you select a variable or a string When you select the first free variable DASYLab specifies the identifier VAR_1 When you select the first free string DASYLab specifies the identifier STR_1 In addition to the free variables and strings you can use system variables such as the measurement time ELAPSED_ TIME and system strings such as the current date S DATE DASYLab offers a selection of variable numbers for module settings that write a value into a variable Select an index number for the variables to be used Select Options Global Variables and Strings Global Variable String Overview for an overview of variables and strings Folders with free and used variables or strings are listed on the left side of the tree display If you click a variable the table on the right lists the definition of this variable If you open the tree on the left further you find the folder with the accessing modules and the read and write data channels If more than one data channel writes into the same variable a red folder symbol warns of write conflicts If you want to assign a value manually to a varia
58. hin 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 Copyright Under 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 National Instruments respects the intellectual property of others and we ask our users to do the same NI software is protected by copyright and other intellectual property laws Where NI software may be used to reproduce software or other materials belonging to others you may use NI software only to reproduce materials that you may reproduce in accordance with the terms of any applicable license or other legal restriction End User License Agreements and Third Party Legal Notices You can find end user license agreements EULAs and third party legal notices in the fol
59. ipment 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 wit
60. ividual x axes in the display window You scale the axes in the module dialog box To inspect the curve sections in detail and to review already displayed measurement values you must stop the display while the measurement continues To do so right click the display window and select Freeze When you freeze the display you can move and zoom the curves Use the mouse wheel to zoom the curves horizontally Press lt Ctrl gt and use the mouse wheel to zoom the curves vertically and press lt Shift gt and use the mouse wheel to zoom in both directions Use the left mouse button to move the curves National Instruments Ireland Resources Limited 3 3 Chapter 3 Visualizing Measurements horizontally Press lt Ctrl gt and the left mouse button to move the curves vertically and press lt Shift gt and the left mouse button to move the curves in both directions In horizontal direction you zoom and move all curves in all axis systems because the curves all refer to a mutual x axis In vertical direction you zoom and move curves only in the selected axis system Use the buttons on the toolbar to shift the curves in all axis systems step by step in order to review already acquired data In the freeze mode you also can measure the curves To do so select Cursor Mode from the context menu of the display window The diagram displays two movable cursor lines in all axis systems In Figure 3 1 the legend displays the values of the individual curves be
61. ksheet and only can insert 256 modules in the worksheet How can I insert more modules Use the Black Box module to create one or more sub worksheets You can find a black box under Modules Special You can create up to 256 modules in a black box like in the main worksheet You can insert a black box just like any other module Double click the black box to open a sub worksheet Use the Import Export Modules to exchange data with the level above B 2 dasylab com DASYLab Only 16 branches on a data channel I need to use a channel more than 16 times How can I create more than 16 branches Use a mathematics module with the NOP function No Operation Connect one of the data channel branches to this module and use the outputs for 16 more branches The display is too slow My worksheet takes too long to display the acquired data in the display windows What can cause that The following factors can slow down the display considerably e Your block size is too big for the sampling rate e You configured a separate module in such a way that it ignores a large number of blocks You will not see a response until the next data block passes The time behavior is the same in block wise and sample wise separation e The average module is configured to average blockwise and you did not change the output block size to reflect the data reduction The output blocksize also affects a consecutive separate module that executes a data reduction
62. le Format 58 A 8 dasylab com Tips and Tricks The following tips and tricks are designed to help you create and process worksheets Order the modules on the screen neatly Create short connections between the modules and avoid superfluous channel branches and channel crossings so that you can follow the data flow in the worksheet Try to keep all channels that go from one module to the next parallel or bundled Include as many channels as possible in a single display module A status display module with 16 data channels requires less computing power than 16 individual status display modules Label your modules so that others can easily understand the functions and tasks of the modules Save the development steps of your worksheets in files with successive names This allows you to go back to a previous development step Use black boxes to store tested subsets of the worksheet This creates a library of functions that you can re use in other worksheets If you work with many black box modules configure each with a different background color For example choose darker colors the deeper the black box lies in the worksheet Troubleshooting The following section deals with frequently asked questions A worksheet is not loaded I cannot load a worksheet I saved earlier I am using the same hardware but DASYLab reports that this worksheet does not match the installed hardware National Instruments Ireland Resource
