DAQmx Digital IN for MultiSIM

[Duffy2007]

Overview

A very simple example to use a DAQmx Digital Input in MultiSIM. The internal frequency generator is

used to generate the sample frequency. for the digital inputs.

Steps to Implement or Execute Code

Unpack the archive to the Multisim installation directory. The table illustrates the files that will be copied to your harddrive.

Type	Name	Location	Application
Instrument	DAQmx_DI.llb	..\lvinstruments	Multisim
Example	DAQmx_DI_test.ms13	..\ samples\LabVIEW Instruments\DAQ	Multisim
Project	DAQmx_DI.lvproj	..\ samples\LabVIEW Instruments\DAQ	LabVIEW
Source	DAQmx_DI.llb	..\ samples\LabVIEW Instruments\DAQ	LabVIEW

Requirements

Software

LabVIEW 2013

MultiSIM 2013

DAQmx 9.7.5

Hardware

MultifunctionDAQCard, X-Series, M-Series

Instrument Features

The following describes the function of the various controls

• DAQ Lines(s) specifies the names of the physical channels from a particular DAQ device. Select channels from the drop down list (press STRG to select multiple entries) or enter lines string manually (e.g. Dev1/ai0:3).
• High Peak specify the maximum value you expect to give out as an digital high.
• Sampling Rate specifies the sampling rate in samples per channel per second.
• Recording Duration (s) specifies the amount of time a DAQ operation will read input data
  • #Data point = Recording Duration(s) * Sample Rate (Hz)
• Repeat Data? specifies if Multisim automatically repeats your acquired data. If you use periodic signals, it is recommended to only sample one period and check the Repeat Data? checkbox.
• Acquire Data will update the graph with a new set of input data.

How To Use This Instrument

If you are familiar with Dataacquisition from National Instrument, you will find it easy to use the DAQ Source instrument.

However, here are some simple steps we recommend to follow when using the DAQ Source for the first time.

1. Verify a NI DAQ device is connected to or plugged into your computer
2. Open Multisim and create your circuit
3. Add the DAQmx_DI to your schematic
   1. Access the DAQmx DI from the instrument toolbar
   2. Place it on your schematic
   3. Wire it to the desired net
4. Input real world data
   1. Double click the instrument symbol to open the interface
   2. Enter the channels you like to measure
   3. Set Lines, High Peak, Value, Sampling Rate and Recording Duration (s) to match your expected signal
   4. Press the Acquire Data control to get a new reading and update the graph
5. Start the simulation

[fanyfaga]

Hi,I want to know how a common user can add a custom LabVIEW Simulation, for example I want to use the NI DAQmx all function. In this case only show the digital function~

[Duffy2007]

Hello fanyfaga

you can look at this examples

Outputting Signals from a Multisim Simulation to a NI DAQ Device

Input Signals From NI DAQ Device To Drive Your SPICE Based Circuit

How to Create a LabVIEW Based Virtual Instrument for NI Multisim

Hope it helps.