Presentation is loading. Please wait.

Presentation is loading. Please wait.

Workshop 2 of 7 Welcome!. Today's Topics Review of Workshop 1 Basic VI Structure Arrays Clusters Error Cluster Enumerations.

Similar presentations


Presentation on theme: "Workshop 2 of 7 Welcome!. Today's Topics Review of Workshop 1 Basic VI Structure Arrays Clusters Error Cluster Enumerations."— Presentation transcript:

1 Workshop 2 of 7 Welcome!

2 Today's Topics Review of Workshop 1 Basic VI Structure Arrays Clusters Error Cluster Enumerations

3 Review Question 1 Which of the following are the three parts of a VI? a)Front Panel b)Project c)Block Diagram d)Connector Pane/Icon

4 Review Question 1 Which of the following are the three parts of a VI? a)Front Panel b)Project c)Block Diagram d)Connector Pane/Icon

5 Review Question 2 1.Which identifies the control or indicator on the block diagram? a)Caption b)Location c)Label d)Value

6 Review Question 2 1.Which identifies the control or indicator on the block diagram? a)Caption b)Location c)Label d)Value

7 Review Question 3 Which of the following are not a nodes? a)Terminals b)Structures (while loop, for loop) c)subVIs d)Wires e)Functions

8 Review Question 3 Which of the following are not a nodes? a)Terminals b)Structures (while loop, for loop, etc.) c)subVIs d)Wires e)Functions

9 Which function executes first: Add or Subtract? a)Add b)Subtract c)Unknown 9 Review Question 4

10 Which function executes first: Add or Subtract? a)Add b)Subtract c)Unknown 10 Review Question 4

11 Review Question 1 True or False? It is possible to add non-VI files to a LabVIEW Project.

12 Review Question 1 True or False? It is possible to add non-VI files to a LabVIEW Project. TRUE

13 Review Question 2 True or False? If I am using a virtual folder in the LabVIEW Project, I must keep all of the related files together on disk.

14 Review Question 2 True or False? If I am using a virtual folder in the LabVIEW Project, I must keep all of the related files together on disk. FALSE

15 Review Question 3 Which mechanical action causes a Boolean in the False state to change to True when you click it and stay True until you release it and LabVIEW has read the value (similar to how a button in Windows operates)? a)Switch Until Released b)Switch When Released c)Latch Until Released d)Latch When Released

16 Review Question 3 Which mechanical action causes a Boolean in the False state to change to True when you click it and stay True until you release it and LabVIEW has read the value (similar to how a button in Windows operates)? a)Switch Until Released b)Switch When Released c)Latch Until Released d)Latch When Released

17 Acquire Analyze Present Basic VI Structure

18  An array consists of elements and dimensions  Elements: data that make up the array  Dimension: the length, height, or depth of an array  (2 31 )–1 elements per dimension, memory permitting  1 or more dimensions Arrays Elements (numeric, here) Index, tells dimension (1D, here)

19 Arrays: the elements Arrays can be of many different data types, but only one data type at a time

20 Arrays: Initialized and Uninitialized If the elements of an array are grayed out, then those elements are uninitialized. Uninitialized elements do not have a value and are place holders Uninitialized elements Initialized elements

21 Arrays: Size vs. Dimension Size is the number of initialized elements in each dimension Dimension is how the elements are organized Size: 4 Dimension: 1D Size: 2x3x? Dimension: 3D Size: 0x0 Dimension: 2D Size: at least 4 – more elements could be hidden Dimension: 1D Size: 4 Dimension: 1D

22 Creating an Array 1.Place an array shell on the front panel From the Controls»Modern»Array, Matrix, and Cluster subpalette, select the Array icon. 2.Drag a data object or element into the array shell

23 Arrays: the index The index (zero-based) tells you : the dimension of the array (1D, 2D, 3D, etc.) the index of the element displayed in the upper left corner -the 1D array below is displaying index 1 to contain a value of 3.00; we do not know the value of index 0 from this image because the value at index 0 is hidden from view 1D Array (initialized) 2D Array (uninitialized) index TIP: drag the edge of the index to add another dimension to an array (row) (column)

24 Demonstration 1: Creating an array

25 -Array Size: -Returns the number of elements in each dimension of the array -Index Array: -Returns the value at the index you specify -Initialize Array: -Creates an initialized array of the dimension and data type you specify -Build Array: -Adds elements or dimensions to an array -Search 1D Array: -Returns the index of the value you specify; if not found, returns -1 Array Functions

26 Clusters group data elements of mixed types Similar to a record or a struct in text-based programming languages Clusters

27 Cluster Functions Bundle (there is also Unbundle) Assembles a cluster from individual elements. Bundle By Name (there is also Unbundle By Name) Replaces one or more cluster elements. This function refers to cluster elements by name instead of by their position in the cluster. Cluster Constant Use this constant to supply a constant cluster value to th e block diagram. (Terminal labels reflect data type) Bundle By Name Bundle Cluster Constant

28 Cluster elements have a logical order unrelated to their position in the shell You can view and modify the cluster order by right-clicking the cluster border and selecting Reorder Controls In Cluster from the shortcut menu Order determines how cluster is unbundled Clusters: Order

29 Three parts: Status – Boolean, TRUE when an error occurred Code - numeric (I32), identifies which error occurred Source – string, identifies where the error occurred Error Cluster Note: Warnings have a code and source, but the status is FALSE

30 Demonstration 2: Creating a cluster and reordering its element

31 Clusters differ from arrays in that they are a fixed size Clusters can contain mixed data types; arrays contain only one data type Like an array, a cluster is either a control or an indicator and cannot contain a mixture of controls and indicators You can create a cluster of clusters, cluster of arrays, array of clusters, but NOT an array of arrays Clusters vs. Arrays

32 Enumeration An enum represents a pair of values, a string and a numeric, where the enum’s value is one of a defined list of value pairs Appears as a string to you, and a number to computer

33 Enumeration: Configuring 1.Right-click on the enum 2.Select Edit Items…

34 Demonstration 3: Configuring an Enum

35 Customizing Controls LabVIEW ships with multiple palettes of controls available to you. However, you may want to customize them or create your own Standard LabVIEW Gauge Customized LabVIEW Gauge

36 Creating Custom Controls How to create: -Right click on the control; select Advanced >> Customize -The Control Edit window will appear. Edit Mode Customize Mode (low-level changes)

37 Saving Custom Controls Three options: -Custom Control -Type Definition -Strict Type Definition All 3 options create a *.ctl file. Once you save the custom control it takes on the name of the option you chose.

38 Custom Controls & Type Definitions Control No connection between the one you saved and the instance in the VI Update the file, but the instances are not updated Type Def Connection between the saved file and all instances Forces the data type of each instance to be identical (clusters, enum) Changes made to file will populate throughout each instance Strict Type Def Connection between saved file and all instances Forces everything about an instance to be identical to the strict type definition, except: label description default value *.ctl

39 Demonstration: Creating and Saving a Type Definition

40 Create a new VI from the instructions located at ni.com/mst CLAD Extra Questions (Put the answers in the message) Email HW to: Mst.labview@gmail.com Homework:


Download ppt "Workshop 2 of 7 Welcome!. Today's Topics Review of Workshop 1 Basic VI Structure Arrays Clusters Error Cluster Enumerations."

Similar presentations


Ads by Google