63. les of the installed hardware driver and the interface modules for communication with external devices and programs For example if you have installed the NI DAQmx driver for National Instruments hardware the associated modules are in the sub folder NI DAQmx If you have installed the DAP driver for Microstar Laboratories hardware the associated modules are in the sub folder DAP If you have installed the sound driver you can select the sound driver under Measurement Select Driver and access the associated modules in the sub folder Driver The interface modules are in sub folders with respective names The sub folder OPC DA Client contains the modules OPC Input and OPC Output to exchange data with OPC servers which are registered on the network or the local computer via the OPC interface The sub folder DDE contains the modules DDE Input and DDE Output to exchange data and commands with other programs via the DDE interface The sub folder ICom contains the modules ICom Input and ICom Output to exchange data and text in a network via the TCP IP interface The sub folder ModBus contains analog modules and digital modules to communicate with PLCs via the ModBus protocol National Instruments Ireland Resources Limited A 1 Appendix A The Module Groups The sub folder RS232 contains the modules RS232 Input and RS232 Output to exchange data and text with external measurement devices that are connected to the serial interface
64. lly in the workspace You can specify which modules to include on the module bar Right click a module bar button and select New to open the selection dialog box Scroll through the list of available modules select a module and click OK to confirm your selection The button in the module bar now displays the symbol of the new module You can combine various task related module bars which you load according to the measurement task Select Edit Module Bar to save the current module bar to load a module bar or to create a new module bar Configuring Modules The module inputs are on the left side and the module outputs are on the right side of the module Depending on the function of the module the module might only have inputs or only outputs Modules that generate or acquire data have only outputs Modules that process data have inputs and outputs 2 4 dasylab com DASYLab Modules that display save or output data to the hardware by default have only inputs b You can change the number of terminals in the module dialog box which opens when you double click the module For example double click the generator module to open the module dialog box and specify that the generator generates three signals Figure 2 2 shows the channel bar Click the Plus button on the right next to the channel bar to create additional channels The channel bar denotes one orange plug symbol for each channel Click the Minus button to delete channels In
65. lock fo DASYLab Worksheet Gog File Edit Modules Measurement View Tools Options Window Help Pus O88 Jhan RES XOA s aasa l ixl Modules Black Box Navigator Si S E Modules a S E Inputs Outputs a E Driver a E DDE a E R5232 aE ICom E IEEE 488 E ModBus a DAP a E NI DAQmx S E OPC DA Client OPC Input EE OPC Output a Enok Eoi S E Trigger Functions a Hoi Ee 3 E Statistics v cal n gt OPC In 00 gt Display r Uae rain gt 2009 08 31 14 03 19 TRIGG DLL loaded Kernel kad 2009 08 31 14 03 19 SERIAL DLL loaded Kernel 2009 08 31 14 03 19 REDUC DLL loaded Kernel 2009 08 31 14 03 20 MATH2 DLL loaded Kernel ANNA NO 34 1 NDAN ONU ICCC OI laadad Nana FIFO Parameter Value AE 19 12 Output FFT Ch Input Display Black ciza 517 bal lt i gt 0 00 O RE 2 36 46 11 mi National Instruments Ireland Resources Limited 2 1 Chapter 2 Defining Measurements The data flow starts on the left with a data source such as the input modules of the installed hardware the generator or the input instruments Scaling modules and evaluation modules follow On the right the data flows into data sinks such as the display modules and the file modules for saving data For example if you want to acquire data from the installed plugin board from National Instruments select the data source Inputs Outputs NI DAQmx An
66. low the cursor lines As soon as the measurement restarts the cursor lines disappear Figure 3 1 Measuring the Curves in the Diagram in Freeze Mode Wa Diagram 0 V X1 50 2619 Y1 4 0000 X2 50 5332 Y2 4 0000 DX 0 2714 DY 8 0000 OX 0 0886 OY 0 8138 Diagram1 v X1 50 8175 Y1 3 5647 X2 50 5371 Y2 2 8912 DX 0 2804 DY 0 6735 OX 0 0000 OY 0 0000 Diagram 2 V X1 50 8175 Y1 2 8009 X2 50 5371 Y2 2 0571 DX 0 2804 DY 0 7438 OX 0 0000 0Y 0 0000 50 30 50 40 50 50 Diagram 3 v 50 30 50 40 50 50 X1 50 8175 Y1 0 7002 X2 50 5371 Y2 1 4857 DX 0 2804 DY 0 7855 OX 0 0000 OY 0 0000 50 10 50 20 50 30 50 40 50 50 50 60 Chart Recorder Use the chart recorder to display data channels as curves in 2D axis systems over time The chart recorder plots the curve from right to left and is suitable for recording slow long term measurement data that has low sampling rates In the chart recorder you can zoom the curves during a measurement like in the Y t chart in order to inspect curve sections in detail Use the magnifying 3 4 dasylab com DASYLab glass on the toolbar of the display window to zoom in or out of the section repeatedly DASYLab displays a scroll bar below the zoomed section with which you can move the section In the Chart Recorder you can inspect one curve or all curves for a certain event You describe an event
