certified labview developer exam preparation coursesouthafrica.ni.com/sites/default/files/certified...
TRANSCRIPT
![Page 1: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/1.jpg)
ni.com
NI Training & Certification
Certified LabVIEW Developer
Exam Preparation Course
Jason Strydom
Application Engineer
National Instruments
![Page 2: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/2.jpg)
2 ni.com
Agenda
• CLD exam process, format and scoring
• CLD exam objective and theme
• Design your way to exam success
• Preparation resources and exam tips
• Questions
![Page 3: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/3.jpg)
3 ni.com
CLD Exam Logistics
• CLD Exam Process
• CLD Exam Grading
![Page 4: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/4.jpg)
4 ni.com
CLD Exam Process
• A PC with LabVIEW 2013 is provided
• Application development specification includes the following:
• Screen shot of Front Panel and the VI on USB Key
• Description of the controls and indicators
• General requirements
• Functional specifications of the application
• LabVIEW documentation, Express VIs and examples may be used
• No external resources permitted
• Time allowed for exam: 4 hours
![Page 5: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/5.jpg)
5 ni.com
CLD Exam Grading Criteria
Grading Criteria Points on Exam Percentage
Functionality 15 37.5%
Style 15 37.5%
Documentation 10 25%
Total Points 40 100%
Passing grade is 70 % or higher
![Page 6: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/6.jpg)
6 ni.com
CLD Exam: Objectives and Themes
• CLD Exam Objectives
• CLD Exam Themes
![Page 7: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/7.jpg)
7 ni.com
What skills does a CLD demonstrate?
• Problem solving skills
• LabVIEW competency
• Modular, scalable, and maintainable application design experience
• Consistent documentation
• Moderate development (wiring) speed
• Debugging and testing
![Page 8: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/8.jpg)
8 ni.com
CLD Exam Theme
• Exams are based on a sequencer type application
• Step order is configurable via an input file or user interface
• Timing is an essential aspect of the application
• Output or log file may be required
• Application must respond to user interface activity within 100 ms
![Page 9: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/9.jpg)
9 ni.com
CLD Exam Theme Scenario – Sequencer
Step 1 Execute: x secs
Step 2 Execute: y secs
Step 3 Execute: z secs
Start
Program design should be scalable to adapt to additional steps
![Page 10: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/10.jpg)
10 ni.com
CLD Exam Theme Scenario – Sequencer
Wait for m secs
Wait for n secs
Wait f
or
k s
ecs
Program design should be scalable to adapt to additional steps
Step 1 Execute: x secs
Step 2 Execute: y secs
Step 3 Execute: z secs
Start
![Page 11: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/11.jpg)
11 ni.com
CLD Exam Theme Scenario – Sequencer
Step 1 Execute: x secs
Step 2 Execute: y secs
Step 3 Execute: z secs
Start
Step 2,10,2 Step 3,4,3 Step 1,6,5
*.csv / *.ini
Wait for m secs
Wait for n secs
Wait f
or
k s
ecs
![Page 12: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/12.jpg)
12 ni.com
CLD Exam Design
• Design Patterns
• Timing Methods
• Development Style
• Documentation
• Error Handling
![Page 13: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/13.jpg)
13 ni.com
Design Patterns for CLD Applications
Design Pattern Advantage Disadvantage
State machine • Handles sequence control
• Cannot handle storing of sequences
• May not be responsive enough to user
interface events
![Page 14: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/14.jpg)
14 ni.com
State Machine Design Pattern
![Page 15: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/15.jpg)
15 ni.com
Design Patterns for CLD Applications
Design Pattern Advantage Disadvantage
State machine • Handles sequence control
• Cannot handle storing of sequences
• May not be responsive enough to user
interface events
Queue based user
interface Event
Handler
• Extends state machine to
store sequences
• Handles user interface
events
• Does not allow intensive event or
sequence processing
• User interface events need to be
controlled by limiting access to front
panel controls
![Page 16: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/16.jpg)
16 ni.com
Queue Based UI Event Handler Design Pattern
![Page 17: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/17.jpg)
17 ni.com
Design Patterns for CLD Applications
Design Pattern Advantage Disadvantage
State machine • Handles sequence control
• Cannot handle storing of sequences
• May not be responsive enough to user
interface events
Queue based UI
Event Handler
• Extends state machine to
store sequences
• Handles user interface
events
• Does not allow intensive event or
sequence processing
• User interface events need to be
controlled by limiting access to FP
controls
Producer /
Consumer with
Events
• Responsive to user
interface events
• Allows intensive event and
sequence processing
• Does not integrate non-user interface
events well
![Page 18: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/18.jpg)
18 ni.com
Producer / Consumer Design Pattern
![Page 19: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/19.jpg)
19 ni.com
CLD Exam Design
1. Design Patterns
2. Timing Methods
3. Development Style
4. Documentation
5. Error Handling
![Page 20: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/20.jpg)
20 ni.com
Timing Methods for CLD Applications
o Execution timing control allows us to regulate how quickly a loop executes on the processor
Timing Type Timing Method Applications
Execution timing control
Wait (ms) Wait Until Next (ms) multiple
Regulate execution of state machine loop to allow other programs to run on the computer
![Page 21: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/21.jpg)
21 ni.com
Execution Timing Control
![Page 22: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/22.jpg)
22 ni.com
Timing Methods for CLD Applications
o Software timing control allows us to time a real-world operation to perform for a set time period.
