NI Multisim for Education

NI Multisim for Education
NI Multisim
for Education
NI Multisim for Education
January 2012
374484G-01
TM
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Conventions
The following conventions are used in this manual:
»
The » symbol leads you through nested menu items and dialog box options
to a final action. The sequence Tools»Clear ERC Markers»Entire design
directs you to pull down the Tools menu, select the Clear ERC Markers
item, and select Entire design from the resulting dialog box.
This icon denotes a tip, which alerts you to advisory information.
This icon denotes a note, which alerts you to important information.
This icon denotes a caution, which advises you of precautions to take to
avoid injury, data loss, or a system crash.
bold
Bold text denotes items that you must select or click in the software, such
as menu items and dialog box options. Bold text also denotes parameter
names.
italic
Italic text denotes variables, emphasis, a cross-reference, or an introduction
to a key concept. Italic text also denotes text that is a placeholder for a word
or value that you must supply.
monospace
Text in this font denotes text or characters that you should enter from the
keyboard, sections of code, programming examples, and syntax examples.
This font is also used for the proper names of disk drives, paths, directories,
programs, subprograms, subroutines, device names, functions, operations,
variables, filenames, and extensions.
Contents
Chapter 1
Educators’ Guide
Design Creator’s Name..................................................................................................1-1
Using Restrictions..........................................................................................................1-2
Setting Global Restrictions..............................................................................1-2
General Global Restrictions ..............................................................1-3
Simplified Version..............................................................1-4
Global Analyses Restrictions ............................................................1-4
Setting Circuit Restrictions..............................................................................1-5
Setting Passwords for Restrictions ..................................................................1-7
Link to Education Resources .........................................................................................1-8
Chapter 2
Breadboarding
Breadboarding Overview ...............................................................................................2-1
Breadboard Settings .......................................................................................................2-2
3D Options .....................................................................................................................2-3
Placing Components on the Breadboard........................................................................2-4
Appearance of 3D Components.......................................................................2-8
Wiring Placed Components ...........................................................................................2-8
Placing a Jumper..............................................................................................2-9
Changing Jumper Wire Color..........................................................................2-10
Viewing Component Information ..................................................................................2-11
Two-terminal Components..............................................................................2-12
Manipulating the Breadboard View...............................................................................2-13
Breadboard Netlist dialog box .......................................................................................2-14
DRC and Connectivity Check........................................................................................2-15
Chapter 3
Virtual NI ELVIS and NI myDAQ
Overview........................................................................................................................3-1
The Virtual NI ELVIS I Schematic ...............................................................................3-1
NI ELVIS I Instruments ..................................................................................3-5
Oscilloscope ......................................................................................3-6
IV Analyzer and Multimeter .............................................................3-7
Function Generator ...........................................................................3-9
Power Supplies..................................................................................3-10
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The Virtual NI ELVIS II Schematic.............................................................................. 3-10
Enabling NI ELVIS II Schematic Instruments for Simulation ....................... 3-14
NI ELVIS II Instruments................................................................................. 3-15
Oscilloscope...................................................................................... 3-16
Dynamic Signal Analyzer................................................................. 3-17
Bode Analyzer .................................................................................. 3-19
Digital Multimeter ............................................................................ 3-20
Arbitrary Waveform Generator ........................................................ 3-21
Function Generator ........................................................................... 3-23
Variable Power Supply ..................................................................... 3-25
Digital Reader................................................................................... 3-27
Digital Writer.................................................................................... 3-29
NI ELVISmx Instruments Toolbar ................................................... 3-30
NI ELVIS Prototyping Boards ...................................................................................... 3-31
Wiring Placed Components in 3D Mode ........................................................ 3-37
Virtual NI myDAQ........................................................................................................ 3-38
Enabling NI myDAQ Schematic Instruments for Simulation ........................ 3-40
NI ELVISmx Instruments in Virtual NI myDAQ........................................... 3-41
Digital Reader................................................................................... 3-42
Digital Writer.................................................................................... 3-43
Oscilloscope...................................................................................... 3-45
Dynamic Signal Analyzer................................................................. 3-47
Bode Analyzer .................................................................................. 3-49
Arbitrary Waveform Generator ........................................................ 3-51
Function Generator ........................................................................... 3-53
Digital Multimeter ............................................................................ 3-54
Virtual NI myDAQ Designs in the Breadboard View .................................... 3-55
Chapter 4
PLD Schematics
Overview ....................................................................................................................... 4-1
Components .................................................................................................... 4-2
Port Connectors............................................................................................... 4-2
PLD Toolbar ................................................................................................... 4-4
PLD Components Toolbar .............................................................................. 4-5
Creating a PLD Schematic ............................................................................................ 4-7
Standard PLD Configuration File ................................................................... 4-9
Subcircuits and Hierarchical Blocks ............................................................... 4-9
Placing PLDs as Subcircuits and Hierarchical Blocks ..................... 4-11
Placing a New PLD as a Subcircuit ................................... 4-11
Placing a New PLD as a Hierarchical Block...................... 4-12
Placing a New PLD Subcircuit in a PLD Schematic ......... 4-12
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Placing a New PLD Hierarchical Block in a
PLD Schematic ................................................................4-12
Placing an Existing PLD Schematic as a
Hierarchical Block in a PLD Schematic ..........................4-13
Adding Components to a PLD Schematic.......................................................4-13
Adding Port Connectors to a PLD Schematic .................................................4-13
Port Connector Dialog Box .............................................................................4-14
PLD Settings Dialog Box ..............................................................................................4-15
Port Connectors Tab ........................................................................................4-15
Add Defined Connector dialog box ..................................................4-16
General Tab .....................................................................................................4-17
Exporting to PLD...........................................................................................................4-19
PLD Export Dialog Box ..................................................................................4-19
Programming a Connected PLD Device...........................................4-20
Generating a PLD Programming File ...............................................4-22
Generating VHDL Files ....................................................................4-23
Export PLD to VHDL Dialog Box..................................................................4-24
Running a Topology Check.............................................................................4-26
Editing a Component’s VHDL Export Data ...................................................4-27
Enabling Programming for Unsupported PLDs.............................................................4-28
Custom PLD Configuration Files....................................................................4-28
Creating a Custom PLD Configuration File in Another Application..............4-29
Chapter 5
Ladder Diagrams
Overview........................................................................................................................5-1
Creating a Ladder Diagram............................................................................................5-1
AND Rungs and OR Rungs ...........................................................................................5-7
Sample Designs..............................................................................................................5-10
Holding Tank...................................................................................................5-10
Conveyor Belt..................................................................................................5-17
Traffic Light ....................................................................................................5-23
Appendix A
Technical Support and Professional Services
Index
© National Instruments Corporation
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1
Educators’ Guide
Multisim is the schematic capture and simulation application of National
Instruments Circuit Design Suite, a suite of EDA (Electronics Design
Automation) tools that assists you in carrying out the major steps in the
circuit design flow. Multisim is designed for schematic entry, simulation,
and feeding to downstage steps, such as PCB layout.
In addition to the professional features that are detailed in the Multisim
Help, there are a number of education-specific features that are outlined in
this manual.
This chapter describes the tools that Multisim offers to let you exercise
greater control over the program’s interface and functionality when sharing
designs with students, as well as to set certain aspects of a design’s behavior
for instructional purposes.
Some of the described features may not be available in your edition of
Multisim. Refer to the NI Circuit Design Suite Release Notes for a
description of the features available in your edition.
Design Creator’s Name
Multisim provides a feature by which the name of the creator of each design
is stored with that design. Educators can take advantage of this feature to
identify the student who, for example, created the design being submitted
as the answer to an assignment (provided that the student uses his/her own
copy of the program to create the design). The name appears in the
Circuit Restrictions dialog box, which you can view as long as no
passwords have been set. Refer to the Setting Circuit Restrictions section
for more information.
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Using Restrictions
Restrictions are useful in a number of ways:
•
when you are designing circuits for demonstration purposes and want
to limit the functionality available to students.
•
when you are sharing designs with students and want:
–
to prevent them from being able to edit the design in any way.
–
to limit the types of modifications they can make to a design.
–
to limit the types of analyses they can perform on it.
–
to limit the information they can see about certain parts of the
design (for example, the value of a resistor you want them to
calculate).
You can set global-level restrictions, which become default Multisim
settings, or circuit-level restrictions, which affect only specific designs.
To ensure that only you can set or modify restrictions, you can use
passwords which can protect both global and circuit restrictions. It is
important that you set passwords immediately when using restrictions that
you want to keep secure against any modification by students. The
password for global restrictions is encrypted and stored in the Multisim
program file. The password for circuit restrictions (for restricting only a
particular design) is encrypted and stored in the design file.
Setting Global Restrictions
Use global restrictions to set the basic level of functionality of Multisim
available to students in all designs with which they will work. You can
select a default path where designs are to be saved, hide databases and the
In Use List, and determine whether students may edit components or place
instruments.
You can also hide complicated instruments and analysis options from the
menus by using the simplified version. Refer to the Simplified Version
section for more information.
Note Global restrictions are overridden by circuit restrictions if the circuit restrictions are
saved with the design. Refer to the Setting Circuit Restrictions section for more
information.
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General Global Restrictions
Complete the following steps to set general global restrictions:
1.
Choose Options»Global restrictions. The Password dialog box
appears.
Note The Password dialog also appears if you select Options»Circuit restrictions, if
you have previously set a password by clicking Password from the Circuit Restrictions
dialog box. Refer to the Setting Circuit Restrictions section for information about the
Circuit Restrictions dialog box.
2.
Enter the default password “Rodney” (this is case sensitive) and click
OK. The Global Restrictions dialog box appears.
Note You should change the default password. Refer to the Setting Passwords for
Restrictions section for more information.
3.
Click the General tab.
4.
Set the default path and location where students find and save files in
the Design Path field.
5.
Set the following as desired in the Toolbars box:
6.
7.
© National Instruments Corporation
•
Disable Instruments toolbar—Makes instruments unavailable to
be placed in the design.
•
Disable In-Use List toolbar—Hides the In Use List.
Set the following as desired in the Databases box:
•
Disable database editing—Ensures that students cannot edit
components in the database.
•
Disable Master database component access—Hides the
Multisim Master database and component groups and families
from the interface.
•
Disable Corporate database component access—Hides the
corporate database and component groups and families from the
interface.
•
Disable User database component access—Hides the “user”
database and component groups and families from the interface.
Click OK. Your options are immediately set for all designs, unless you
have set circuit restrictions. Refer to the Setting Circuit Restrictions
section for more information.
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Simplified Version
The simplified version restricts students to only certain instruments and
analyses. The simplified version can also be locked, preventing students
from turning it off with Options»Simplified version and having access to
all analyses and instruments.
Complete the following steps to set up the simplified version:
1.
Display the General tab of the Global Restrictions dialog box.
2.
Set your options by enabling one of the following options:
3.
•
Lock simplified—Disables the Options»Simplified version
menu option.
•
Simplified version—Changes the interface display by hiding the
more complex functions and restricting the available instruments
and analyses. If the simplified version is restricted, it will be
greyed out in the Options menu.
•
Full version—Displays the full default interface without
restrictions.
Click OK.
Your options are immediately set for all designs, unless you have set circuit
restrictions. Refer to the Setting Circuit Restrictions section for more
information.
Global Analyses Restrictions
Complete the following steps to set global analyses restrictions:
Note
1.
From the Global Restrictions dialog box, click the Analysis tab.
2.
Enable the desired analyses by selecting their checkboxes and click
OK. Only the analyses you check will be enabled in the Simulate»
Analyses menu or when the student clicks the Grapher/Analyses List
button in the Main toolbar.
Refer to the Analysis section of the Multisim Help for more information on analyses.
These options are immediately set for all designs, unless you have set
circuit restrictions. Refer to the Setting Circuit Restrictions section for
more information.
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Chapter 1
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Setting Circuit Restrictions
Use circuit restrictions to set restrictions on individual designs. Circuit
restrictions override global restrictions. They are saved with your design
and invoked each time the design is loaded. In addition to hiding databases
and setting available analyses, you can set a schematic to be read-only (not
editable by students), you can hide components’ values, faults and uses in
analyses, and you can lock subcircuits to make them unavailable for
opening by students.
Note Remember that circuit restrictions only apply to the current design; when you create
a new design, only the global restrictions will apply. Refer to the Setting Global
Restrictions section for more information. If you want circuit restrictions to apply to a new
design, you will need to reset those restrictions each time you create a new design.
Complete the following steps to set general circuit restrictions:
1.
Choose Options»Circuit restrictions. If you have created a password,
you will be prompted for it. Refer to the Setting Passwords for
Restrictions section for more information. Enter your password in the
Password dialog box, and click OK. The Circuit Restrictions dialog
box appears.
2.
Click the General tab and set the desired options by enabling the
appropriate checkboxes. Select from the following options:
© National Instruments Corporation
•
Schematic read-only—Prevents students from saving the design,
and hides components bins. Students will only be able to draw
wires between instruments and an open pin on an existing
connector. Also, they can only remove wires that are between an
instrument and a connector.
•
Description read-only—Prevents students from changing the
contents of the Description Box.
•
Hide component values—Marks the Values tab of components’
properties dialog boxes with an “X” and hides values. You may
wish to provide false values using labels.
•
Hide component faults—Marks the Faults tab of components’
properties dialog boxes with an “X”, and hides faults.
•
Lock subcircuits—Prevents students from opening subcircuits
and and hierarchical blocks and seeing their contents. Students
must measure the input and output of a hidden subsheet to
determine its contents.
•
Disable Instruments toolbar—Makes instruments unavailable to
be placed on the design.
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Note
•
Disable In-Use List toolbar—Disables the In-Use List for the
current design.
•
Disable Master database component access—Hides the
Multisim Master database and components groups and families
from the current design.
•
Disable Corporate database component access—Hides the
corporate database and components groups and families from the
interface.
•
Disable User database component access—Hides the user
database and components groups and families from the current
design.
The Design creator name is taken from the operating system.
3.
Click OK. The options you select are immediately invoked in the
design.
4.
To have the restrictions apply each time the design is opened, choose
File»Save to save the restrictions in the design file.
Complete the following steps to set design analyses restrictions:
Note
1.
From the Circuit Restrictions dialog box, click the Analysis tab.
2.
Enable the desired analyses by selecting their checkboxes and click
OK. Only the analyses you check will be enabled in the
Simulate»Analyses menu or when the student clicks the
Grapher/Analyses List button in the Main toolbar.
Refer to the Analysis section in the Multisim Help for more information on analyses.
3.
NI Multisim for Education
To have these analyses apply each time the design is opened, choose
File»Save to save the restrictions.
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Chapter 1
Educators’ Guide
Complete the following steps to set design breadboard restrictions:
1.
From the Circuit Restrictions dialog box, click the Breadboard tab.
2.
Set the following as desired:
3.
Note
•
Highlight target holes—Disable if you do not wish to see where
the targets for jumper wires are when placing them on the
breadboard.
•
Completion feedback—Disable if you do not wish components
and wires on the schematic to change color as they are placed and
wired on the breadboard.