67. lowing locations e Notices are located in the lt National Instruments gt Legal Information and lt National Instruments gt directories e EULAs are located in the lt National Instruments gt Shared MDF Legal license directory e Review lt National Instruments gt _Legal Information txt for more information on including legal information in installers built with NI products Trademarks Refer to the NI Trademarks and Logo Guidelines at ni com trademarks for more information on National Instruments trademarks ARM Keil and Vision are trademarks or registered of ARM Ltd or its subsidiaries LEGO the LEGO logo WEDO and MINDSTORMS are trademarks of the LEGO Group 2013 The LEGO Group TETRIX by Pitsco is a trademark of Pitsco Inc 2013 FIELDBUS FOUNDATION and FOUNDATION are trademarks of the Fieldbus Foundation EtherCAT is a registered trademark of and licensed by Beckhoff Automation GmbH CANopen is a registered Community Trademark of CAN in Automation e V DeviceNet and EtherNet IP are trademarks of ODVA Go SensorDAQ and Vernier are registered trademarks of Vernier Software amp Technology Vernier Software amp Technology and vernier com are trademarks or trade dress Xilinx is the registered trademark of Xilinx Inc Taptite and Trilobular are registered trademarks of Research Engineering amp Manufacturing Inc FireWire is the registered trademark of Apple Inc Linux is the registered t
68. ls and to combine several data channels with each other In the Arithmetic module you select predefined functions to calculate one data channel or to link two channels The Trigonometry module uses A 2 dasylab com DASYLab trigonometric functions for data channels and the Differentiation Integration module differentiates or integrates data channels To scale data channels you can use various modules linear scaling scaling with table of reference points thermocouple linearization PT100 NI100 linearization and offset adjustment The Comparator module compares one channel with a constant or two channels with each other and outputs a TTL level if the values are similar equal or greater The Logical Operations module links TTL signals to each other The Flip Flop module provides the functionality of various flip flops D Flip Flop JK Flip Flop RS Flip Flop and Monoflop The Bit Mask module converts measurement values into binary numbers in order to shift bits or to combine bits and to output the new values The Gray Code module uses the gray code to decode the angle encoder signals Use the Slope Limitation module for example to cut off peaks in a data channel caused by outliers The Reference Curve module calculates a tolerance range for data channels and saves the mean values and the values of the maximum and minimum curve in a file that the statistics module Check Reference Curve and the display module Chart Recorder use
69. ng of a signal The Harmonic Distortion calculates in the frequency range the amplitude and the phase of the fundamental frequency and up to 48 harmonic frequencies A 4 dasylab com DASYLab The Electro Technical Characteristics module performs calculations from two incoming current and voltage data channels for example the power the phase angle or the input frequencies The Polar Cartesian module converts polar coordinates into cartesian coordinates and vice versa The Resample module converts vibrations at a rotating axis into the rotation angle for example the vibrations of an engine shaft The Control Modules Group The control modules group contains modules for generating signals for controlling the data flow in the worksheet and for executing control functions The Generator module generates various signals such as rectangular signals sine signals or sawtooth signals The Sequence Generator module generates time dependent analog set points and digital control commands with a user defined program Use the modules Switch Slider and Coded Switch to enter data manually during a measurement The Time Delay module outputs incoming data channels with a time delay The TTL Pulse Generator generates TTL signals time dependent in order to control processes The Stop module terminates the measurement The Latch module outputs the last data value continuously event driven or after a signal at the control input The Si
70. nge the channel properties while you develop your module As soon as you export the module and include it in the application DASYLab closes this access Like all DASYLab modules the script module has a channel bar where you select the data channels before a measurement The settings are on two tabs Channel for the channel settings and Module for the module specific settings The first time you open the module dialog box you find the three parameters a b and c on the two tabs These parameters are placeholders for the settings which you still have to define in the script Programming a Script You program the functionality of the script module in a script Click Edit in the module dialog box to create a script on several tabs Each tab represents a specific module function which the module calls at specific events such as the start of the measurement or opening the module dialog box The following overview is a list of the individual module functions e info pyar These module functions provide variables which specify the module properties In info you initialize the variables which DASYLab saves with the worksheet In pvar you create temporary variables which are only available during the measurement DigInit DigEvent DIOK DigCancel These module functions specify the settings in the module dialog box In DlgInit you specify the settings for the module and for each channel In DigEvent you define 6 2 dasylab com DASY
71. ocedures for example to create a diagram of bearing load rotational frequencies The Signal Analysis Modules Group The signal analysis modules group contains modules for calculating frequency components of signals or for analyzing the similarity of signals The FFT Fast Fourier Transform module transfers signals from the time domain into the frequency domain You can calculate real FFTs or complex FFTs or you can calculate an inverse FFT to transfer a signal from the frequency domain into the time domain The FFT Filter module filters specific frequency components from the results of an FFT whereas the modules FFT Maximum and nHarmonic search for maximum values in the FFT results Use the Data Window module to multiply data channels with non periodic signals with a window function to prepare the data channels for an FFT The Third Octave Analysis module adds up the amplitude values of the FFT in standardized logarithmic frequency intervals in order to determine the volume in frequency ranges instead of the amplitude of each individual frequency The Digital Filter module filters data channels with digital IIR filters The Correlation module uses the cross correlation to calculate the statistical similarity of two data channels and uses auto correlation to calculate how well a data channel matches a time shifted version of itself The Period Check module uses a specified zero line or reference line to search for the first zero crossi