Timing Type Timing Method Applications
Software timing control
Get Date/Time in sec. Tick Count
Good general purpose timing method for timing a sequence operation. Encapsulate in functional global or SubVI
![Page 23: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/23.jpg)
23 ni.com
Software Timing Control: Functional Global
Functional Global Using Get/Date Time In secs function
![Page 24: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/24.jpg)
24 ni.com
Timing Methods for CLD Applications
Timing Type Timing Method Applications
Software timing control
Get Date/Time in sec. Tick Count
Good general purpose timing method for timing a sequence operation. Encapsulate in functional global or SubVI
Express Elapsed time VI
Measures Elapsed time with stop / reset control functions. Ready made solution !!
Other useful Software timing control methods: • Event Case Timeout – Useful to stop an operation if no user activity is detected • Synchronization VI Timeout - Useful for executing an operation at specific time periods
![Page 25: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/25.jpg)
25 ni.com
Software Timing Control: Elapsed Time Express VI
Elapsed Time Express VI
This is a subVI from the Car Wash sample exam
![Page 26: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/26.jpg)
26 ni.com
CLD Exam Design
1. Design Patterns
2. Timing Methods
3. Development Style
4. Documentation
5. Error Handling
![Page 27: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/27.jpg)
27 ni.com
CLD Application Style Small things that make a Big Difference !!
• Avoid the use of local variables when you can use a wire
• Use property nodes to modify control attributes and control values but not indicator values
• Type-define reused enums and data structures
• Close references if opened explicitly
• Avoid data coercion and default tunnels
• Avoid copies of code - Develop SubVI if code is reused
• Create readable block diagram • Avoid unnecessary bends, overlapping objects, wires
![Page 28: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/28.jpg)
28 ni.com
Documenting CLD Applications Documentation Example
Label wires to identify their use
Label constants
Description and tool tips for UI controls
Block diagram comments
VI / SubVI Properties » Documentation
Tip: Brevity !!
![Page 29: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/29.jpg)
29 ni.com
CLD Exam Design
1. Design Patterns
2. Timing Methods
3. Development Style
4. Documentation
5. Error Handling
![Page 30: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/30.jpg)
30 ni.com
Error Handling in CLD Applications
Stop VI on error when specified
![Page 31: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/31.jpg)
31 ni.com
CLD Exam: Preparation
1. Preparation Resources
2. Effective Exam Preparation
3. Exam taking tips
![Page 32: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/32.jpg)
32 ni.com
Preparation Resources
• Browse to southafrica.ni.com
• Enter CLD in the search
• Click on resulting link:
• On the CLD page, click on the following link (bottom):
![Page 33: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/33.jpg)
33 ni.com
Tips for Exam Preparation
• Test yourself: • Time yourself through the sample exams
• Evaluate your solutions using the Exam Preparation Guide and the evaluation criteria given at the end of the guide
• Do better: • Incorporate best practices in all your LabVIEW projects
• Use the generic sequencer model to develop new scenarios
• Improve your coding speed – use Quick Drop!
• Find optimal ways to solve problems in LabVIEW
![Page 34: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/34.jpg)
34 ni.com
Tips for Exam
• Take a few minutes to plan your application • Decide on the best main VI architecture for the application
• Decide which modules / SubVIs you will need to create
• Decide on the timing method
• Focus on getting most of the core functionality working
• Document the VI and SubVIs
• Clean up block diagram towards the end
• Pace yourself…Time passes quickly when you are having fun!!
![Page 35: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/35.jpg)
35 ni.com
What happens after the exam?
• Exam proctor transmit exam project to NI for evaluation
• Candidates receive results in 4 weeks • Exams are evaluated by two engineers
• Successful candidates receive logos and certificate by mail • CLDs must recertify every two years or certify as CLA
• Unsuccessful candidates can improve on the feedback given on the evaluation sheet
• Re-attempt the exam when prepared
![Page 36: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/36.jpg)
36 ni.com
Additional Resources
• Darren Nattinger’s practical tips on CLD readiness • http://labviewartisan.blogspot.com/2009/01/labview-certification-
preparing-for-cld.html
• Re-watch the CLD Prep class online • http://www.youtube.com/watch?v=f8vpHkvhOyQ
• Email [email protected]
![Page 37: Certified LabVIEW Developer Exam Preparation Coursesouthafrica.ni.com/sites/default/files/Certified LabVIEW Developer... · Certified LabVIEW Developer Exam Preparation Course](https://reader034.vdocuments.us/reader034/viewer/2022052121/5b543a077f8b9a575f8cbaa3/html5/thumbnails/37.jpg)
ni.com
Questions?