Course contents
1.
Labview basics
– virtual instruments, data flow, palettes
2.
Structures
– for, while, case, ...
– editing techniques
3.
Controls&Indicators
– arrays, clusters, charts, graphs
4.
Additional lecture
– State machines, SubVIs, MainCluster
5.
Modular programming + recording
– SubVIs
– File I/O
– Analysis
– Signal processing
– Communication between loops
6.
Instrument control
– DAQ , Data collection, GPIB, Serial
7.
Additional lecture
– Data Acquisition, Instrument control

Measurement & Automation Explorer
(MAX)
• View and control your devices and software

Create simulated device
• You can test your code without the hardware

Create simulated device
• Real devices are green
• Simulated devices are yellow
– simulated devices work just like real devices

Test panel

• Check pinouts
MAX

• Self Test
MAX

DAQ Assistant

• Create new task
– put express VI to block diagram
DAQ Assistant

DAQ Assistant

DAQ Assistant
• Define Task
– 1 sample

Acquire 1 sample with DAQ assistant

Acquire multiple samples from multiple channels

Acquire multiple samples from multiple channels
• N Samples

Acquire multiple samples from multiple channels
• You can sample within a loop

Acquire continuosly

Acquire continuosly

Create NI-DAQmx tasks from MAX

Define Task

Define Task
• Tasks are visible in all LabVIEW applications

• Input range
• Timing
• Terminal configuration
• Add channels
Task settings

Run task
• Simulated device will produce sine wave
• Press Save to save the task settings

Test simulated device on LabVIEW
• Hardware Input and Output»DAQmx»Analog
Measurements»Voltage»Cont Acq&Graph Voltage-Int Clk.VI

Test simulated device on LabVIEW

Create task from express VI

Generate code from express VI
• Express VI set to Continuos mode

Generate code from Task name constant

Generate code from Task name constant

Output voltages

• N samples
• Generate >> Example
Output Voltages

• 1 Sample
Digital input

• 1 Sample
• Generate >> Example
Digital input

• 1 Sample
Digital output

Triggered acquisition

Counter

NI DAQmx Help
• Start»Programs»National Instruments»NI-DAQ

Terms
• Physical channel - A terminal or pin at which you can measure or generate an analog or digital signal.
• Virtual channel - A collection of settings that can include a name, a physical channel, input terminal connections, the type of measurement or generation, and scaling information. In NI-DAQmx, virtual channels are integral to every measurement. You can configure virtual channels with the DAQ Assistant, which you can open from
Measurement & Automation Explorer (MAX) or your application software. You also can configure virtual channels with the NI-DAQmx API in your application program.
• Task - A collection of one or more virtual channels with timing, triggering, and other properties. Conceptually, a task represents a measurement or generation you want to perform. You can set up and save all of the configuration information in a task and use the task in an application. In NI-DAQmx, you can configure virtual channels as part of a task or separate from a task.
• Local channels - Virtual channels created inside a task.
• Global channels - Virtual channels defined outside a task. You can create global channels in MAX or in your application software. You can use global channels in any application or add them to a number of different tasks. If you modify a global channel, the change affects all tasks in which you reference that global channel. In most cases, it is simpler to use local channels.

Links
• DAQmx Simulated Devices
– http://zone.ni.com/devzone/cda/tut/p/id/3698
• DAQ Assistant and automatic code generation
– http://zone.ni.com/devzone/cda/tut/p/id/4656
• Useful DAQmx functions
– http://zone.ni.com/devzone/cda/tut/p/id/2835
• Continuous vs. Finite Sampling
– http://digital.ni.com/public.nsf/allkb/B86AA2D2FDE9A16086256FFC00
604202
• Read multiple channels sequentially (advanced)
– https://decibel.ni.com/content/docs/DOC-6901