72. olled or amplitude controlled in order to only output data of the active data channel The Circular Buffer module saves incoming data and outputs the data event driven In contrast the Shift Register module collects the values of every data block and then outputs the new data block event driven The Network Modules Group The network modules group contains modules for exchanging data and messages in networks If your installation includes the DASYLab net license you can use up to 32 network modules in one worksheet Multiple DASYLab programs that are installed on different computers in one network can communicate using the modules Net Input and Net Output Use the Message module to create messages or warnings which you can send via the Message Output module to a Message Input module in the worksheet on another computer in the network The modules DataSocket Import and DataSocket Export exchange data with OPC servers and National Instruments DataSocket servers National Instruments Ireland Resources Limited A 7 Appendix A The Module Groups The Special Modules Group The special modules group contains various modules with special functions such as black boxes and actions Use the Empty Black Box module to create sub worksheets in order to structure complex worksheets and to increase the possible number of modules in the worksheet The Black Box module communicates with the worksheet using the modules Export and Import which c
73. onfigurator Exporting a Script Module The reason for programming script modules is to have new modules in DASYLab Users can select the new modules in the browser and configure them after inserting them in the worksheet If you want to share a script module with another user you must export the script with the programmed script You then generate a script package from one or several exported script modules and register this script package in DASYLab In the first step you double click the script module and select Export DASYLab opens the export dialog box with the basic settings and the optional additions Enter for example UserFunction on the Basic Settings tab as the name for the module and select the module group Special Specify the folder in which DASYLab saves all files for the new module On the Additions tab you can assign a help file and a graphics symbol to the module Note Note that entries and filenames are case sensitive Python 4 as well as DASYLab differentiate between names that are only lower case and those that are also upper case newmodules lt gt NewModules In the second step you open Options Create Script Package and enter the name of the script package MyModu1e the source folder with the exported script modules and the destination folder for the script package In the destination folder DASYLab creates a script package with the filename extension dly MyModule dly A script package is similar to a
74. opy inputs check box b Click OK DASYLab creates three outputs in the Digital Meter module 3 Drag the Write Data module next to the Digital Meter module until the digital meter outputs touch the inputs of the Write Data module When you release the mouse button DASYLab automatically connects the two modules with three data channels The worksheet looks similar to Figure 1 7 4 Start a measurement gt Figure 1 7 The Worksheet Displays and Saves Data FD DASYLab Worksheet Joe File Edit Modules Measurement View Tools Options Window Help gt un O68 JHO REAA X s aasal Modules Black Box Navigator E Modules SE Inputs Outputs S E Trigger Functions E E Mathematics Statistics E Signal Analysis E Control S E Display 8 Files Read Data E Write Data E Digitat Meo0 0 VA Chartoo Jel seem Aes Display Survey Text Help QD Pett Se SS A eA 50 25 oo 2 5 a F I I I I e n 2 0 78 100 150 200 250 300 350 Ya Chart 0 YA Chart 1 Ya Chart 2 ms 5 Stop the measurement after some time a Note You can examine the contents of every data channel 1 10 during a measurement If you click a data channel DASYLab displays the data flow of this data channel as a curve in the FIFO graph of the information block In the FIFO list DASYLab dasylab com DASYLab displays various parameters of this data channel such as the sampling rate the block size and the current value
75. outs for visualization and documentation You use actions driven by events to exchange the layout displayed on the screen or to print out measurement reports To create a layout click Layout on the function bar DASYLab creates a new layout in the layout window if you have not yet created a layout In the layout window you work with an additional toolbar to place layout elements in the workspace Layout elements are graphic links to display windows and input instruments texts logos frames and lines To edit sections of the layout in more detail right click and select Zoom from the context menu 3 10 dasylab com DASYLab Figure 3 5 Screen Layout with Display Windows and Switches D DASYLab Layout 1 max Fie Edt Object Measure View Options Window Help gt na O66 M O REAA XAB loyout uo 00009 OLANE KOR A EA EEE 50 LE OE E EE E EEEE o 5 0 u T z T 5 T iv T T 7 T 5 3940 15 39 50 15 40 00 15 40 10 15 40 20 15 40 30 15 40 40 397 329 370 recente himins ON orr e IEU STOP orrF on 5 0 5 0 2 5 00 25 50 ji Oor eor Tm rae hil gt O N oar a To create a display window like the Y t chart in the layout click Link Graphic on the toolbar and drag open the rectangle anywhere in the layout Double click the empty rectangle and select the Y t Chart from the module drop down list When you start a measuremen