Click OK.
For details on breadboarding, refer to Chapter 2, Breadboarding.
Setting Passwords for Restrictions
When using restrictions, you should create a password immediately to
ensure that your settings are secure.
Complete the following steps to create/change a password:
1.
For global restrictions, choose Options»Global restrictions.
Or
For circuit restrictions, choose Options»Circuit restrictions.
2.
Enter a password if prompted to do so.
The default password for global restrictions is “Rodney” (this is case sensitive).
Circuit restrictions do not have a default password.
Note
3.
From the restrictions dialog box that appears, click Password. The
Change Password dialog box appears.
4.
If you are choosing a password for the first time, leave the Old
password field blank.
5.
If you are changing a password, enter the old password in the Old
password field.
6.
Enter your (new) password in the New password field.
7.
Confirm your new password by entering it again in the Confirm
password field.
8.
Click OK.
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If you want to change global or circuit restrictions, you will need to enter the
respective password. Be sure to keep your passwords for both the Global restrictions and
Circuit restrictions dialogs written down and in a safe place, as you will not be able to
retrieve them from the program or design files, where they are stored in encrypted form.
Note
A design password is not automatically transferred to a new design when you go to
set circuit restrictions for it, so you will need to recreate the password every time you create
circuit restrictions that you want to keep secure.
Note
Link to Education Resources
This function is hidden when the simplified version option is selected. Refer to the
Simplified Version section for more information.
Note
To go to the National Instruments Academic website, click the Education
web site button or select Tools»Education web site.
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2
Breadboarding
This chapter describes Multisim’s breadboarding feature.
Some of the described features may not be available in your edition of
Multisim. Refer to the NI Circuit Design Suite Release Notes for a
description of the features available in your edition.
Breadboarding Overview
The Breadboarding feature provides a technical aid for educators who
wish to illustrate breadboarding as a means of prototyping designs. It also
gives students exposure to the breadboarding process, and shows in 3D
what the resulting breadboard will look like when completed.
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Chapter 2
Breadboarding
Breadboard Settings
The default breadboard is shown in the screen capture below. If you wish
to change the default settings, use the following procedure.
Complete the following steps to change the breadboard’s settings:
1.
Select Tools»View breadboard from the main Multisim menu. The
Breadboard View displays. The default breadboard appears as shown
below.
5
4
1
1
2
3
2
One Slat with 2 Rows
Left Strip
3
4
Bottom Strip
Right Strip
5
Top Strip
As shown in the figure above, the default breadboard contains: one slat
with two rows (1); one left strip (2); one bottom strip (3); one right strip
(4); one top strip (5).
NI Multisim for Education
2.
Select Options»Breadboard settings to display the Breadboard
Settings dialog box.
3.
Enter the desired parameters for the breadboard:
•
Number of slats—The number of slats to appear on the
breadboard.
•
Rows in a slat—The number of rows in each slat.
•
Top strip checkbox—Select to include a top strip on the
breadboard.
•
Bottom strip checkbox—Select to include a bottom strip on the
breadboard.
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Note
Breadboarding
•
Left strip checkbox—Select to include a left strip on the
breadboard.
•
Right strip checkbox—Select to include a right strip on the
breadboard.
Refer to the figure in step 1 for an illustration of the above parts of the breadboard.
4.
Click OK. The view of the breadboard changes to reflect your settings.
3D Options
The 3D viewing options for the Breadboard View are set in the 3D
Options tab of the Global Preferences dialog box.
Complete the following steps to change the 3D options:
1.
Select Options»Global preferences and click on the 3D Options tab.
2.
Optionally, click on Background color to display a standard Color
dialog box where you can adjust the background color as desired.
3.
In the Info box area:
•
Info box—Disable this checkbox if you do not wish to see the box
at the top of the Breadboard View that shows components
information.
•
Left—Select to place the components information box at the
top-left of the Breadboard View.
•
Center—Select to place the components information box at the
top-center of the Breadboard View.
•
Right—Select to place the components information box at the
top-right of the Breadboard View.
4.
Disable the Show target holes checkbox if you do not wish to see
where the targets for jumper wires are when placing them. Refer to the
Placing a Jumper section for more information.
5.
Disable the Show completion feedback checkbox if you do not wish
components and wires on the schematic to change color as they are
placed and wired on the breadboard.
6.
In the 3D performance box:
© National Instruments Corporation
•
Move the slider as desired to improve graphic performance. More
Details cause a slower screen refresh rate.
•
Enable the User Defined checkbox and disable the 3D features
that you do not wish to see (Show Breadboard Numbers, Show
Lights, Show Reflections, Show Transparent Indicators).
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Breadboarding
Tip
Disabling Show Breadboard Numbers will result in a much quicker refresh rate.
Placing Components on the Breadboard
Complete the following steps to place components on a breadboard:
1.
Create a schematic diagram of the desired design in the usual manner.
2.
Select Tools»Show breadboard from the main Multisim menu. The
Breadboard View displays similar to the following example.
1
2
2
3
1
2
Hover cursor over component to see description
Click arrows to view other components
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3
2-4
Place Component Bar contains components
waiting to be placed on breadboard.
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Chapter 2
3.
Breadboarding
Click on a component in the Place Component Bar and drag it to the
desired location on the breadboard. As the component passes over the
breadboard, sockets change color as shown below.
Red sockets (1) indicate where the component’s pins will be placed
when the mouse button is released. All of the sockets labelled (2) are
connected. Green indicates sockets that are internally connected to the
red socket in the same row on the breadboard.
1
2
1
Socket where pin will be placed
2
Internally connected sockets
Tip Select <Ctrl-R> to rotate a selected component 90 degrees clockwise or
<Ctrl-Shift-R> to rotate it 90 degrees counter-clockwise.
© National Instruments Corporation
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4.
Release the mouse button to place the component. Notice that the
colored (red and green) sockets on the breadboard no longer appear.
5.
Return to the schematic view and note that the color of the placed
component has changed as shown in the example below (R1).
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6.
Breadboarding
Continue placing the design’s components on the breadboard. When
all the components have been placed, the Place Component Bar
collapses as shown below (1).
1
1
Collapsed Place Component Bar
Where pins of components are connected on the schematic, you can place them in
connected sockets on the breadboard as shown below. This technique can reduce the
number of jumper wires required. Refer to the Placing a Jumper section for more
information about jumpers.
Tip
1
1
© National Instruments Corporation
Connected pins
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Appearance of 3D Components
The appearance of the 3D component is dependant on the footprint that is
selected from the Select a Component browser during schematic capture
in the Footprint manufacturer/type list.
Some virtual components have a default 3D view that appears as a blue 3D
rectangle or cube. “Real” components that have pin pitch (spacing) that
does not fit the pin pitch on the breadboard will also appear as 3D
rectangles or cubes, with properly spaced pins.
1
2
3
1
2
Pin pitch matches breadboard
Pin pitch does not match breadboard
3
Virtual component
Notes Certain virtual components, including 3D components, also appear as 3D
rectangles or cubes.
To view footprint information, hover the cursor over the desired component. Refer to the
Viewing Component Information section for more information.
Wiring Placed Components
By placing component pins that are connected on the schematic into
sockets that are internally connected, much of the “wiring” can be done at
the same time components are placed. However, in most designs, it will
also be necessary to place jumpers to complete the wiring of the placed
components.
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Placing a Jumper
Complete the following steps to place a jumper wire:
1.
Click on a socket connected to the pin where you wish to start the
jumper and begin moving the cursor. Legitimate “target” pins display
as shown below (1).
1
1
2.
© National Instruments Corporation
Target pins
Click to place the jumper in the desired socket.
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Breadboarding
3.
Return to the schematic view and note that the color of the wire
connecting the two pins has changed to green to indicate a connection
has been made, as shown in the figure below, between pin 2 of U2, and
pin 1 of U3.
Note If a net contains more than two connections, all must be connected before any of the
wires in the net change color.
4.
Continue placing jumpers until all schematic connections have been
made.
Tip Run a Design Rules Check and Connectivity Check to see if there are any errors in
your breadboard. Refer to the DRC and Connectivity Check section for more information.
Changing Jumper Wire Color
Complete the following steps to change jumper wire color:
1.
Select Edit»Breadboard wire color.
2.
Select the desired color from the Colors dialog box that appears.
Note The color of previously placed wires is not affected. The new color will be applied
to any subsequently placed wires.
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Viewing Component Information
Complete the following steps to view information about a specific
component:
1.
Hover the cursor over the component. The information box is
populated as shown below.
Complete the following steps to see pin information:
1.
Note
Hover the cursor over the “metal” part of the desired pin. The
information box now includes the pin name and the schematic net to
which the pin should be connected.
This only works for placed components.
© National Instruments Corporation
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Two-terminal Components
Two-terminal non-directional components like resistors have symbol pin
names (1 and 2) that automatically swap if they are connected the “wrong
way” according to the pin name that is on the schematic.
Complete the following steps to view the pin names for all devices on the
schematic:
NI Multisim for Education
1.
Select Options»Sheet properties and click the Sheet tab of the Sheet
Properties dialog box.
2.
Click the Symbol pin names checkbox until the checkbox contains a
checkmark instead of a solid color.
3.
Click OK to close the dialog.
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In the example below, (1) shows pin 1 of R1 on the schematic, and pin 1 of
R1 on the breadboard (2). If Pin 1 is connected to a pin that should be
connected to Pin 2, the pin names automatically swap. (Pin 1 becomes Pin 2
and vice versa).
1
2
2
1
Pin 1 of R1 on schematic
2
Pin 1 of R1 on breadboard
Manipulating the Breadboard View
You can manipulate the view of the breadboard in a number of ways.
To make the breadboard appear larger, select View»Zoom in.
To make the breadboard appear smaller, select View»Zoom out.
Tip Use your mouse’s center wheel to zoom in or out. (This must be set up in the General
tab of the Global Preferences dialog box. For details, refer to the Multisim Help.)
To view the entire breadboard, select View»Zoom full.
To rotate the breadboard 180 degrees, select View»Rotate view 180o.
Or
Press <Shift-R> on your keyboard.
© National Instruments Corporation
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Rotate the breadboard in any direction by dragging the mouse from a blank area of
the Breadboard View.
Tip
To pan the breadboard, press <Shift> and use any of the arrow keys.
Or
Press <Ctrl-Shift> and drag the mouse.
Or
Hold down your mouse-wheel and drag the mouse.
Breadboard Netlist dialog box
Complete the following steps to display a netlist for the placed components
and jumpers:
1.
Select Tools»Show breadboard netlist. The Breadboard Netlist
dialog box appears.
1
2
1
RefDes
2
Pin name
Chapter 2
2.
Breadboarding
Optionally, click Save to save the breadboard netlist as a .txt or .csv
file.
These nets are breadboard connections, and are not necessarily numbered in
correspondence to the schematic nets.
Note
DRC and Connectivity Check
You can run a Design Rules and Connectivity Check to see if there are
any errors on your breadboard.
To run a DRC and Connectivity Check, select Tools»DRC and
connectivity check. The results appear in the Results tab of the
Spreadsheet View.
Design Rule Errors—Indicate connections that are on the breadboard that
are not on the schematic.
Connectivity Errors—Indicate component pins that are connected to
schematic nets whose connections are not all completed.
© National Instruments Corporation
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3
Virtual NI ELVIS and NI myDAQ
This chapter describes Multisim’s virtual NI ELVIS feature.
Some of the described features may not be available in your edition of
Multisim. Refer to the NI Circuit Design Suite Release Notes for a
description of the features available in your edition.
Overview
Virtual NI ELVIS emulates much of the behavior of its real-world
counter-part, the NI Educational Laboratory Virtual Instrumentation Suite
(NI ELVIS). Planning, prototyping and testing of instructors’ projects can
be carried out on students’ PCs before moving on to the real NI ELVIS I or
NI ELVIS II workstation in the lab.
Multisim emulates the original NI ELVIS I and NI ELVIS II. NI ELVIS II
contans more instruments than the original. However, you should use
whichever version you have in your lab. For details, refer to
The Virtual NI ELVIS I Schematic and The Virtual NI ELVIS II Schematic
sections.
The Virtual NI ELVIS I Schematic
A virtual NI ELVIS I schematic contains a number of items that correspond
to elements of the real-world NI ELVIS workstation. The connection and
control of these elements is described in this section.
Note This section describes the behavior of Multisim’s original NI ELVIS I schematic.
Refer to The Virtual NI ELVIS II Schematic section for information on Multisim’s
NI ELVIS II functionality.
© National Instruments Corporation
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Complete the following steps to create a new virtual NI ELVIS I schematic:
1.
Select File»New»NI ELVIS I design. The schematic appears as
shown below:
1
1
Rails
Note The ground connector that appears at the bottom left of the diagram is the reference
point for measurements taken during simulation, and must not be removed.
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Virtual NI ELVIS and NI myDAQ
Place and wire components in the virtual NI ELVIS I schematic in the
same manner as other Multisim schematics. For details, refer to the
Multisim Help.
The prototyping board rails (see 1 in the figure above) found to the left and
right of the main workspace correspond to rails on the prototyping board of
the real-world version of NI ELVIS, and are labelled in the same manner.
Rows on the rails that are shown with green labels are not enabled for
simulation in Multisim. However, they can be used for schematic capture
and viewing of the completed virtual NI ELVIS I schematic in the 3D view.
Unlike other Multisim components, these rails cannot be moved to other
places on the workspace.
© National Instruments Corporation
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LEDs
Connections to the eight LEDs on the right side of the NI ELVIS I
schematic are found in the lower-right prototyping rail, as shown in the
figure below (2). Any of these LEDs (1) that are correctly driven light
during simulation.
1
2
1
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LEDs
2
3-4
LED Connections
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Chapter 3
Virtual NI ELVIS and NI myDAQ
To connect to an LED, place a wire from one of the LED rows (LED 0
through LED 7) to the desired point in your schematic.
There are also three power supply LEDs in the lower-left section of any
virtual NI ELVIS I schematic, as shown in the figure below (1).
1
1
Power Supply LEDs
During simulation, these LEDs light whether or not connections have been
made to their corresponding pins in the prototyping rail. They indicate that
power is available to the respective connections.
NI ELVIS I Instruments
One instance of each of the following NI ELVIS instruments is found in the
virtual NI ELVIS I schematic:
•
Oscilloscope—This instrument is a two-channel oscilloscope.
•
IV Analyzer and Multimeter—This instrument can be enabled as either
an IV analyzer, or a digital multimeter.
•
Function Generator—This instrument generates sine, square or
triangle waves.
•
Power Supplies—This device is a variable power supply.
© National Instruments Corporation
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Oscilloscope
The connections to the virtual NI ELVIS oscilloscope are found in the
upper-left prototyping rail.
To connect the oscilloscope, place wires from the points in your schematic
that you wish to measure to any of the pins on the CH A+, CH A–, CH B+,
CH B– or TRIGGER rows beside Oscilloscope. These rows correspond
to the terminals of the oscilloscope.
•
CH A+ —Positive input of channel A.
