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

MAX Check pinouts

MAX Self Test

DAQ Assistant

Create new task – put express VI to block diagram

DAQ Assistant

Define Task – 1 sample

Acquire 1 sample with DAQ assistant

Acquire multiple samples from multiple channels

N Samples

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

Acquire continuosly

Create NI-DAQmx tasks from MAX

Define Task

Tasks are visible in all LabVIEW applications

Task settings Input range Timing Terminal configuration Add channels

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

Output voltages

Output Voltages N samples Generate >> Example

Digital input 1 Sample

Digital input 1 Sample Generate >> Example

Digital output 1 Sample

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 – DAQ Assistant and automatic code generation – Useful DAQmx functions – Continuous vs. Finite Sampling – Read multiple channels sequentially (advanced) –