76. ple if you want to integrate a rotary switch select Control Coded Switch on the Modules tab of the browser Click Options in the module dialog box and select Rotary switch Selecting Display Modules The following descriptions provide an overview of the functions of the display windows and help you choose the right module for a certain task Diagram Use the diagram to display data channels as curves in 2D axis systems You can use the diagram like the chart recorder which plots the curves from right to left or like the Y t chart which plots the curves from left to right or you can use the diagram like the x y chart which plots the relationship between channel pairs The diagram cannot only display all data channels in one axis system or every data channel in a separate axis system but can also combine selected data channels in axis systems DASYLab plots all curves over the same x axis so that you can compare the curves with each other To display a further channel in an axis system right click the axis system and select Add Channel from the context menu and then select the data channel for example Temperature To remove a channel from an axis system select Separate Channel from the context menu The diagram displays the separated channel in a new axis system You also can add and separate data channels during a measurement Before you start a measurement you can change the heights of the individual axis systems by moving the ind
77. pter 3 Visualizing Measurements Display Windows and Input Instruments 000 0 eeeeeereeeceeeeeeeceeteeeeeee 3 1 Selecting Display Modules 0 eeeeseseseseeeseseeceececesnenenecerteeseeeesenseenenes 3 3 Dia stain 3 assesses a esi cadens ttn ee ea Chart Recorder aces YA Chart eran area E EEE a E a Analog Meter ooreet rana rA ETA AAE EEr o A ANS Bar Graph sisanra n a ae e RA eee Status Display AA S EAEE E AE AE E tes National Instruments Ireland Resources Limited vii Contents Selecting Input Modules 1 3 9 Swithin wee 3 9 SCs he ees Bad tae he dee bead nl a aes 3 10 Coded SwitChiscsseshicsiig i aa a E e E E ET mentee 3 10 Creating Layouts secseseiseseittes or eE oE EE EEKE an Eae 3 10 Active and Passive Layout Elements cccccesceseeseeseeeceeceeeeeeeaes 3 12 Chapter 4 Hardware Setup The Configurator noi S E AEE E E A 4 1 DLL Driver 4 3 Default Driver wee 4 3 Eaa ETA sts c 5 sche Me te Set aS atta E ecient od 4 4 Using Online DDE esesessseeseseossseseseeseseseesesessseesosecesesessesosseeesesesse 4 4 Exchanging Data over TCP IP ccccssssescsssessecseeecnesessecneeensceeeeeees 4 4 Using the OPC DA Client 0 0 cc ccceccesceesceeceeceseeseeseeseeaecneeneenaeneente 4 5 Reading and Writing ODBC Databases we AS The RS232 Interface wee 45 The IEEE 488 Interface we 4 6 The TV nterface no decks Sie ta Bie ess 4 6 Chapter 5 Controllin
78. r Output rate Output start Disk Disk streaming streaming v Enable File File All Users Documents DASYLab 11 0 0 ENG data DEFWRITE DDF tions Depending on the installed hardware DASYLab provides further timers apart from the system clock and the default driver clock Click Time Base Setup on the function bar to view the tabs of the available timers and to change them The DASYLab tab contains the system clock settings The Driver tab contains the default driver settings If you install DLL drivers with individual sampling rates such as NI CAN or instruNet the time base settings dialog box also contains the tabs NI CAN and instruNet 7 2 dasylab com DASYLab Optimizing Processing Time The overall operating performance of DASYLab depends on the hardware resources of the computer on the data acquisition device and on the complexity of the worksheet The following section provides tips on how to increase the DASYLab operating speed Increase the amount of memory RAM on your computer If you often write into the Windows swap file your system slows down e The more powerful your computer is the higher the sampling rates can be e Disable unnecessary display functions such as the grid display in the display windows e Enable the fixed time base setting in the Axes menu e Ifyou measure with a high sampling rate for example to process high frequencies with an FFT you
79. rademark of Linus Torvalds in the U S and other countries Handle Graphics MATLAB Real Time Workshop Simulink Stateflow and xPC TargetBox are registered trademarks and TargetBox and Target Language Compiler are trademarks of The MathWorks Inc Tektronix Tek and Tektronix Enabling Technology are registered trademarks of Tektronix Inc The Bluetooth word mark is a registered trademark owned by the Bluetooth SIG Inc The ExpressCard word mark and logos are owned by PCMCIA and any use of such marks by National Instruments is under license The mark LabWindows is used under a license from Microsoft Corporation Windows is a registered trademark of Microsoft Corporation in the United States and other countries Other product and company names mentioned herein are trademarks or trade names of their respective companies Patents For patents covering National Instruments products technology refer to the appropriate location Help Patents in your software the patents txt file on your media or the National Instruments Patent Notice at ni com patents Export Compliance Information Refer to the Export Compliance Information at ni com legal export compliance for the National Instruments global trade compliance policy and how to obtain relevant HTS codes ECCNs and other import export data WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS 1 NATIONAL INSTRUMENTS PRODUCTS ARE NOT DESIG