•
CH A– —Negative input of channel A.
•
CH B+ —Positive input of channel B.
•
CH B– —Negative input of channel B.
•
TRIGGER—Trigger input signal.
Complete the following steps to access the oscilloscope’s controls:
NI Multisim for Education
1.
Double-click on the the Oscilloscope label in the upper-left
prototyping rail. The instrument face for the Multisim virtual
oscilloscope displays.
2.
Refer to the Multisim Help for details on the use of this instrument.
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IV Analyzer and Multimeter
When a new virtual NI ELVIS I schematic is opened, the IV Analyzer is
disabled, and the Ammeter is enabled as shown in the above figure.
To disable the Ammeter and enable the IV Analyzer, double-click where
indicated on the virtual NI ELVIS I schematic.
To disable the IV Analyzer and enable the Ammeter, double-click again.
When the IV Analyzer is enabled, there is a slight delay when simulation is started
while a DC Sweep is performed. If the Ammeter is enabled, there is no delay.
Note
© National Instruments Corporation
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Complete the following to connect the IV Analyzer:
1.
Place wires from the component you wish to measure to the pins on the
3-WIRE, CURRENT HI and CURRENT LO rows. These rows
correspond to the inputs of the IV Analyzer. Refer to the figure below
for connections for a diode (1); PNP BJT (2); NPN BJT (3); NMOS
FET (4); PMOS FET (5).
2.
Disconnect any other wires from the DMM terminals.
1
5
2
4
3
1
2
Diode
PNP BJT
3
NPN BJT
4
NMOS
5
PMOS
Complete the following to connect the Ammeter/Ohmmeter:
1.
Place wires from the points in the design you wish to measure to the
pins on the CURRENT HI and CURRENT LO rows.
CURRENT HI corresponds to the + terminal of the meter and
CURRENT LO corresponds to the – terminal.
2.
NI Multisim for Education
Disconnect any other wires from the DMM terminals.
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Complete the following steps to access the controls for the enabled
instrument:
1.
Double-click just above the DMM label. If you have enabled the
IV Analyzer as described earlier, that instrument’s face appears. If
you have enabled the Ammeter, an instrument containing the
Ammeter and Ohmmeter functions of a multimeter appears.
2.
Refer to the Multisim Help for details on the use of these instruments.
Complete the following to connect the Voltmeter:
1.
Place wires from the points in the design you wish to measure to the
pins on the VOLTAGE HI and VOLTAGE LO rows.
VOLTAGE HI corresponds to the + terminal of the meter and
VOLTAGE LO corresponds to the – terminal.
2.
Disconnect any other wires from the DMM terminals.
Complete the following steps to access the controls for the Voltmeter:
1.
Double-click just below the DMM label. An instrument containing the
Voltmeter function of a multimeter appears.
2.
Refer to the Multisim Help for details on the use of this instrument.
Function Generator
Complete the following to connect the Function Generator:
1.
Place wires from the pins on the FUNC OUT, SYNC OUT, AM IN
and FM IN rows to the desired points in your schematic.
•
FUNC OUT—Output signal.
•
SYNC OUT—Outputs a TTL-compatible clock signal of the
same frequency as the output waveform.
•
AM IN—A signal input here controls the amplitude of the signal
at FUNC OUT.
•
FM IN—A signal input here controls the frequency of the signal
at FUNC OUT and SYNC OUT.
Complete the following steps to access the controls for the Function
Generator:
1.
Double-click on the Function Generator label. The properties dialog
for the NI ELVIS Function Generator appears.
2.
Click on the Value tab and enter the desired output parameters.
3.
Click OK to close the Function Generator’s properties dialog box.
© National Instruments Corporation
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Note This instrument can be used for transient analysis only. It does not function for
frequency-domain analyses. To run a frequency-domain analysis, use an AC source from
the Multisim Master database. For more information on analyses, refer to the Multisim
Help.
Power Supplies
The lower-left prototyping rail contains the following fixed DC power
supplies:
•
+15 V
•
–15 V
•
+5 V (also found in the lower-right prototyping rail).
Variable Power Supplies are also available:
•
SUPPLY+ (+12 V max)
•
SUPPLY– (–12 V max).
To connect to any of the power supplies, place wires from the pin on the
corresponding row to the desired point in the design.
Complete the following steps to access the controls for the variable power
supply:
1.
Double-click on Variable Power Supplies. The properties dialog box
for the NI ELVIS power supply appears.
2.
Click on the Value tab and enter the desired parameters.
3.
Click OK to close the properties dialog box.
The Virtual NI ELVIS II Schematic
A virtual NI ELVIS II schematic contains a number of items that
correspond to elements of the real-world NI ELVIS II workstation. The
connection and control of these elements is described in this section.
This section describes the behavior of Multisim’s NI ELVIS II schematic. Refer to
The Virtual NI ELVIS I Schematic section for information on Multisim’s original
NI ELVIS I functionality.
Note
During NI Circuit Design Suite (NI CDS) installation, the installer prompts you for
the NI ELVISmx installation CD, which is included in your NI CDS package. NI ELVISmx
enables the NI ELVIS II functionality in Multisim. If you do not install this software, the
NI ELVIS II functionality will be disabled in Multisim.
Note
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Complete the following steps to create a new virtual NI ELVIS II
schematic:
1.
Select File»New»NI ELVIS II design. When first opened, a virtual
NI ELVIS II schematic appears as shown below.
2
3
1
1
Rails
2
Platform Control Panel Scope Section
3
Platform Control Panel DMM Section
Note The ground connector that appears at the bottom left of the diagram is the reference
point for measurements taken during simulation, and must not be removed.
2.
© National Instruments Corporation
Place and wire components in the virtual NI ELVIS II schematic in the
same manner as other Multisim schematics. For details, refer to the
Multisim Help.
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The prototyping board rails (see 1 in the figure above) found to the left and
right of the main workspace correspond to rails on the prototyping board of
the real-world version of NI ELVIS II, and are labelled in the same manner.
At the top in the control panel sections (see 2 and 3 in the figure above),
there are icons for connecting to the oscilloscope, dynamic signal analyzer,
bode analyzer and digital multimeter. These instruments are isolated and
are not available in the rails of the prototyping board. They are found on the
main real-world NI ELVIS II unit.
Rows on the rails that are shown with green labels are not enabled for
simulation in Multisim. However, they can be used for schematic capture
and viewing of the completed virtual NI ELVIS II schematic in the 3D view.
Unlike other Multisim components, these rails and instrument icons cannot
be moved to other places on the workspace.
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LEDs
Connections to the eight LEDs on the right side of the NI ELVIS II
schematic are found in the NI ELVIS II Right-Bottom Rail Section, as
shown in the figure below (2). During simulation, any of these LEDs (1)
that are correctly driven will light.
1
2
1
LEDs
2
LED Connections
Complete the following to connect to an LED:
1.
© National Instruments Corporation
Place a wire from one of the LED rows (LED 0 through LED 7) to the
desired point in your schematic.
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There are also three power supply LEDs in the lower-left section of any
virtual NI ELVIS II schematic, as shown in the figure below (1):
1
1
Power Supply LEDs
During simulation, these LEDs will light whether or not connections have
been made to their corresponding pins in the prototyping rail. They indicate
that power is available to the respective connections.
Enabling NI ELVIS II Schematic Instruments for Simulation
NI ELVISmx instruments on the NI ELVIS II schematic can be enabled or
disabled for simulation on an individual basis. Each enabled instrument
consumes system resources, so setting unused instruments to disabled
improves simulation speed.
When an NI ELVISmx instrument is disabled, a small red “X” appears next
to the upper-right corner of the instrument icon on the schematic, as shown
in the figure below (1). By default, all instruments in a new NI ELVIS II
schematic begin as disabled.
1
1
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Indicates Instrument is Disabled for Simulation
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NI ELVISmx instruments that are placed directly onto a workspace from the
NI ELVISmx Instruments toolbar cannot be disabled for simulation. Refer to the
NI ELVISmx Instruments Toolbar section for more information.
Note
NI ELVISmx instruments’ enabled state for simulation may be modified in
any one of three ways:
•
Double-click on a disabled instrument to display its SFP. If simulation
is running, a warning displays advising you to stop simulation before
you enable the instrument.
•
Right-click on the instrument to display a context menu that includes
the item NI ELVIS II Instrument Enabled in Simulation. Select this
menu item to toggle its check mark and switch the instrument from
enabled to disabled and back again. This command is unavailable
during simulation.
•
Select Simulate»NI ELVIS II simulation settings to display the
NI ELVIS II Simulation Settings dialog box. This lists the NI ELVIS
instruments on the rails and platform control panel, with a check box
next to each one. Check/uncheck the instrument name to enable/
disable the instrument on the schematic. This menu item is disabled
during simulation.
This menu item is only active when an NI ELVIS II schematic is selected as the
active workspace.
Note
After enabling the desired instruments, run the simulation in the usual
manner.
Note
Refer to the Multisim Help for information about simulation.
NI ELVIS II Instruments
The following NI ELVIS II instruments are available in Multisim:
•
Oscilloscope—This instrument is a two-channel oscilloscope.
•
Dynamic Signal Analyzer—This instrument computes and displays the
RMS averaged power spectrum of a single channel.
•
Bode Analyzer—This instrument measures the gain and phase shift
versus frequency for passive or active linear designs.
•
Digital Multimeter—This instrument is a digital multimeter.
•
Arbitrary Waveform Generator—This instrument generates
user-specified waveforms.
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•
Function Generator—This instrument generates sine, square or
triangle waves.
•
Variable Power Supply—This device is a variable DC power supply.
•
Digital Reader—This instrument reads digital data.
•
Digital Writer—This instrument updates the digital output on the
NI ELVIS II Prototyping Board with user-specific digital patterns.
There are three ways to access NI ELVIS II instruments:
•
Use the pre-placed icons found on the NI ELVIS II schematic rails and
platform control panel sections.
•
Place them from the menu onto any Multisim workspace using
Simulate»Instruments»NI ELVISmx instruments»<instrument>.
•
Place them from the NI ELVISmx Instruments toolbar onto any
Multisim workspace. Refer to the NI ELVISmx Instruments Toolbar
section for more information.
An NI ELVIS II instrument soft front panel (SFP) is where you find that
instrument’s controls. To access any NI ELVIS II instrument’s SFP,
double-click on its icon.
For information about any of the NI ELVIS II instruments, click the Help
button on the instrument’s SFP to display the NI ELVISmx Help.
Oscilloscope
This instrument is a two-channel oscilloscope.
In NI ELVIS II schematics, this instrument’s pre-placed icon is located in
the NI ELVIS II Platform Control Panel Scope Section of the NI ELVIS II
schematic, as shown in the figure below (1).
1
1
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Oscilloscope Icon
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Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pins on the
NI ELVIS II Platform Control Panel Scope Section described below:
•
TRIG—Trigger input.
•
CH 0+ —Positive input of channel 0.
•
CH 0– —Negative input of channel 0.
•
CH 1+ —Positive input of channel 1.
•
CH 1– —Negative input of channel 1.
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
Complete the following steps to place this instrument directly onto any
Multisim workspace:
1.
Select Simulate»Instruments»NI ELVISmx instruments»
NI ELVISmx Oscilloscope.
2.
Click to place the instrument icon in the desired location on the
workspace.
3.
Wire in the same manner as any other Multisim instrument.
You can also use the NI ELVISmx Instruments toolbar to place this instrument.
Refer to the NI ELVISmx Instruments Toolbar section for more information.
Note
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
Dynamic Signal Analyzer
The NI ELVIS Dynamic Signal Analyzer computes and displays the
RMS averaged power spectrum of a single channel. A variety of
windowing and averaging modes can be applied to the signal. It also detects
the peak frequency component and estimates the actual frequency and
power.
© National Instruments Corporation
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In NI ELVIS II schematics, this instrument’s icon is located in the
NI ELVIS II Platform Control Panel Scope Section of the NI ELVIS II
schematic, as shown in the figure below (1).
1
1
Dynamic Signal Analyzer Icon
Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pins on the
NI ELVIS II Platform Control Panel Scope Section described below:
•
Note
TRIG—Trigger input.
•
CH 0+ —Positive input of channel 0.
•
CH 0– —Negative input of channel 0.
CH 1+ and CH 1– are not used for this device.
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
Complete the following steps to place this instrument directly onto any
Multisim workspace:
1.
Select Simulate»Instruments»NI ELVISmx instruments»
NI ELVISmx Dynamic Signal Analyzer.
2.
Click to place the instrument icon in the desired location on the
workspace.
3.
Wire in the same manner as any other Multisim instrument.
You can also use the NI ELVISmx Instruments toolbar to place this instrument.
Refer to the NI ELVISmx Instruments Toolbar section for more information.
Note
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
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Bode Analyzer
The NI ELVISmx Bode Analyzer measures the gain and phase shift
versus frequency for passive or active linear designs.
In NI ELVIS II schematics, this instrument’s icon is located in the
NI ELVIS II Platform Control Panel Scope Section of the NI ELVIS II
schematic, as shown in the figure below (1).
1
1
Bode Analyzer Icon
Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pins on the
NI ELVIS II Platform Control Panel Scope Section described below:
•
CH 0+ —Positive Stimulus.
•
CH 0– —Negative Stimulus.
•
CH 1+ —Positive Response.
•
CH 1– —Negative Response.
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
Complete the following steps to place this instrument directly onto any
Multisim workspace:
1.
Select Simulate»Instruments»NI ELVISmx instruments»
NI ELVISmx Bode Analyzer.
2.
Click to place the instrument icon in the desired location on the
workspace.
3.
Wire in the same manner as any other Multisim instrument.
You can also use the NI ELVISmx Instruments toolbar to place this instrument.
Refer to the NI ELVISmx Instruments Toolbar section for more information.
Note
© National Instruments Corporation
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For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
Digital Multimeter
This instrument is a digital multimeter (DMM).
In NI ELVIS II schematics, this instrument’s icon is located in the
NI ELVIS II Platform Control Panel DMM Section of the NI ELVIS II
schematic, as shown in the figure below (1).
1
1
Digital Multimeter Icon
Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pins on the
NI ELVIS II Platform Control Panel DMM Section described below:
•
V—Voltmeter input.
•
COM—Common input.
•
A—Ammeter input.
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
Complete the following steps to place this instrument directly onto any
Multisim workspace:
NI Multisim for Education
1.
Select Simulate»Instruments»NI ELVISmx instruments»
NI ELVISmx Digital Multimeter.
2.
Click to place the instrument icon in the desired location on the
workspace.
3.
Wire in the same manner as any other Multisim instrument.
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You can also use the NI ELVISmx Instruments toolbar to place this instrument.
Refer to the NI ELVISmx Instruments Toolbar section for more information.
Note
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
Arbitrary Waveform Generator
This instrument generates user-specified waveforms.
In NI ELVIS II schematics, this instrument’s icon is located in the
NI ELVIS II Left-Bottom Rail Section of the NI ELVIS II schematic, as
shown in the figure below (1).