80. rder the Y t chart the x y chart and the polar plot display your measurement data as curves The list and the digital meter display data in numeric form Freely scalable analog instruments bar displays and status displays help with process controls and test controls Use the input instruments switch slider and coded switch to input values generate pulses or trigger actions during a measurement Display modules and input modules have windows which you can position freely on the screen and which you can configure during a measurement Use the DASYLab layout window to create the visualization screen You position display and input modules in the layout and add text and graphics You also can create several layouts to document your measurement You print out these layouts either manually or event related during the measurement You save the solution which comprises the worksheet the display screen and the documentation layout in a file with the filename extension dsb This way you can create solutions for each measurement task on your computer in order to load the solutions onto the measurement system on site Display Windows and Input Instruments Every display module and every input instrument which you integrate into the worksheet has its own window which DASYLab initially minimizes and displays at the bottom of the screen When you start a measurement the window does not open automatically National Instruments Ireland R
81. re DSB Measurement stop gt Write variable 200 D Seq_Measure DSB Measure amp save data Measurement start gt Read variable 200 Measurement start gt Display in full screen mode 1 Rising edge VAR_102 gt Load and start 5eq_Analyse DSB Rising edge 4R_103 gt Load and start Seq_Calibrate DSB Seq_Analyse DSB Data analysis r Measurement start gt Display in full screen mode 1 Value changed VAR_105 gt Load and start Seq_Measure DSB Measurement stop gt Layout to clipboard 1 Move the worksheets in the sequencer window to change the sequence Move an action to create a copy of the action Use the context menu to delete worksheets and actions and to edit actions To save the sequence click Save on the function bar of the sequencer DASYLab saves sequences with the filename extension dsq If you execute a sequence on another computer you must copy the current worksheets into the folder specified on the target computer under Options Default Folders A DSQ file contains only references to the worksheets 5 4 dasylab com DASYLab Global Strings and Variables DASY Lab provides 999 variables and strings in order to read to change and to transfer individual values and text stings during a measurement For example you can read the number of processed values in the Statistical Values module you can specify the number of classes in t
82. s Limited B 1 Appendix B Tips and Tricks DASYLab does not save the measurement board settings with the worksheet If you made changes to your board settings since you last ran the worksheet DASYLab cannot recognize or reset the changes In order to use the worksheet again you must restore the hardware settings to match the worksheet For example switch the board from 8 DIFF to 16 SE and if necessary reactivate the expansion boards that were active when you saved the worksheet Real time output yes or no I want to connect a switch module to a digital output Should I select the Output in real time option Whether or not you select this option depends on the output mode setting of the digital output module If the output is set to synchronous output in real time must be enabled If the output is asynchronous output in real time can be disabled If Output in real time is not active the data is generated as fast as possible usually faster than the synchronous digital output can process the data If the switch is toggled the output first processes all the data held back before the change can take effect If the output is asynchronous the data is processed as quickly as it is received the data is not held back in the same way This tip applies also to any module that generates data slider generator switch and is output to an analog output on the acquisition board Maximum worksheet size I want to build a complex wor
83. s the current value However the digital meter also can display the mean value the root mean square the minimum or the maximum of the current data block You can add a trend display which shows whether the last value was greater or smaller than the previous value to the digital meter DASYLab displays if the upper limit is exceeded or the lower limit is undershot with color changes If several data channels are connected each data channel has its own digital meter in the display window List Use the list module for the numeric display of data channels in a table The table displays one column for each data channel The first column can display the measurement time the time or the measurement numbers Whereas the digital meter always displays the current value you can look back at previous measurement values with the scroll bar in the list module Analog Meter Use the analog meter to display the values of the connected data channels in a gauge display By default the analog meter displays the current value However the analog meter also can display the mean value the root mean square the minimum or the maximum of the current data block If several data channels are connected each data channel has its own analog meter in the display window The scale can comprise a quarter circle or a three quarter circle like a tachometer You can highlight the upper or the lower limit range of a scale in color you can enable the trend display and
84. s the last value of the variable or of the string in this INI file in order to read them when a new worksheet starts To do so both worksheets must contain these variables and strings 5 6 dasylab com Programming Your Own Modules In DASYLab modules are function units The module is the container in which the functions are embedded The worksheet combines several modules in order to acquire scale analyze and display data You configure the modules to tailor the functions to your application The script module enables you to program functions yourself To do so the script module offers the container which has no functions You create the functions with a script which can run in this container For example you can create module inputs and module outputs for measurement hardware not supported by default You can program mathematical functions for a processing module in order to analyze data However you cannot create visualization modules as a script module Using the Script Module The script module is in the Special modules group in the 4 browser If you select the module in the browser and drag it into the worksheet the dialog box Predefined Settings opens The predefined settings specify the number of inputs and outputs and their connections This specifies the tasks for which you want to use the module Modules that read data froma file and pass this data on to the worksheet only need outputs Modules that receive data