1
1
© National Instruments Corporation
Arbitrary Waveform Generator Icon
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Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pins on the
NI ELVIS II Left-Bottom Rail Section described below:
•
AO 0—Output pin 0.
•
AO 1—Output pin 1.
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
Complete the following steps to place this instrument directly onto any
Multisim workspace:
1.
Select Simulate»Instruments»NI ELVISmx instruments»
NI ELVISmx Arbitrary Waveform Generator.
2.
Click to place the instrument icon in the desired location on the
workspace.
3.
Wire in the same manner as any other Multisim instrument.
You can also use the NI ELVISmx Instruments toolbar to place this instrument.
Refer to the NI ELVISmx Instruments Toolbar section for more information.
Note
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
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Function Generator
This instrument generates sine, square or triangle waves.
In NI ELVIS II schematics, this instrument’s icon is located in the
NI ELVIS II Left-Bottom Rail Section of the NI ELVIS II schematic, as
shown in the figure below (1).
1
1
Function Generator Icon
Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pin on the
NI ELVIS II Left-Bottom Rail Section described below:
•
© National Instruments Corporation
FGEN—Output from the device.
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Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
Complete the following steps to place this instrument directly onto any
Multisim workspace:
1.
Select Simulate»Instruments»NI ELVISmx instruments»
NI ELVISmx Function Generator.
2.
Click to place the instrument icon in the desired location on the
workspace.
3.
Wire in the same manner as any other Multisim instrument.
You can also use the NI ELVISmx Instruments toolbar to place this instrument.
Refer to the NI ELVISmx Instruments Toolbar section for more information.
Note
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
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Variable Power Supply
This device is a variable DC power supply.
In NI ELVIS II schematics, this instrument’s icon is located in the
NI ELVIS II Left-Bottom Rail Section of the NI ELVIS II schematic, as
shown in the figure below (1).
1
1
Variable Power Supply Icon
Complete the following step to connect the device:
1.
© National Instruments Corporation
Place wires from the desired points in your schematic to the pins on the
NI ELVIS II Left-Bottom Rail Section described below:
•
SUPPLY+ —Positive output.
•
SUPPLY– —Negative output.
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Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
Complete the following steps to place this instrument directly onto any
Multisim workspace:
1.
Select Simulate»Instruments»NI ELVISmx instruments»
NI ELVISmx Variable Power Supply.
2.
Click to place the instrument icon in the desired location on the
workspace.
3.
Wire in the same manner as any other Multisim instrument.
You can also use the NI ELVISmx Instruments toolbar to place this instrument.
Refer to the NI ELVISmx Instruments Toolbar section for more information.
Note
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
The left-bottom rail also contains the following fixed DC power supplies:
NI Multisim for Education
•
+15 V
•
–15 V
•
+5 V
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Digital Reader
This instrument reads digital data.
In NI ELVIS II schematics, this instrument’s icon is located in the
NI ELVIS II Right-Top Rail Section of the NI ELVIS II schematic, as
shown in the figure below (1).
1
1
Digital Reader Icon
Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pins on the
NI ELVIS II Right-Top Rail Section described below:
•
DIO 8–DIO 15—The inputs for the device.
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
© National Instruments Corporation
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Complete the following steps to place this instrument directly onto any
Multisim workspace:
1.
Select Simulate»Instruments»NI ELVISmx instruments»
NI ELVISmx Digital Reader.
2.
Click to place the instrument icon in the desired location on the
workspace.
3.
Wire in the same manner as any other Multisim instrument.
You can also use the NI ELVISmx Instruments toolbar to place this instrument.
Refer to the NI ELVISmx Instruments Toolbar section for more information.
Note
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
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Digital Writer
This instrument updates the digital output on the NI ELVIS Prototyping
Board with user-specific digital patterns.
In NI ELVIS II schematics, this instrument’s icon is located in the
NI ELVIS II Right-Top Rail Section of the NI ELVIS II schematic, as
shown in the figure below (1).
1
1
Digital Writer Icon
Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pins on the
NI ELVIS II Right-Top Rail Section described below:
•
DIO 0–DIO 7—The outputs for the device.
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
© National Instruments Corporation
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Complete the following steps to place this instrument directly onto any
Multisim workspace:
1.
Select Simulate»Instruments»NI ELVISmx instruments»
NI ELVISmx Digital Writer.
2.
Click to place the instrument icon in the desired location on the
workspace.
3.
Wire in the same manner as any other Multisim instrument.
You can also use the NI ELVISmx Instruments toolbar to place this instrument.
Refer to the NI ELVISmx Instruments Toolbar section for more information.
Note
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
NI ELVISmx Instruments Toolbar
The buttons in the NI ELVISmx Instruments toolbar are described below.
In each case, the button places a specific NI ELVISmx instrument on the
workspace.
Button
Description
NI ELVISmx Arbitrary Waveform Generator button.
Places an NI ELVISmx arbitrary waveform generator on
the workspace. Refer to the Arbitrary Waveform
Generator section for more information.
NI ELVISmx Digital Reader button. Places an
NI ELVISmx digital reader on the workspace. Refer to
the Digital Reader section for more information.
NI ELVISmx Digital Writer button. Places an
NI ELVISmx digital writer on the workspace. Refer to the
Digital Writer section for more information.
NI ELVISmx Digital Multimeter button. Places an
NI ELVISmx digital multimeter on the workspace. Refer
to the Digital Multimeter section for more information.
NI ELVISmx Dynamic Signal Analyzer button. Places
an NI ELVISmx dynamic signal analyzer on the
workspace. Refer to the Dynamic Signal Analyzer section
for more information.
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Button
Virtual NI ELVIS and NI myDAQ
Description
NI ELVISmx Function Generator button. Places an
NI ELVISmx function generator on the workspace. Refer
to the Function Generator section for more information.
NI ELVISmx Oscilloscope button. Places an
NI ELVISmx oscilloscope on the workspace. Refer to the
Oscilloscope section for more information.
NI ELVISmx Variable Power Supply button. Places an
NI ELVISmx variable power supply on the workspace.
Refer to the Variable Power Supply section for more
information.
NI ELVISmx Bode Analyzer button. Places an
NI ELVISmx bode analyzer on the workspace. Refer to
the Bode Analyzer section for more information.
NI ELVIS Prototyping Boards
Once you have completed the virtual NI ELVIS I or NI ELVIS II
schematic, you are ready to place the components on the 3D rendering of
the prototyping board.
© National Instruments Corporation
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The figure below shows the virtual NI ELVIS I 3D prototyping board (1)
and platform (2) with no placed components.
1
2
1
Prototyping Board
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The figure below shows the virtual NI ELVIS II 3D prototyping board (1)
and platform (2) with no placed components.
1
1
Prototyping Board
2
2
Platform
The controls that appear on the NI ELVIS I and the NI ELVIS II 3D platforms are
inactive. Interactive simulation is accomplished via the schematic view. For details on
simulation, refer to the Multisim Help.
Note
For information about changing the 3D view, refer to the Manipulating the
Breadboard View section of Chapter 2, Breadboarding.
Tip
© National Instruments Corporation
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Complete the following steps to place components on the 3D prototyping
board:
1.
Select Tools»View breadboard from the main Multisim menu.
For NI ELVIS I designs, the 3D prototyping board appears similar to
the example shown in the figure below:
1
3
1
Component Description
NI Multisim for Education
2
2
Place Component Bar
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Scroll Arrows
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For NI ELVIS II designs, the 3D prototyping board appears similar to
the example shown in the figure below:
1
2
3
1
Component Description
2
Place Component Bar
3
Scroll Arrows
Note The Place Component Bar, shown in the figures above (2), is where components
waiting to be placed on the prototyping board appear. To view other components, click the
scroll arrows (3). To see a description of a component (for example, (1) in the above
figure), hover the cursor over the component. 3D viewing options are set in the Global
Preferences dialog box. Refer to the 3D Options section of Chapter 2, Breadboarding for
more information.
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2.
Click on a component in the Place Component Bar and drag it to the
desired location on the board. As the component passes over the board,
sockets change color as shown in the figure below.
Red sockets (1) indicate where the component’s pins will be placed
when the mouse button is released. Green (2) indicates sockets that are
internally connected to the red socket in the same row on the board.
1
2
1
Red Socket
2
Connected Green Sockets
Tip Select <Ctrl-R> to rotate a selected component 90 degrees clockwise or
<Ctrl-Shift-R> to rotate it 90 degrees counter-clockwise.
NI Multisim for Education
3.
Release the mouse button to place the component. The colored (red
and green) sockets on the board no longer appear.
4.
Return to the schematic view and note that the color of the placed
component has changed as shown in the example below (R1).
5.
Continue placing the design’s components on the board. When all the
components have been placed, the Place Component Bar collapses.
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Where pins of components are connected on the schematic, you can place them in
connected sockets as circled in the figure below. This technique can reduce the number of
jumper wires required.
Tip
Note Refer to the Appearance of 3D Components section of Chapter 2, Breadboarding,
for more information.
Wiring Placed Components in 3D Mode
Note
This section applies to both NI ELVIS I and NI ELVIS II schematics.
By placing component pins that are connected on the schematic into
sockets on the 3D prototyping board that are internally connected, much of
the “wiring” can be done at the same time components are placed.
However, in most designs, it will also be necessary to place jumpers on the
3D prototyping board to complete the wiring of the placed components.
Complete the following steps to place a jumper wire:
1.
Click on a socket connected to the pin where you wish to start the
jumper and begin moving the cursor. Legitimate “target” pins (green)
display as you move the cursor.
2.
Click to place the jumper in the desired socket.
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3.
Return to the schematic view and note that the color of the wire
connecting the two pins has changed to green to indicate a connection
has been made, as shown in the figure below, between pin 2 of U2, and
pin 1 of U3.
If a net contains multiple connections, all must be connected before any of the wires
in the net change color.
Note
4.
Continue placing jumpers until all schematic connections have been
made.
Run a Design Rules and Connectivity Check from the 3D prototyping view to see
if there are any errors in your board. Refer to the DRC and Connectivity Check section of
Chapter 2, Breadboarding, for more information.
Tip
You may also wish to refer to the Viewing Component Information and Breadboard
Netlist dialog box sections of Chapter 2, Breadboarding.
Note
Virtual NI myDAQ
NI myDAQ is a low-cost, portable data acquisition device that students can
use to do laboratory-style measurements outside of the lab.
A virtual NI myDAQ schematic contains a number of items that correspond
to elements of the real-world NI myDAQ. The connection and control of
these elements is described in this section.
During NI Circuit Design Suite (NI CDS) installation, the installer prompts you for
the NI ELVISmx installation CD, which is included in your NI CDS package. NI ELVISmx
Note
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enables the NI myDAQ functionality in Multisim. If you do not install this software, the
NI myDAQ functionality will be disabled in Multisim.
Complete the following steps to create a new virtual NI myDAQ design:
1.
Select File»New»NI myDAQ design. When first opened, a virtual
NI myDAQ schematic appears as shown below.
2
1
1
Right Slot
2
Bottom Terminals
Note The ground connector that appears at the bottom left of the diagram is the reference
point for measurements taken during simulation, and must not be removed.
2.
© National Instruments Corporation
Place and wire components in the virtual NI myDAQ schematic in the
same manner as other Multisim schematics. For details, refer to the
Multisim Help.
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The connectors (see 1 in the figure above) found on the workspace
correspond to the connectors in the right slot of the real-world version of
the NI myDAQ, and are labelled in the same manner. In the bottom
terminals section of the workspace (see 2 in the figure above), there is an
icon for connecting to the digital multimeter.
Rows in the right slot that are shown with green labels are for schematic
capture only and are not available for simulation in Multisim.
The right slot section of the NI myDAQ schematic also contains the
following fixed DC power supplies:
•
–15 V
•
+15 V
Enabling NI myDAQ Schematic Instruments for Simulation
NI ELVISmx instruments on the NI myDAQ schematic can be enabled or
disabled for simulation on an individual basis. Each enabled instrument
consumes system resources, so setting unused instruments to disabled
improves simulation speed.
When an NI ELVISmx instrument is disabled, a small red “X” appears next
to the upper-right corner of the instrument icon on the schematic. By
default, all instruments in a new NI myDAQ schematic begin as disabled.
NI ELVISmx instruments may be enabled for simulation in these ways:
•
Double-click on a disabled instrument to display its SFP. This
automatically enables it. If simulation is running, a warning displays
advising you to stop simulation before you enable the instrument.
•
Right-click on the instrument to display a context menu that includes
the item NI myDAQ Instrument Enabled in Simulation. Select this
menu item to toggle the instrument from enabled to disabled and back
again. This command is unavailable during simulation.
•
Select Simulate»NI myDAQ simulation settings to display the
NI myDAQ Simulation Settings dialog box. This lists the
NI ELVISmx instruments with a check box next to each one.
Check/uncheck the instrument name to enable/disable the instrument
on the schematic. This menu item is disabled during simulation.
Note This menu item is only active when an NI myDAQ schematic is selected as the
active workspace.
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After enabling the desired instruments, run the simulation in the usual
manner.
Note
Refer to the Multisim Help for information about simulation.
NI ELVISmx Instruments in Virtual NI myDAQ
The following NI ELVISmx instruments are available in Multisim:
•
Digital Reader—This instrument reads digital data.
•
Digital Writer—This instrument updates the digital I/O (DIO) lines
with user-specified digital patterns.
•
Oscilloscope—This instrument is a two-channel oscilloscope.
•
Dynamic Signal Analyzer—This instrument computes and displays the
RMS averaged power spectrum of a single channel.
•
Bode Analyzer—This instrument measures the gain and phase shift
versus frequency for passive or active linear designs.
•
Arbitrary Waveform Generator—This instrument generates
user-specified waveforms.
•
Function Generator—This instrument generates sine, square or
triangle waves.
•
Digital Multimeter—This instrument is a digital multimeter.
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Digital Reader
This instrument reads digital data.
This instrument’s pre-placed icon is located in the NI myDAQ right slot
section of the NI myDAQ schematic, as shown in the figure below (1).
1
1
Digital Reader Icon
Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pins on the
NI myDAQ right slot section described below:
•
DIO 4–DIO 7—The inputs for the device.
Complete the following steps to access the SFP:
NI Multisim for Education
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
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For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
Digital Writer
This instrument updates the digital I/O (DIO) lines with user-specified
digital patterns.
This instrument’s pre-placed icon is located in the NI myDAQ right slot
section of the NI myDAQ schematic, as shown in the figure below (1).
1
1
© National Instruments Corporation
Digital Reader Icon
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Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pins on the
NI myDAQ right slot section described below:
•
DIO 0–DIO 3—The inputs for the device.
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
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Oscilloscope
This instrument is a two-channel oscilloscope.
This instrument’s pre-placed icon is located in the NI myDAQ right slot
section of the NI myDAQ schematic, as shown in the figure below (1).
1
1
Oscilloscope Icon
Complete the following step to connect the instrument:
1.
Note
Place wires from the desired points in your schematic to the pins on the
NI myDAQ right slot section described below:
•
AI 0+ —Positive input of channel 0.