85. slower than with an InProcess server because Windows must transfer the data from the server process to the client process e The server is located on a remote computer and can be accessed over the network This is a remote server The communication between the OPC client and the OPC server runs slower because Windows must transfer the data from the server computer to the client computer over a network Reading and Writing ODBC Databases DASY Lab reads and writes data and additional information to ODBC Open Data Base Connectivity databases via the ODBC interface DASYLab can access every database that is registered as a data source via the Windows ODBC administrator The modules for these interfaces are on the Modules tab of the browser under Files The ODBC modules do not have inputs or outputs because DASYLab uses variables and strings to exchange data Actions control the data exchange event driven The RS232 Interface Via the RS232 interface DASYLab receives data and text from external measurement devices or sends data and control commands to measurement devices that are connected to the serial interface The received character strings can contain measurement values and any text to which DASYLab assigns strings The RS232 Input module can receive measurement values and texts on one data channel or on separate data channels The RS232 National Instruments Ireland Resources Limited 4 5 Chapter 4 Hardware Setup Output module
86. t DASYLab displays the values in the layout just like in the display window of the Y t chart To insert a logo click Bitmap on the toolbar and drag open a rectangle Double click the rectangle and select the logo file For each worksheet you can create up to 200 layouts with Window New Layout To delete the layout select Window Delete Layout Page During a measurement you can use the selection list in the layout window function bar to change the layout or you can use event driven actions Refer to Controlling with Actions in Chapter 5 Controlling Measurements for more information about actions Specify the size of the workspace in the Layout Page Setup dialog box which you access from the context menu You can specify the page size the screen display and various paper formats for the online documentation You National Instruments Ireland Resources Limited 3 11 Chapter 3 Visualizing Measurements also can enter a name for the layout which DASYLab displays in the selection list on the function bar Select Layout Settings from the context menu to limit mouse operation to input instruments or to enable the full screen mode when a worksheet is loaded Press lt Ctrl F gt to enable the full screen mode during the measurement DASYLab hides all worksheet elements such as the function bar the title bar the module bar the browser and the info block In full screen mode you start a measurement with lt F5 gt and stop the m
87. tatus displays are freely scalable and help visualize procedural operations on test stands The Files Modules Group The files modules group contains modules for reading and saving data The Read Data module reads ASCII IEEE FlexPro and DASYLab DDF file formats The ODBC Input module reads data from ODBC databases The Write Data module saves data in ASCII IEEE DaDisp DAP Vector DASY lab DDF NI TDM and DIAdem DAT Famos FlexPro nSoft Remus and SignalysDOS files The ODBC Output module writes data into ODBC databases The Backup Data module archives already saved data on external storage media A 6 dasylab com DASYLab The Data Reduction Modules Group The data reduction modules group contains modules for reducing large data quantities to specified characteristic values or data sections The modules Average and Block Average reduce data blockwise to mean values or to extreme values Use the Separate module if the sampling rates are high in order to output just one value from each data block or to output just one data block after a number of rejected data blocks The Cut Out module outputs only a specific number of the first values in every data block The Multiplexer module combines several data channels into one data channel whereas the Demultiplexer module distributes one data channel onto several data channels either value wise or blockwise The Signal Switch module changes the data input either time contr
88. tion which loads and starts the worksheet Analysis due to a value change of the VAR_2 variable If you now start the measurement DASYLab loads the Calibration worksheet The calibration runs until an action in this worksheet assigns a new value to the VAR_101 variable Then DASYLab loads the Measure National Instruments Ireland Resources Limited 5 3 Chapter 5 Controlling Measurements worksheet and runs the measurement until the variable VAR_102 receives a new value DASYLab loads the Analyze worksheet and displays the measured values in the open display windows The sequencer window shows the worksheets and the actions in a tree display as in Figure 5 1 Use the context menu to enter comments about each worksheet that explain the sequence and appear with the worksheet name in the sequencer tree The worksheet that starts the sequencer is additionally labeled Start The condition and the function to execute is specified behind each action Figure 5 1 Sequencer for Calibration and Analysis TD DASYLab Sequencer Jog Fie Measurement View Options Window Help pim SR Jya REAA ddA l j seq_sequence dsq D Seq_Init DSB Start Initialize Measurement start gt Display in full screen mode 1 Rising edge A4R_100 gt Load and start Seq_Calibrate DSB D Seq_Calibrate DSB Calibrate 4 Measurement start gt Display in Full screen mode 1 Rising edge A4R_101 gt Load and start Seq_Measu