•
AI 0– —Negative input of channel 0.
•
AI 1+ —Positive input of channel 1.
•
AI 1– —Negative input of channel 1.
These pins are shared with the Bode Analyzer and the Dynamic Signal Analyzer.
© National Instruments Corporation
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Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
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Dynamic Signal Analyzer
This instrument computes and displays the RMS averaged power spectrum
of a single channel. A variety of windowing and averaging modes can be
applied to the signal. It also detects the peak frequency component and
estimates the actual frequency and power.
This instrument’s pre-placed icon is located in the NI myDAQ right slot
section of the NI myDAQ schematic, as shown in the figure below (1).
1
1
© National Instruments Corporation
Dynamic Signal Analyzer Icon
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Complete the following step to connect the instrument:
1.
Note
Place wires from the desired points in your schematic to the pins on the
NI myDAQ right slot section described below:
•
AI 0+ —Positive input of channel 0.
•
AI 0– —Negative input of channel 0.
•
AI 1+ —Positive input of channel 1.
•
AI 1– —Negative input of channel 1.
These pins are shared with the Bode Analyzer and the Oscilloscope.
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
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Bode Analyzer
This instrument measures the gain and phase shift versus frequency for
passive or active linear designs.
This instrument’s pre-placed icon is located in the NI myDAQ right slot
section of the NI myDAQ schematic, as shown in the figure below (1).
1
1
© National Instruments Corporation
Bode Plotter Icon
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Complete the following step to connect the instrument:
1.
Note
Place wires from the desired points in your schematic to the pins on the
NI myDAQ right slot section described below:
•
AI 0+ —Positive input of channel 0 (stimulus).
•
AI 0– —Negative input of channel 0 (stimulus).
•
AI 1+ —Positive input of channel 1 (response).
•
AI 1– —Negative input of channel 1 (response).
These pins are shared with the Oscilloscope and the Dynamic Signal Analyzer.
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
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Arbitrary Waveform Generator
This instrument generates user-specified waveforms.
This instrument’s pre-placed icon is located in the NI myDAQ right slot
section of the NI myDAQ schematic, as shown in the figure below (1).
1
1
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Arbitrary Waveform Generator Icon
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Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pins on the
NI myDAQ right slot section described below:
•
AO 0—Output pin 0.
•
AO 1—Output pin 1.
These pins are shared with the Function Generator, so only one of these
instruments can be active at a time.
Note
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
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Function Generator
This instrument generates sine, square or triangle waves.
This instrument’s pre-placed icon is located in the NI myDAQ right slot
section of the NI myDAQ schematic, as shown in the figure below (1).
1
1
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Function Generator Icon
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Complete the following step to connect the instrument:
1.
Place wires from the desired points in your schematic to the pins on the
NI myDAQ right slot section described below:
•
AO 0—Output pin 0.
Note This pin is shared with the Arbitrary Waveform Generator, so only one of these
instruments can be active at a time.
Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
Digital Multimeter
This instrument is a digital multimeter (DMM).
This instrument’s pre-placed icon is located in the NI myDAQ bottom
terminals section of the NI myDAQ schematic, as shown in the figure
below (1).
1
1
Digital Multimeter Icon
Complete the following step to connect the instrument:
1.
NI Multisim for Education
Place wires from the desired points in your schematic to the pins on the
NI myDAQ bottom terminals section described below:
•
HI—Voltmeter and ohmmeter input.
•
COM—Common input.
•
HI—Ammeter input.
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Complete the following steps to access the SFP:
1.
Double-click the instrument’s icon, shown in the figure above (1). The
SFP appears.
2.
Change the settings in the SFP as desired.
For information about using this instrument, click the Help button on its
SFP to display the NI ELVISmx Help.
Virtual NI myDAQ Designs in the Breadboard View
As with other Multisim designs, you can view a virtual NI myDAQ design
in the Breadboard View.
The NI myDAQ bottom terminals that appear at the top of the myDAQ design, and
the NI myDAQ right slot that appears at the left of the myDAQ design appear as generic
ICs in the Breadboard View. These ICs can be placed on the breadboard.
Note
Refer to Chapter 2, Breadboarding, for more information.
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4
PLD Schematics
The following sections describe how to graphically define the internal
structure of a PLD (programmable logic device). They also describe how
to export the PLD design to VHDL files or programming files, and how to
program a connected PLD.
Some of the described features may not be available in your edition of
Multisim. Refer to the NI Circuit Design Suite Release Notes for a
description of the features available in your edition.
Overview
A PLD schematic defines the internal logical behavior of a PLD and the
interface to external logical connections. PLD schematics can be exported
to VHDL files, a programming file, or used to program a connected PLD
(FPGA).
A PLD schematic contains specialized components that define the
operation of the individual logic blocks of the PLD.
These PLD components include both SPICE models and VHDL export
data. This allows the components to be simulated in Multisim, and then
exported with VHDL-only data. Refer to the Editing a Component’s VHDL
Export Data section for information about the VHDL export data.
The PLD components are not compatible with older MultiVHDL components and
models. If you have a legacy copy of MultiVHDL, you can continue to use it. However,
co-simulation has been discontinued with version 11 of Circuit Design Suite.
Note
Some additional diagnostic components such as digital probes and
Multisim instruments can also be placed on a PLD schematic. These
components do not change the PLD topology and are not exported when an
Export to PLD command is executed.
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The PLD schematic:
•
restricts the components that can be placed to those that can be mapped
for VHDL export, and to special diagnostic components.
•
has special port connectors that map the external nets to internal
signals and identify the signal modes.
•
may enable programming of a connected PLD.
•
may enable generation and saving of a programming file.
•
enables export to VHDL.
You cannot export a PLD schematic to Ultiboard, or any other PCB layout
application. The PLD device in a Multisim schematic has no layout information.
Note
Components
Only a special category of components are allowed for PLD designs. Valid
components include exportable and diagnostic devices. They are located in
the PLD Logic, Sources, Indicators, and Misc groups of the database.
When a PLD schematic is active, the Select a Component dialog box name
changes to Select a Component (PLD Mode). Only valid components
appear in the dialog.
In the Select a Component (PLD Mode) dialog box, Model
manufacturer/ID displays the SPICE model manufacturer, and VHDL
export manufacturer/Name displays the source of the VHDL model.
Search functionality from the Select a Component (PLD Mode) dialog
box additionally allows searching for VHDL export data and only finds
valid PLD components. Titles on all search dialogs are appended with PLD
Mode.
Refer to the Multisim Help for more information.
Port Connectors
Port connectors represent the FPGA pins that are used by the PLD design.
You must define how the logic connects to the device pins by wiring the
internal design to the port connectors.
A port connector can be set to input, output, or bidirectional mode. The
mode defines the behaviors in simulation and PLD export. Input and output
modes allow input or output to the PLD, respectively. The bidirectional
mode may act as either an input or output, depending on the state of the
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control pin. When the signal on the control pin is high, the connector acts
as an output from the PLD. When the signal on the control pin is low, the
connector acts as an input to the PLD.
You cannot place global connectors on a PLD schematic. External nets
cannot be connected directly to internal PLD schematic nets. They must go
through port connectors.
A connector’s symbol changes based on its mode, as shown in the figure
below.
1
2
3
1
Input Connector
2
Output Connector
3
Bidirectional
Connector
You can define the connectors before creating your design if you know the
properties of the connectors you will use. Multisim will then allow you to
select these defined connectors when creating your design. Refer to the
Standard PLD Configuration File and Port Connectors Tab sections for
more information.
This is particularly useful if you know in advance how VHDL signal names
will be mapped to pins, for example, if the PLD is on an evaluation board.
Unlike undefined connectors, defined connectors retain their properties and
can be exported even when not placed on the schematic.
Refer to the Adding Port Connectors to a PLD Schematic and Port
Connector Dialog Box sections for more information.
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PLD Toolbar
The table below describes the buttons found in the PLD toolbar.
Button
Description
Input Connector button. Displays the Input Connector
dialog box. Use this to place an input connector on a PLD
schematic. Refer to the Adding Port Connectors to a PLD
Schematic section for more information.
Output Connector button. Displays the Output
Connector dialog box. Use this to place an output
connector on a PLD schematic. Refer to the Adding Port
Connectors to a PLD Schematic section for more
information.
Bidirectional Connector button. Displays the
Bidirectional Connector dialog box. Use this to place a
bidirectional connector on a PLD schematic. Refer to the
Adding Port Connectors to a PLD Schematic section for
more information.
PLD Settings button. Displays the PLD Settings dialog
box. Refer to the PLD Settings Dialog Box section for
more information.
PLD Topology Check button. Runs a topology check on
the selected PLD design. Refer to the Running a Topology
Check section for more information.
Export to PLD button. Displays the PLD Export dialog
box. Refer to the Exporting to PLD section for more
information.
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PLD Components Toolbar
The table below describes the buttons found in the PLD Components
toolbar. Refer to the Adding Components to a PLD Schematic section for
more information.
Button
Description
Place Logic Gate button. Displays the Select a
Component (PLD Mode) dialog box with the Logic
Gates Family selected. Select the desired logic gate in
the Component list and click OK to place it on the PLD
schematic.
Place Buffer button. Displays the Select a Component
(PLD Mode) dialog box with the Buffers Family
selected. Select the desired buffer in the Component list
and click OK to place it on the PLD schematic.
Place Latch button. Displays the Select a Component
(PLD Mode) dialog box with the Latches Family
selected. Select the desired latch in the Component list
and click OK to place it on the PLD schematic.
Place Flip-Flop button. Displays the Select a
Component (PLD Mode) dialog box with the
Flip-Flops Family selected. Select the desired flip-flop
in the Component list and click OK to place it on the
PLD schematic.
Place Encoder button. Displays the Select a Component
(PLD Mode) dialog box with the Encoders Family
selected. Select the desired encoder in the Component
list and click OK to place it on the PLD schematic.
Place Decoder button. Displays the Select a Component
(PLD Mode) dialog box with the Decoders Family
selected. Select the desired decoder in the Component
list and click OK to place it on the PLD schematic.
Place Counter button. Displays the Select a Component
(PLD Mode) dialog box with the Counters Family
selected. Select the desired counter in the Component list
and click OK to place it on the PLD schematic.
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Button
Description
Place Adder button. Displays the Select a Component
(PLD Mode) dialog box with the Adders Family
selected. Select the desired adder in the Component list
and click OK to place it on the PLD schematic.
Place Comparator button. Displays the Select a
Component (PLD Mode) dialog box with the
Comparators Family selected. Select the desired
comparator in the Component list and click OK to place
it on the PLD schematic.
Place Multiplexer button. Displays the Select a
Component (PLD Mode) dialog box with the
Multiplexers Family selected. Select the desired
multiplexer in the Component list and click OK to place
it on the PLD schematic.
Place Demultiplexer button. Displays the Select a
Component (PLD Mode) dialog box with the
Demultiplexers Family selected. Select the desired
demultiplexer in the Component list and click OK to
place it on the PLD schematic.
Place Shift Register button. Displays the Select a
Component (PLD Mode) dialog box with the Shift
Registers Family selected. Select the desired shift
register in the Component list and click OK to place it on
the PLD schematic.
Place Generator button. Displays the Select a
Component (PLD Mode) dialog box with the
Generators Family selected. Select the desired generator
in the Component list and click OK to place it on the
PLD schematic.
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Button
PLD Schematics
Description
Place Digital Source button. Displays the Select a
Component (PLD Mode) dialog box with the Digital
Sources Family selected. Select the desired digital
source in the Component list and click OK to place it on
the PLD schematic.
Place Probe button. Displays the Select a Component
(PLD Mode) dialog box with the Probe Family selected.
Select the desired probe in the Component list and click
OK to place it on the PLD schematic.
Creating a PLD Schematic
The New PLD Design wizard guides you through the steps of creating and
configuring the PLD schematic. You can create a PLD schematic as an
independent document, as a subcircuit, or as a hierarchical block in a
standard schematic.
Complete the following steps to create a new PLD schematic:
1.
Select File»New»PLD design.
Or
Select Place»New PLD subcircuit.
Or
Select Place»New PLD hierarchical block.
Refer to the Placing PLDs as Subcircuits and Hierarchical Blocks
section for more information.
With any of the above actions, step 1 of the New PLD Design wizard
appears.
2.
© National Instruments Corporation
Select one of the following as desired:
•
Use standard configuration—Select one of the following from
the drop-down list: NI Digital Electronics FPGA Board,
NI Digital Electronics FPGA Board (7 segment). Select one of
the standard configuration files if you want to use Multisim with
the NI Digital Electronics FPGA board. Refer to the Standard
PLD Configuration File section for more information.
•
Use custom configuration file—Select if you wish to use a
non-standard configuration file that you have created.
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•
Create empty PLD—Select if you wish to create a PLD using
saved default settings (will contain no defined connectors), or if
you wish to define connectors after creating the schematic.
Note When you select a PLD configuration file, Multisim indicates if generating a
programming file and programming a PLD will be enabled. This functionality cannot be
enabled for a design after the design has been created.
3.
Click Next to display step 2 of the New PLD Design wizard.
4.
Complete the following as desired:
•
PLD design name or PLD subcircuit name or Choose a file
name—Defaults to Programmable Logic Device 1,
Programmable Logic Device 2, and so on. Edit as desired.
•
PLD part number (optional)—Defaults to the FPGA named in
the configuration file that is referenced in step 1. If there is no
referenced configuration file, or the file has no part number
named, this field defaults to the last value selected. Edit to specify
the part number to show in the Bill of Materials report.
Note If you picked a PLD configuration file in step 1 of the New PLD Design wizard that
has programming information that includes a specific device, “(optional)” will not appear
in the field name and the field will not be editable.
5.
Click Next to display step 3 of the New PLD Design wizard.
Or
Click Finish to close the New PLD Design dialog box and open the
new PLD schematic without modifying Default operating voltages or
changing the defined connectors.
6.
NI Multisim for Education
If you clicked Next, step 3 of the New PLD Design wizard displays.
Edit the following in the Default operating voltages box as desired:
•
Input connector—The default operating voltage for all new
undefined input connectors in the PLD.
•
Output connector—The default operating voltage for all new
undefined output connectors in the PLD.
•
Bidirectional connector—The default operating voltage for all
new undefined bidirectional connectors in the PLD.
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7.
If you selected either Use standard configuration or Use custom
configuration file in step 1 of the wizard, the Select the defined
connectors to place on the PLD list also displays in step 3 of the
wizard. Use the checkboxes to select which defined connectors to
place on the PLD.
8.
Click Finish to close the New PLD Design dialog box and open the
new PLD schematic.
Standard PLD Configuration File
The standard PLD configuration files describe general properties of the
PLD on the NI Digital Electronics FPGA Board. Multisim includes
two PLD configuration files, which differ only by which port connectors
are placed on the schematic by default.
Select Digital Electronics FPGA Board (7 Segment) if you will be using
the 7 segment displays in your design. Otherwise, select Digital
Electronics FPGA Board.
Standard PLD configuration files are found in the pldconfig folder in the
install directory. The standard files are accessed from the Use standard
configuration drop-down list in step 1 of the New PLD Design wizard.
Subcircuits and Hierarchical Blocks
You can place PLD subcircuits (SCs) and hierarchical blocks (HBs) inside
a standard schematic. You can also place them in an existing PLD
schematic.
Note
You cannot place standard SCs or HBs in PLD schematics.
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Refer to the figure below for some examples.
1
2
3
4
5
6
1
2
3
PLD schematic with no subcircuit
or hierarchical block
Subcircuit in PLD schematic
Hierarchical block in PLD
schematic
4
5
6
PLD subcircuit in standard
schematic
PLD hierarchical block in standard
schematic
Hardware device target
Right-click on the hardware device target icon and select Export to PLD to display
the PLD Export wizard. Refer to the Exporting to PLD section for more information.
Tip
Input and output connectors in nested PLD schematics do not graphically
indicate their mode. In this case, the connectors have no effect on
simulation and export.
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1
2
1
Input or output connector in nested
block
2
Bidirectional connector in nested
block
Placing PLDs as Subcircuits and Hierarchical Blocks
You can create hierarchical designs to capture the PLD’s logic. Subsheets
nested in a PLD do not define additional PLDs. Rather, they define reusable
blocks in the PLD.
Refer to the Multisim Help for more information about hierarchical blocks
and subcircuits.
Placing a New PLD as a Subcircuit
Complete the following steps to place a new PLD as a subcircuit in a
standard schematic:
1.
Open a new or existing Multisim design.
2.
Select Place»New PLD subcircuit. Step 1 of the New PLD Design
wizard appears.
3.
Use the wizard to create the PLD subcircuit, as detailed in the Creating
a PLD Schematic section.
When you click Finish in either step 2 or step 3, a ghost image of the
PLD appears on the cursor.
4.
© National Instruments Corporation
Click to place the PLD on the workspace.
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Placing a New PLD as a Hierarchical Block
Complete the following steps to place a new PLD as a hierarchical block in
a standard schematic:
1.
Open a new or existing Multisim design.
2.
Select Place»New PLD hierarchical block. Step 1 of the New PLD
Design dialog box appears.
3.
Use the wizard to create the PLD subcircuit, as detailed in the Creating
a PLD Schematic section.
When you click Finish in either step 2 or step 3 of the wizard, a ghost
image of the PLD appears on the cursor.
4.
Click to place the PLD on the workspace.
Placing a New PLD Subcircuit in a PLD Schematic
Complete the following steps to place a new PLD subcircuit in a PLD
schematic:
1.
Open a new or existing PLD design.
2.
Select Place»New subcircuit. The Subcircuit Name dialog box
appears.
3.
Enter a Subcircuit Name and click OK to place the subcircuit on the
PLD schematic.
Placing a New PLD Hierarchical Block in a PLD Schematic
Complete the following steps to place a new PLD hierarchical block in a
PLD schematic:
NI Multisim for Education
1.
Open a new or existing PLD design.
2.
Select Place»New hierarchical block. The Hierarchical Block
Properties dialog box appears.
3.
Enter the File name of hierarchical block, Number of input pins,
Number of output pins, and click OK to place the hierarchical block
on the PLD schematic.
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Placing an Existing PLD Schematic as a Hierarchical Block in
a PLD Schematic
Complete the following steps to place an existing PLD schematic as a
hierarchical block in a PLD schematic:
Note
1.
Open a new or existing PLD design.
2.
Select Place»Hierarchical block from file. A standard Open dialog
box appears.
3.
Select the desired file and click Open. A ghost image of the
hierarchical block appears on the cursor.
Only a PLD schematic may be placed in a PLD schematic as a hierarchical block.
4.
Click to place it on the workspace.
Adding Components to a PLD Schematic
Complete the following steps to add a component to a PLD schematic:
1.
Open or create a PLD design.
2.
Select Place»Component to display the Select a Component (PLD
Mode) dialog box.
The components that display in this dialog are limited to those that can
be placed on a PLD schematic.
3.
Select the desired Group, Family and Component, and click to place
the component on the workspace.
Adding Port Connectors to a PLD Schematic
Complete the following steps to add an input, output, or bidirectional port
connector to a PLD schematic:
1.
Select Place»Connectors»Input connector.
Or
Select Place»Connectors»Output connector.
Or
Select Place»Connectors»Bidirectional connector.
Refer to the Standard PLD Configuration File section for information on
pre-defined port connectors.
Note
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2.
If port connectors are defined, the associated dialog box appears,
otherwise, skip to step 4.
Select one of the following radio buttons:
•
Create defined connector—This button is active if there are
defined connectors that have not been placed. Select one of these
connectors from the list below the radio button.
•
Create default connector—Select to place a new, undefined
connector on the PLD schematic.
3.
Click OK to close the dialog.
4.
A ghost image of the connector appears on the cursor.
5.
Click in the desired location to place the connector.
Port Connector Dialog Box
Complete the following steps to change the properties of a placed port
connector:
1.
Double-click on the placed connector to display the Port Connector
dialog box. The Value tab displays.
2.
Select a new Name from the drop-down list. This list displays all
available defined reference designators.
Or
Type a new value in the Name field. The RefDes defines the name of
the signal in exported VHDL.
3.
Select one of Input, Output, or Bidirectional from the Mode
drop-down list.
4.
Change the Operating voltage as desired. This value is used for
simulation only. It is not exported to VHDL.
In simulation, a signal is interpreted as low when the voltage level is less than half
of the operating voltage, and high when it is above half of the operating voltage.
Note
5.
6.
NI Multisim for Education
Optionally, click the Display tab and select one of:
•
Use schematic global setting—Check to use the Port names
setting in the Connectors box in the Sheet tab of the Sheet
Properties dialog box.
•
Show name—Check to display the selected connector’s name on
the workspace. You must uncheck Use schematic global setting
first.
Click OK to close the dialog box.
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You can set the default values for the operating voltages of all undefined PLD
connectors in the General tab of the PLD Settings dialog box. Refer to the General Tab
section for more information.
Note
PLD Settings Dialog Box
Use the PLD Settings dialog box to adjust port connector and general
settings for your PLD schematic.
Port Connectors Tab
Complete the following steps to make changes to the port connector
settings of a PLD schematic:
1.
Select the desired PLD schematic.
2.
Select Options»PLD settings to display the PLD Settings dialog box.
3.
Select the Port connectors tab. The following columns are for
information only, and cannot be edited.
4.
© National Instruments Corporation
•
Defined—A green indicator in this column means that the
corresponding port connector is defined for the PLD schematic
and retains its settings even when not placed on the schematic. If
you place a default connector as described in Adding Port
Connectors to a PLD Schematic, the indicator does not appear.
•
In use—A green indicator in this column means that the
corresponding port connector is on the PLD schematic.
Edit the following as desired:
•
Name—The name the connector has on the PLD schematic. The
Name also defines the name of the signal in exported VHDL.
•
Mode drop-down list—Select Input, Output, or Bidirectional.
•
General purpose checkbox—Select if you wish this connector to
be able to assume any mode during placement. This may only be
specified for defined connectors.
•
Operating voltage—The operating voltage of the connector. This
value is used for simulation only. It is not exported to VHDL.
•
Always export checkbox—Select to export a connector when an
Export to PLD command is executed, whether or not it is In Use.
This may only be specified for defined connectors. Refer to the
Exporting to PLD section for more information.
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5.
6.
Optionally, in the Defined connectors box:
•
Add button—Click to display the Add Defined Connector dialog
box. Refer to the Add Defined Connector dialog box section for
details.
•
Delete button—Click to delete the selected port connector. You
cannot delete a connector that is In Use.
Optionally, in the In use connectors box:
•
Set defined button—Click to set the selected undefined connector
as defined. The green indicator in the Defined column appears.
When creating a PLD, you can define the port connectors (name and properties) that
will be used in your design before creating the design. This is particularly useful if you
know in advance how VHDL signal names will be mapped to pins, for example, if the PLD
is on an evaluation board. Unlike undefined connectors, defined connectors retain their
properties and can be exported even when not placed on the schematic.
Tip
•
Set undefined button—Click to set the selected connector as
“undefined”. The green indicator in the Defined column
disappears. Use this button if you inadvertently set a connector to
“defined”.
The Set as default checkbox applies to the General tab only. Refer to the General
Tab section for more information.
Note
Add Defined Connector dialog box
The Add Defined Connector dialog box displays when you click the Add
button in the Port connectors tab of the PLD Settings dialog box. Refer to
the Port Connectors Tab section for more information.
Complete the following steps to add a defined port connector to a PLD
design:
NI Multisim for Education
1.
Select Options»PLD settings to display the PLD Settings dialog box.
2.
Select the Port connectors tab.
3.
Click Add. The Add Defined Connector dialog box displays.
4.
Set the following as desired:
•
Name—Edit as desired.
•
Mode drop-down list—Select Input, Output, or Bidirectional.
•
Operating voltage—The operating voltage of the connector. This
value is used for simulation only. It is not exported to VHDL.
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•
General purpose checkbox—Select to allow the connector to
assume any mode. When selected, the connector appears in the
Input Connector, Output Connector, and Bidirectional
Connector dialog boxes. Refer to the Adding Port Connectors to
a PLD Schematic section for information.
•
Always export checkbox—Select to export the connector, even if
it is not used in the design.
5.
Click Add. The new connector appears in the Port connectors tab.
6.
Continue adding connectors as described above, or click Done to close
the Add Defined Connector dialog box.
General Tab
Complete the following steps to make changes to the general settings of a
top-level PLD schematic:
1.
Select the desired PLD schematic.
Changes made in the following steps apply only to the top level of the selected PLD
schematic. Settings in subsheets such as hierarchical blocks are not changed.
Note
2.
Select Options»PLD settings to display the PLD Settings dialog box.
3.
Select the General tab.
4.
Edit the PLD part number to specify the part number shown in the
Bill of Materials. This is the PLD part number selected in step 2 of
the New PLD Design wizard.
You cannot edit this if you selected a PLD configuration file that has programming
information in step 1 of the New PLD Design wizard when you created the PLD design.
Note
5.
© National Instruments Corporation
Set the following in the Default operating voltages box as desired:
•
Input connector—The default operating voltage of all new
undefined input connectors in the PLD schematic.
•
Output connector—The default operating voltage of all new
undefined output connectors in the PLD schematic.
•
Bidirectional connector—The default operating voltage of all
new undefined bidirectional connectors in the PLD schematic.
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6.
Note
Select the following checkboxes in the Port connectors box as
desired:
•
Lock port connector names—Select to display a warning when
you attempt to rename a port connector.
•
Unconnected port connectors generate warning in topology
check—Refer to the Running a Topology Check section for more
information.
•
Unconnected output pins generate warning in topology
check—Refer to the Running a Topology Check section for more
information.
•
Export unconnected port connectors—Placed, unconnected
port connectors will be exported when an Export to PLD
command is executed.
•
Export unplaced defined port connectors—Select to export
port connectors that are defined in the PLD schematic file, but
have not been placed on the PLD schematic.
•
Export port connector buffers automatically—Select to
connect buffers from all input and output connectors to the
internal PLD design logic when an Export to PLD command is
executed. This prevents some errors from occurring when you
synthesize the exported VHDL.
Refer to the Exporting to PLD section for more information.
7.
Set the following in the Advanced box as desired:
•
8.
Source library—Component export data is added to the source
library. This must be the name of the source library (normally
work) in your VHDL synthesizer where you will add the exported
VHDL file.
Optionally, select the Set as default checkbox.
This checkbox applies to the General tab only. If you specified a PLD
configuration file when you created the PLD schematic, this file may
have operating voltages and port connector names locked. When
creating a new PLD using a configuration file that defines these, the
values in the configuration file take precedence. These settings take
precedence over the selection made in the General tab of the PLD
Settings dialog box.
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Exporting to PLD
After you have completed your design, you can export the PLD device for
use in another application.
When you select Transfer»Export to PLD, one of two dialog boxes
displays:
•
PLD Export wizard—The configuration file used in step 1 of the New
PLD Design wizard must have hardware device target information
defined for this dialog box to display. Refer to the PLD Export Dialog
Box section for details.
This selection uses Xilinx tools which you must obtain and install
separately. Only Xilinx devices are supported to compile, synthesize,
and program from within Multisim.
Multisim supports Xilinx 10.1 SP3 or later, as well as versions 12.x
and 13.x.
National Instruments supports the Xilinx Spartan 3E FPGA on the
NI Digital Electronics FPGA board.
Note Refer to the Enabling Programming for Unsupported PLDs section for information
on how to create custom configuration files to enable programming a Xilinx hardware
device target.
•
Export PLD to VHDL dialog box—If the configuration file used in
step 1 of the New PLD Design wizard did not have hardware device
target information defined, or if no configuration file was used, this
dialog box displays. Refer to the Export PLD to VHDL Dialog Box
section for details.
PLD Export Dialog Box
If the configuration file used in step 1 of the New PLD Design wizard
defined hardware device target information, use the following procedures
to export the PLD design. Otherwise, refer to the Export PLD to VHDL
Dialog Box section for instructions.
•
Programming a Connected PLD Device—Follow these instructions if
you want to program a PLD and the PLD device is connected to your
computer.
•
Generating a PLD Programming File—Follow these instructions if
you want to program a PLD and the PLD device is not connected to
your computer, or if you want to program a PLD at a later time. You
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must use Xilinx iMPACT to load the exported programming file onto
the PLD.
•
Generating VHDL Files—Follow these instructions if you want to
directly use third party tools for synthesis/simulation or you want to
view the generated VHDL.
Programming a Connected PLD Device
Complete the following steps to program a PLD device that is connected to
your computer.
Note National Instruments supports the Xilinx Spartan 3E FPGA on the NI Digital
Electronics FPGA board.
If you wish to program a PLD using a PLD design that was created in Multisim 11.0,
you must recreate the design in Multisim 11.0.1 or higher, using a standard configuration
file from the New PLD Design wizard. Otherwise, the Export PLD to VHDL dialog box
appears when you select Transfer»Export to PLD. Refer to the Export PLD to VHDL
Dialog Box section for more information.
Note
1.
Select Transfer»Export to PLD to run a Topology Check and
display step 1 of the PLD Export wizard.
Results of the Topology Check appear in the Results tab of the
Spreadsheet View. You can also manually run a Topology Check at
any time. Refer to the Running a Topology Check section for
information.
Correct any errors before proceeding.
We recommend that you also fix any warnings.
2.
Select Program the connected PLD. You must connect the required
hardware device target to your computer, otherwise an error message
will display when you click Finish to begin the programming process.
3.
Optionally, select the Save generated programming file checkbox to
save the generated programming file for later use in Xilinx iMPACT.
4.
Click Next to display step 2 of the PLD Export wizard.
5.
Complete the following as required:
•
NI Multisim for Education
Xilinx tool—Select one of:
–
Xilinx ISE Design Suite 13.1 32-bit—This will change
depending on your installed version of Xilinx.