89. trol boards and various interfaces in order to communicate with external devices DASYLab has a number of measurement control and analysis modules e Analog and digital inputs and outputs e Trigger functions e Mathematics and statistics functions e FFT and digital filters Use the respective modules to create logical switches and open and closed loop controllers or use the sequence generator to create exact time dependent controls with complex control signals You can save the measurement data for later off line analysis in different file formats The diagram chart recorder the Y t Chart and the X Y Chart display your measurement data as curves The Diagram and the Digital Meter display your data in numeric form Freely scalable analog instruments bar displays and status displays help with process controls and test controls Q Tip Appendix A The Module Groups lists all available modules The Configurator section of chapter 4 Hardware Setup describes the configuration of your installation National Instruments Ireland Resources Limited 1 1 Chapter 1 Getting Started with DASYLab Creating a Simple Worksheet When DASYLab starts the DASYLab worksheet window opens with the menu bar at the top of the window the function bar underneath and the browser on the left side of the window Complete the following steps to create a worksheet with a data source and a display module 1 Click the Modules tab in the
90. ules or individual module channels or DASYLab as the receiver if you want to execute actions that affect the entire worksheet Many actions require additional information such as the name and the path of the data file to be created To open an overview of all actions defined in the worksheet select Options Overview of Actions The list contains the names of the action modules the actions the trigger events and the receivers You can open a second list that contains only the actions of one action module via Options Action List Synchronous and Asynchronous Actions DASYLab differentiates between synchronous and asynchronous actions DASYLab executes synchronous actions at the data block that meets the condition To do so the data block must arrive at the action module and the module that receives the action synchronously and must have the same block start time For example use synchronous actions to print visualized data in 5 2 dasylab com DASYLab real time The synchronization is like an additional invisible data channel which uses computing time even when DASYLab is not executing an action DASYLab executes asynchronous actions directly after the condition is met An asynchronous action influences the data block processed by the executing module This need not be the data block that triggered the action Use asynchronous actions when the action is independent of the data to be processed for example connecting and disconnectin
91. vailable packages Version Data acquisition Adam 13 0 0 140 en DataScan 7000 13 0 0 140 en DataScan Solo 13 0 0 140 en Demo driver 13 0 0 140 en instruNet 13 0 0 140 en 1Otech 13 0 0 140 en IVI 13 0 0 140 en Measurement Computing 13 0 0 140 en NuDAM 13 0 0 140 en Omega Engineering OMB OM 13 0 0 140 en NewnartiQmena NMR Enhanced 12 0 140 an x x x x x x Vv x x x at Package description Manufacturer National Instruments Ireland Resources Limited Release status Released Description Contains modules for the DAQ CAN and LIN Hardware from National Instruments The current version of the N DAQmx library must be installed For CAN and LIN you also must install CAN or the NIXNET driver Note You cannot install N DAQmx and NI DAQ together You can import packages which you receive from the manufacturers or which you download from the DASYLab website Packages contain for example all files for a driver or for a function extension or special worksheet collections You also can update packages because a package with a higher version number can replace the earlier package The DASYLab developer can also use the configurator to create his own packets Use the packet definition where you define files and the actions you need for the installation of your functions 4 2 dasylab com DASYLab DLL Driver DLL drivers have their own interface and can run parallel with other hardware drivers Apart from a few
92. you can select the greatest and the smallest measured value with a drag indicator Bar Graph Use the bar graph to display values of the connected data channels as bars triangles thermometers or as LEDs By default the bar graph starts at the smallest value on the scale For example if the value range is 10 to 10 you can set the start point to zero at the center of the value range Therefore you can see during the measurement whether the bar is in the positive or in the negative range If the upper limit is exceeded or the lower limit is undershot DASYLab displays this with color changes so that in the LED display for example red diodes light up in the upper limit range and blue diodes light up in the lower limit range 3 8 dasylab com DASYLab By default the bar graph displays the current value However like the digital meter or the analog meter the bar graph also can display the mean value the root mean square the minimum or the maximum of the current data block Status Display Use the status display to display states and not values By default the status display shows two states OFF the lamp is red and ON the lamp is green The threshold value is 1 5 You can increase the number of states if you display graphics instead of lamps To do so assign a graphic to every value range For example if you have three graphics of a valve the status display shows a closed valve in the range 0 to 1 a half open valve in the ran

DASYLab - Measurement Computing

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