–
Automatically detect tool—Select to automatically search
your computer for installed Xilinx tools. If more than
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one version is found, the Automatically Detect Tool dialog
box displays. Use this dialog box to select one of the found
versions of the Xilinx tool.
Any non-supported versions of the Xilinx tool that are installed will also be detected,
and listed as unsupported. Multisim supports Xilinx 10.1 SP3 or later, as well as versions
12.x and 13.x.
Note
–
Note
Manually select tool—Displays a file browser where you
navigate to the installation directory of the desired version of
the Xilinx tool.
•
Programming file—This only appears if you selected Save
generated programming file in the previous step. You can type
the file path and name, or click Browse to navigate to a different
location.
•
PLD part number drop-down list—Select the PLD from the
drop-down list. The contents of this list come from the PLD
configuration file that you used to set up your PLD design.
•
Refresh button—Click to determine the Device status if Not
checked is displayed. If Not detected displays, be sure that the
device is connected before proceeding.
If this button is greyed-out, Xilinx tools are not installed/found.
•
6.
Advanced settings table—Select a row in table to see a
description appear. Exercise caution when making changes.
Click Finish. A PLD Export dialog box displays the status of the steps
involved in the process. For example, Step 7 of 11: Map.
More detailed messages, warnings, and any errors appear in the
Results tab as the selected Xilinx tool programs the connected PLD.
These messages are supplied from the Xilinx tool. For information
about these, refer to the Xilinx help.
At the same time, an indicator consisting of moving zeroes and ones
appears below the hardware device target icon in the Design Toolbox.
If you cancel the PLD export, this indicator continues to move until the
current step is fully terminated.
If you click Hide, the PLD Export dialog box disappears, but the
indicator continues to move until the export completes. To show the
PLD Export dialog box again, select Transfer»View export
progress.
To cancel the PLD export, select Transfer»Cancel export.
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Generating a PLD Programming File
Complete the following steps to generate a programming file from a PLD
design:
If you wish to generate a PLD programming file using a PLD design that was created
in Multisim 11.0, you must recreate the design in Multisim 11.0.1 or higher, using a
standard configuration file from the New PLD Design wizard. Otherwise, the Export PLD
to VHDL dialog box appears when you select Transfer»Export to PLD. Refer to the
Export PLD to VHDL Dialog Box section for more information.
Note
1.
Select Transfer»Export to PLD to run a Topology Check and
display step 1 of the PLD Export wizard.
Results of the Topology Check appear in the Results tab of the
Spreadsheet View. You can also manually run a Topology Check at
any time. Refer to the Running a Topology Check section for
information.
Correct any errors before proceeding.
We recommend that you also fix any warnings.
2.
Select Generate and save programming file.
3.
Click Next to display step 2 of the PLD Export wizard.
4.
Complete the following as required:
•
Xilinx tool—Select one of:
–
Xilinx ISE Design Suite 13.1 32-bit—This will change
depending on your installed version of Xilinx.
–
Automatically detect tool—Select to automatically search
your computer for installed Xilinx tools. If more than
one version is found, the Automatically Detect Tool dialog
box displays. Use this dialog box to select one of the found
versions of the Xilinx tool.
Any non-supported versions of the Xilinx tool that are installed will also be detected,
and listed as unsupported. Multisim supports Xilinx 10.1 SP3 or later, as well as versions
12.x and 13.x.
Note
–
•
NI Multisim for Education
Manually select tool—Displays a file browser where you
navigate to the desired version of the Xilinx tool.
Programming file—You can type a file path and name, or click
Browse to navigate to a different location.
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PLD Schematics
•
PLD part number drop-down list—Select the PLD part from the
drop-down list.
•
Advanced settings table—Select a row in the table to see a
description appear. Exercise caution when making changes.
Click Finish. A PLD Export dialog box displays the status of the steps
involved in the process. For example, Step 3 of 9: Check syntax.
More detailed messages, warnings, and any errors appear in the
Results tab as the Xilinx tool generates and saves the programming
file. These messages are supplied from the selected Xilinx tool. For
information about these, refer to the Xilinx help.
At the same time, an indicator consisting of moving zeroes and
ones appears below the hardware device target icon in the Design
Toolbox.
If you cancel the PLD export, this indicator continues to move until the
current step is fully terminated.
If you click Hide, the PLD Export dialog box disappears, but the
indicator continues to move until the export completes. To show the
PLD Export dialog box again, select Transfer»View export
progress.
To cancel the PLD export, select Transfer»Cancel export.
Generating VHDL Files
Complete the following steps to generate VHDL files from a PLD design
that conform to IEEE VHDL specification Std 1076-2002:
1.
Select Transfer»Export to PLD to run a Topology Check and
display step 1 of the PLD Export wizard.
Results of the Topology Check appear in the Results tab of the
Spreadsheet View. You can also manually run a Topology Check at
any time. Refer to the Running a Topology Check section for
information.
Correct any errors before proceeding.
We recommend that you also fix any warnings.
2.
Select Generate and save VHDL files.
3.
Click Next to display step 2 of the PLD Export wizard.
4.
Optionally, type a new file path and file name in the Top level module
file field, or click Browse and navigate to the desired location for the
design file.
This file contains the topology of the PLD schematic.
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If port connector names are not locked, Multisim prompts you to lock them. Port
conectors are locked by default if you use one of the standard PLD configurations.
Note
5.
Select the Customize package file name checkbox if you wish to
enter your own file path and file name for the package file. Type a new
file path and file name in the Package file field, or click Browse and
navigate to the desired location.
Or
Deselect the Customize package file name checkbox if you wish to
automatically generate a name for the package file on export.
The package file contains definitions of all components in the PLD
schematic.
Right-click in the active Top level module file or Package file field and select Show
on Disk to go to where the generated files will be placed.
Tip
6.
Click Finish. Multisim exports two VHDL files—a top level module
file and a package file.
The top level module file (for example,
ProgrammableLogicDevice1.vhd) defines the top level for the
design. The package file contains the component definitions for the
PLD device. By default, these files are saved to the same directory as
the Multisim design.
The package file (for example,
ProgrammableLogicDevice1_pkg.vhd) is assumed to be in the
library work—the default library for most synthesizers. If this is
incorrect, you can change it in the PLD Settings dialog box. You can
specify VHDL export options in the General tab. Refer to the General
Tab section for details.
Multisim uses the port connector names to generate top-level signal
names. To prevent conflicts, and to ensure valid VHDL code, the signal
and entity names in the exported files may not always match the names
in the design. For example, a net may have the name 1, which is
not valid in VHDL. It is renamed to a similar but valid name, for
example, \1\.
Export PLD to VHDL Dialog Box
If the configuration file used in step 1 of the New PLD Design wizard did
not define hardware device target information, or if no configuration file
was used, use this procedure to export the PLD design to VHDL.
Otherwise, refer to the PLD Export Dialog Box section for instructions.
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You may export VHDL to use with any FPGA. The generated VHDL files
conform to IEEE VHDL specification Std 1076-2002.
Complete the following steps to export the PLD design to VHDL:
1.
Select Transfer»Export to PLD to run a Topology Check and
display the Export PLD to VHDL dialog box.
Results of the Topology Check appear in the Results tab of the
Spreadsheet View. You can also manually run a Topology Check at
any time. Refer to the Running a Topology Check section for
information.
2.
Optionally, type a new file path and file name in the Top level module
file field, or click Browse and navigate to the desired location for the
design file.
This file contains the topology of the PLD schematic.
Note
If port connector names are not locked, Multisim prompts you to lock them.
3.
Select the Customize package file name checkbox if you wish to
enter your own file path and file name for the package file. Type a new
file path and file name in the Package file field, or click Browse and
navigate to the desired location.
Or
Deselect the Customize package file name checkbox if you wish to
automatically generate a name for the package file on export.
The package file contains definitions of all components in the PLD
schematic.
Right-click in the active Top level module file or Package file field and select Show
on Disk to go to where the generated files will be placed.
Tip
4.
Click OK to export. Multisim exports two VHDL files—a design file
and a package file.
The top level module file (for example,
ProgrammableLogicDevice1.vhd) defines the top level for the
design. The package file contains the component definitions for the
PLD device. By default, these files are saved to the same directory as
the Multisim design.
The package file (for example,
ProgrammableLogicDevice1_pkg.vhd) is assumed to be in the
library work—the default library for most synthesizers. If this is
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incorrect, you can change it in the PLD Settings dialog box. You can
specify VHDL export options in the General tab. Refer to the General
Tab section for details.
Multisim uses the port connector names to generate top-level signal
names. To prevent conflicts, and to ensure valid VHDL code, the signal
and entity names in the exported files may not always match the names
in the design. For example, a net may have the name 1, which is
not valid in VHDL. It is renamed to a similar but valid name, for
example, \1\.
Running a Topology Check
A Topology Check identifies errors and warnings in a PLD design.
Errors verify that:
•
there is at least one used port connector in the design.
•
port connectors are not directly connected to another port connector.
Warnings:
•
verify that all pins on a PLD component are connected to other PLD
components or to a port connector. Unconnected pins are marked open
in the VHDL netlist.
•
check for unconnected port connectors. To disable this warning,
uncheck Unconnected port connectors generate warning in
topology check in the General tab of the PLD Settings dialog box.
•
check for unconnected output pins. To disable this warning, uncheck
Unconnected output pins generate warning in topology check in
the General tab of the PLD Settings dialog box.
•
identify components that are not exportable such as diagnostic
components.
•
check that all nets have at least one input and one output pin.
Complete the following steps to run a manual Topology Check:
1.
Select Tools»PLD topology check.
Any errors and warnings display in the Results tab of the Spreadsheet
View with appropriate descriptive text.
2.
NI Multisim for Education
Right-click on an error or warning and select Go to from the context
menu that appears. Depending on the error, the source of the selected
error or warning may be highlighted on the workspace.
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Editing a Component’s VHDL Export Data
Each PLD component includes VHDL export data as well as a standard
SPICE model.
You can edit the VHDL export data from the VHDL export tab of the
Component Properties dialog box. This tab is only available for PLD
components.
PLD components do not have footprints or electronic parameters. Consequently, the
Footprint and Electronic param tabs in the Component Properties dialog box do not
display for PLD components. Refer to the Multisim Help for more information about the
Component Properties dialog box.
Note
Complete the following steps to display a placed component’s export
properties:
1.
Double-click on the placed component to display its properties dialog
box.
2.
Click the Value tab.
3.
Click Edit component in DB. The Component Properties dialog box
appears.
4.
Click the VHDL export tab. The following appear in this tab:
© National Instruments Corporation
•
VHDL export name area—Displays the VHDL export models
associated with the selected component. This field cannot be
edited directly. Use Add/Edit or Delete export data if you wish
to modify the contents of this field.
•
VHDL export data area—Displays the VHDL export model data
of the selected component. This field cannot be edited directly. Its
contents change based on the selection in the VHDL export name
area.
•
Symbol pins column—Found in the Pin mapping table.
Displays the names of the pins associated with the symbol.
•
VHDL export ports column—Found in the Pin mapping table.
Use to map the component’s Symbol pins to its VHDL export
ports. Edit with care.
•
Add from comp button—Click to select a component, whose
VHDL export model you wish to use, from the existing Multisim
database.
•
Add/Edit button—Use to add or edit a new or existing VHDL
export model in the Multisim database.
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•
Delete export data button—Clears the contents of the tab.
•
Show template button—Use to display the Symbol to port
mapping table. Edit with care.
Enabling Programming for Unsupported PLDs
National Instruments supports the Xilinx Spartan 3E FPGA on the
NI Digital Electronics FPGA Board. If you select one of the supplied PLD
configuration files when creating the PLD design, you can generate a
programming file for this FPGA or directly program the connected board.
However, you can create a custom PLD configuration file to enable
programming of additional FPGAs. Note that National Instruments does
not support additional FPGAs.
By creating a custom PLD configuration file, you can enable generation of
a programming file and programming of a connected PLD for unsupported
PLDs. Though unsupported, you can expect this functionality to work for
unsupported PLDs if the device is a Xilinx FPGA, and it can be compiled
and synthesized with 32 bit Xilinx ISE Design Suite 10.1 SP3 or later,
Xilinx ISE Design Suite 12.x, or Xilinx ISE Design Suite 13.x.
Custom PLD Configuration Files
PLD configuration files describe general properties of a PLD and the
connections you can make to the PLD. PLD configuration files may also
contain information on how to generate a programming file and program a
connected PLD.
Files with the extension .mspc are Multisim PLD configuration files. To
create a new PLD configuration file, you can:
•
create a PLD schematic with the desired PLD connectors, and export
it as a PLD configuration file. From PLD design, select
Transfer»Export to PLD configuration.
•
create the PLD configuration in another application and save the file
with a .mspc extension. Refer to the Creating a Custom PLD
Configuration File in Another Application section for more
information.
Once you have created a custom PLD configuration file, you can select it
in the Use custom configuration file field in step 1 of the New PLD
Design wizard. Refer to the Creating a PLD Schematic section for more
information.
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Alternatively, you can add the custom PLD configuration file to the same
directory as the standard PLD configuration files. These files become
available in the Use standard configuration drop-down list. Refer to the
Standard PLD Configuration File and Creating a PLD Schematic sections
for more information.
Creating a Custom PLD Configuration File in Another Application
You can create a custom PLD configuration file in another application.
This is useful if you need to change information that cannot be set in the
Multisim user interface. For example, to enable generating a programming
file and programming a connected PLD other than the NI Digital
Electronics FPGA Board.
PLD configuration files use an XML format. The format is documented in
PLDConfigurationSchema.xsd, which is found in the pldconfig
folder in the install directory.
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5
Ladder Diagrams
This chapter describes Multisim’s ladder diagram functionality.
Some of the described features may not be available in your edition of
Multisim. Refer to the NI Circuit Design Suite Release Notes for a
description of the features available in your edition.
Overview
You can use the Education edition of Multisim to create and simulate
Ladder Diagrams. These diagrams are electrically based, as opposed to
the binary/digital representations employed by ladder logic. Diagrams of
this type are used extensively for industrial motor control designs.
Ladder Diagrams are able to drive output devices or take input data from
regular schematics and embed the instructions on how input states affect
output states. This can be done in either the same schematic or separate
hierarchical blocks or subcircuits that contain the Ladder Diagram.
Refer to the Multisim Help for a complete description of hierarchical blocks and
subcircuits.
Note
Creating a Ladder Diagram
This section describes the steps required to make a simple Ladder
Diagram. You should understand the concepts described here before
reviewing the more complex designs found in this chapter.
This section describes how to build the Ladder Diagram that is used in the
AND Rungs and OR Rungs section.
© National Instruments Corporation
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Notes about the above design:
NI Multisim for Education
•
The relays (X1-X4) are normally open relays. When their controlling
coils (M1or M2) are energized they close. The controlling coils are set
in the Value tab of each relay’s properties dialog box.
•
Both X1 AND X2 must be closed for the lamp in the AND rung (X5)
to light up.
•
Either X3 OR X4 must be closed for the lamp in the OR rung (X6) to
light up.
•
Coil M1 controls the relays with M1 as their reference. (X1 and X3).
•
Coil M2 controls the relays with M2 as their reference. (X2 and X4).
•
Use keys 1 and 2 on your keyboard to open and close switches J1 and
J2, or hover your cursor over the desired switch and click on the button
that appears.
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Complete the following steps to add the diagram’s rungs:
1.
Select Place»Ladder rungs. The cursor appears with the rung’s left
and right terminators attached.
2.
Click to place the first rung and continue clicking and placing until you
have placed four rungs as shown below. Right-click to stop placing
rungs.
Complete the following steps to add components to the rungs:
1.
Note
Select Place»Component, navigate to the Normally Open Relay
Contact (RELAY_CONTACT_NO) and click OK.
This device is found in the Ladder Diagrams Group, Ladder Contacts Family.
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NI Multisim for Education
2.
Drop the relay contact directly onto the first rung.
3.
Continue in this manner until all relay contacts have been placed.
(X4 must be placed and then wired separately).
4.
Place the lamps (Group–Indicators, Family–Lamp).
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5.
Place relay coils M1 and M2 on the third and fourth rungs
(Group–Ladder Diagrams, Family–Ladder Relay Coils).
6.
Place switches J1 and J2.
7.
Double-click on each switch, select the Value tab, and change the Key
for toggle for J1 to 1 and the Key for toggle for J2 to 2.
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Complete the following steps to change the controlling device reference for
X2 and X4:
1.
Double-click on X2 and click the Value tab.
2.
Enter M2 in the Coil Reference field and click OK.
Repeat for X4. The completed Ladder Diagram appears as shown below.
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AND Rungs and OR Rungs
This section illustrates the difference between AND rungs and OR rungs
that are found in Ladder Diagrams. You should understand the concepts
described here before reviewing the more complex designs found in this
chapter.
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Complete the following steps to activate the lamp in the OR rung:
1.
Select Simulate»Run to start simulation of the design.
2.
Press 1 on your keyboard to close J1 (or hover your cursor over J1 and
click the button that appears).
As shown in the figure below, pressing 1, closes J1 which activates coil
M1 (1). All relays with M1 as their reference are energized (2).
X6 lights because only X3 or X4 need to be energized to complete the
circuit (3).
2
2
3
1
1
2
Coil M1 activates
Coils with M1 reference energize
3
X6 lights
If you press 2 on your keyboard (or hover your cursor over J2 and click
the button that appears), J2 closes which activates coil M2. X6 lights
because X4 is energized.
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Complete the following steps to active the lamp in the AND rung:
1.
Select Simulate»Run to start simulation of the design.
2.
Press 1 and 2 on your keyboard to close J1 and J2.
As shown in the figure below, pressing 1, closes J1 which activates coil
M1 (1). Pressing 2 closes J2 which activates coil M2 (2). All relays
with M1 and M2 as their references are energized (3). X6 lights
because X3 OR X4 is energized and the circuit is complete (4).
X5 lights because X1 AND X2 are energized and the circuit is
complete (5).
3
5
3
4
3
1
2
1
2
3
© National Instruments Corporation
Coil M1 activates
Coil M2 activates
Relays with M1 and M2 references energize
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5
X6 lights
X5 lights
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Sample Designs
Holding Tank
This section contains an example of a logic diagram that drives a design
that fills and then empties a fluid holding tank.
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Note The Ladder Diagram is contained in a separate Hierarchical Block called
HoldingTankLogic. For details on hierarchical blocks, refer to the Multisim Help.
Complete the following steps to activate this design:
1.
Select Simulate»Run to begin simulation.
2.
Press P on your keyboard to activate the Power temporary switch (or
hover your cursor over the Power switch and click the button that
appears). This sends 5 V to pin IN4 of Input Module U2 (Input
Module Base Address = 100) which in turn energizes Input Contact
X1 in the Power Lock-up Rung of the ladder diagram. Relay Coil M1
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is energized, causing all Relay Contacts with Relay Device
Reference = M1 to energize.
Complete the following steps to run the holding tank design:
1.
Activate the design as described above.
2.
Press R on your keyboard (or hover your cursor over the Run switch
and click the button that appears) to activate the Run temporary switch.
Select Window»Tile vertical to view the ladder diagram and the circuit at the same
time. Observe the interaction between the ladder diagram and the circuit as the simulation
proceeds.
Tip
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Chapter 5
Ladder Diagrams
As the simulation proceeds, the tank begins to fill.
© National Instruments Corporation
5-13
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Chapter 5
Ladder Diagrams
When the level of the fluid in the tank gets to the Set Point, fluid stops
being pumped.
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5-14
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Chapter 5
Ladder Diagrams
After a delay of five seconds, the tank begins to empty.
When the tank is empty, the flow stops.
© National Instruments Corporation
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Chapter 5
Ladder Diagrams
Complete the following to turn off the power at any point in the simulation:
1.
Press K on your keyboard (or hover your cursor over the Kill switch
and click the button that appears) to activate the Kill temporary switch.
This sends 5 V to pin IN3 of Input Module U2 (Input Module Base
Address = 100) which in turn energizes Input Contact X2 (the contact
opens). The continuity in the Power Lock-up Rung is broken and Relay
Coil M1 is de-energized, which in turn switches off all Relay Contacts
with Controlling Device Reference = M1.
When you press K, X20 is also temporarily energized, which in turn
temporarily energizes Output Coil Y2, which sends a pulse to pin Out3
of Output Module U3. This is wired to the Stop pin of the holding tank,
so the tank stops filling or emptying (depending on which is currently
occuring).
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Chapter 5
Ladder Diagrams
Conveyor Belt
This section contains an example of a Ladder Diagram that drives a
conveyor belt.
© National Instruments Corporation
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NI Multisim for Education
Chapter 5
Ladder Diagrams
Note The ladder diagram is contained in a separate hierarchical block called
ConveyorLogic. For details on hierarchical blocks, refer to the Multisim Help.
Complete the following steps to activate this design:
NI Multisim for Education
1.
Select Simulate»Run to begin simulation.
2.
Press P on your keyboard (or hover your cursor over the Power switch
and click the button that appears) to activate the Power temporary
switch. This sends 5 V to pin IN2 of Input Module U4 (Input Module
Base Address = 101) which in turn energizes Input Contact X1 in the
Power Lock-up Rung of the ladder diagram. Relay Coil M1 is
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Chapter 5
Ladder Diagrams
energized, causing all Relay Contacts with Controlling Device
Reference = M1 to energize.
Complete the following steps to run the conveyor belt:
1.
Activate the design as described earlier.
2.
Press R on your keyboard (or hover your cursor over the Run switch
and click the button that pops up) to activate the Run temporary switch.
Select Window»Tile vertical to view the ladder diagram and the circuit at the same
time. Observe the interaction between the ladder diagram and the circuit as the simulation
proceeds.
Tip
© National Instruments Corporation
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NI Multisim for Education
Chapter 5
Ladder Diagrams
As the simulation proceeds, the box moves along the conveyor belt to
Position Sensor 2 (PS2). The box stops moving and balls begin
dropping from the hopper into the box.
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Chapter 5
Ladder Diagrams
When five balls have dropped into the box (counted by Count sensor
and C1), the hopper stops dropping balls.
© National Instruments Corporation
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Chapter 5
Ladder Diagrams
The conveyor continues moving and stops when the box gets to
Position Sensor 3 (PS3).
Complete the following to turn off the power at any point in the simulation:
1.
Press K on your keyboard (or hover your cursor over the Kill switch
and click the button that appears) to activate the Kill temporary switch.
This sends 5 V to pin IN3 of Input Module U4 (Input Module Base
Address = 101) which in turn energizes Input Contact X3 (the contact
opens). The continuity in the Power Lock-up Rung is broken and Relay
Coil M1 is de-energized, which in turn switches off all Relay Contacts
with Relay Device Reference = M1.
When you press K, X19 is also temporarily energized, which in turn
temporarily energizes Output Coil Y2, which sends a pulse to pin Out3
of Output Module U2. This is wired to the Stop pin of the conveyor
belt, so the belt stops.
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Chapter 5
Ladder Diagrams
Traffic Light
The ladder diagram in this section runs two traffic lights.
© National Instruments Corporation
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Chapter 5
Ladder Diagrams
Note The ladder diagram is contained in a separate hierarchical block called
TrafficLightLogic. For details on hierarchical blocks, refer to the Multisim Help.
Complete the following steps to run the traffic lights:
1.
Select Simulate»Run.
2.
Press P on your keyboard (or hover your cursor over the Power switch
and click the button that pops up) to activate the Power momentary
switch.
Select Window»Tile vertical to view the ladder diagram and the circuit at the same
time. Observe the interaction between the ladder diagram and the circuit as the simulation
proceeds.
Tip
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Chapter 5
Ladder Diagrams
The red and green lights in traffic lights U1 and U3 light as shown
below.
After 15 seconds, the green lights turn amber.
© National Instruments Corporation
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NI Multisim for Education
Chapter 5
Ladder Diagrams
After 5 more seconds, the amber lights turn red and the red lights turn
green.
After 15 seconds, the green lights turn amber.
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Chapter 5
Ladder Diagrams
After 5 more seconds, the amber lights turn red and the red lights turn
green.
3.
© National Instruments Corporation
The cycle continues in this way until you stop the simulation, or press
<K> (or hover your cursor over the Kill switch and click the button that
appears) to activate the Kill momentary switch.
5-27
NI Multisim for Education
Technical Support and
Professional Services
A
Visit the following sections of the award-winning National Instruments
Web site at ni.com for technical support and professional services:
•
Support—Technical support resources at ni.com/support include
the following:
–
Self-Help Technical Resources—For answers and solutions,
visit ni.com/support for software drivers and updates, a
searchable KnowledgeBase, product manuals, step-by-step
troubleshooting wizards, thousands of example programs,
tutorials, application notes, instrument drivers, and so on.
Registered users also receive access to the NI Discussion Forums
at ni.com/forums. NI Applications Engineers make sure every
question submitted online receives an answer.
–
Standard Service Program Membership—This program
entitles members to direct access to NI Applications Engineers
via phone and email for one-to-one technical support, as well as
exclusive access to eLearning training modules at ni.com/
eLearning. NI offers complementary membership for a full year
after purchase, after which you may renew to continue your
benefits.
For information about other technical support options in your
area, visit ni.com/services, or contact your local office at
ni.com/contact.
•
Training and Certification—Visit ni.com/training for training
and certification program information. You can also register for
instructor-led, hands-on courses at locations around the world.
•
System Integration—If you have time constraints, limited in-house
technical resources, or other project challenges, National Instruments
Alliance Partner members can help. To learn more, call your local
NI office or visit ni.com/alliance.
You also can visit the Worldwide Offices section of ni.com/niglobal
to access the branch office Web sites, which provide up-to-date contact
information, support phone numbers, email addresses, and current events.
© National Instruments Corporation
A-1
NI Multisim for Education
Index
B
I
Breadboard Netlist dialog box, 2-14
Breadboard Settings, 2-2
instrument drivers (NI resources), A-1
K
C
KnowledgeBase, A-1
circuit restrictions
setting, 1-5
conventions used in the manual, v
custom PLD configuration files, 4-28, 4-29
L
ladder diagrams, 5-1
AND rungs, OR rungs, 5-7
creating, 5-1
sample designs, 5-10
D
Defined Port Connector dialog box, 4-16
diagnostic tools (NI resources), A-1
documentation
conventions used in the manual, v
NI resources, A-1
drivers (NI resources), A-1
N
National Instruments support and
services, A-1
NI ELVIS II Simulation Settings dialog
box, 3-14
NI ELVISmx instruments in myDAQ, 3-41
NI ELVISmx Instruments toolbar, 3-30
NI myDAQ
arbitrary waveform generator, 3-51
bode analyzer, 3-49
breadboard view, 3-55
digital multimeter, 3-54
digital reader, 3-42
digital writer, 3-43
dynamic signal analyzer, 3-47
function generator, 3-53
oscilloscope, 3-45
NI myDAQ Simulation Settings dialog
box, 3-40
NI support and services, A-1
E
examples (NI resources), A-1
Export PLD to VHDL dialog box, 4-24
exporting to VHDL, 4-19, 4-24
G
global restrictions
passwords, 1-7
setting, 1-2
H
help, technical support, A-1
© National Instruments Corporation
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NI Multisim for Education
Index
P
R
passwords, creating/changing, 1-7
PLD Components toolbar, 4-5
PLD Export dialog box, 4-19
PLD schematic
adding bidirectional connectors, 4-13
adding components, 4-13
adding input connectors, 4-13
adding output connectors, 4-13
adding port connectors, 4-13
components, 4-2
creating, 4-7
editing VHDL export data, 4-27
exporting to PLD, 4-19
exporting to VHDL, 4-19, 4-24
overview, 4-1
placing hierarchical blocks, 4-11
placing subcircuits, 4-11
PLD Components toolbar, 4-5
PLD toolbar, 4-4
PLD Wizard, 4-7
Port Connector dialog box, 4-14
port connectors, 4-2
standard PLD configuration file, 4-9
subcircuits and hierarchical blocks, 4-9
topology check, 4-26
VHDL export tab, 4-27
PLD Settings dialog, 4-15
General tab, 4-17
Port Connectors tab, 4-15
PLD toolbar, 4-4
PLD Wizard, 4-7
port connectors, 4-2
programming examples (NI resources), A-1
programming unsupported PLDs, 4-28
restrictions
about, 1-2
setting circuit, 1-5
setting global, 1-2
NI Multisim for Education
S
setting circuit restrictions, 1-5
setting global restrictions, 1-2
Simplified Version, 1-2
software (NI resources), A-1
standard PLD configuration file, 4-9
support, technical, A-1
T
technical support, A-1
training and certification (NI resources), A-1
troubleshooting (NI resources), A-1
V
VHDL export tab, 4-27
Virtual NI ELVIS
overview, 3-1
Virtual NI ELVIS I
3D prototyping board, 3-31
ammeter, 3-7
function generator, 3-9
instruments, 3-5
IV Analyzer, 3-7
oscilloscope, 3-6
power supplies, 3-10
prototyping board LEDs, 3-1
schematic, 3-1
Volt/Ohmmeter, 3-7
wiring placed components in 3D, 3-37
I-2
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Index
Virtual NI ELVIS II Instruments
setting instruments to simulate, 3-14
Virtual NI myDAQ, 3-38
simulation settings, 3-40
Virtual NI myDAQ Instruments
setting instruments to simulate, 3-40
Virtual NI ELVIS II
3D prototyping board, 3-31
arbitrary waveform generator, 3-21
bode analyzer, 3-19
digital multimeter, 3-20
digital reader, 3-27
digital writer, 3-29
dynamic signal analyzer, 3-17
function generator, 3-23
instruments, 3-15
oscilloscope, 3-16
prototyping board LEDs, 3-10
schematic, 3-10
simulation settings, 3-14
variable power supply, 3-25
© National Instruments Corporation
W
Web resources, A-1
I-3
NI Multisim for Education
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