National Instruments Computer Accessories PXI 8460 User Manual

CAN  
Getting Started with Your  
PXI-8461 or PXI-8460 and  
the NI-CAN Software for  
Windows NT  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
September 1999 Edition  
Part Number 322006B-01  
 
Important Information  
Warranty  
The PXI hardware is warranted against defects in materials and workmanship for a period of one year from the date of  
shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment  
that proves to be defective during the warranty period. This warranty includes parts and labor.  
The media on which you receive National Instruments software are warranted not to fail to execute programming instructions,  
due to defects in materials and workmanship, for a period of 90 days from date of shipment, as evidenced by receipts or other  
documentation. National Instruments will, at its option, repair or replace software media that do not execute programming  
instructions if National Instruments receives notice of such defects during the warranty period. National Instruments does not  
warrant that the operation of the software shall be uninterrupted or error free.  
A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside of  
the package before any equipment will be accepted for warranty work. National Instruments will pay the shipping costs of  
returning to the owner parts which are covered by warranty.  
National Instruments believes that the information in this document is accurate. The document has been carefully reviewed  
for technical accuracy. In the event that technical or typographical errors exist, National Instruments reserves the right to  
make changes to subsequent editions of this document without prior notice to holders of this edition. The reader should consult  
National Instruments if errors are suspected. In no event shall National Instruments be liable for any damages arising out of  
or related to this document or the information contained in it.  
EXCEPT AS SPECIFIED HEREIN, NATIONAL INSTRUMENTS MAKES NO WARRANTIES, EXPRESS OR IMPLIED, AND SPECIFICALLY DISCLAIMS ANY  
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS RIGHT TO RECOVER DAMAGES CAUSED BY FAULT  
OR NEGLIGENCE ON THE PART OF NATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER.  
NATIONAL INSTRUMENTS WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA, PROFITS, USE OF PRODUCTS, OR INCIDENTAL  
OR CONSEQUENTIAL DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. This limitation of the liability of National Instruments  
will apply regardless of the form of action, whether in contract or tort, including negligence. Any action against National  
Instruments must be brought within one year after the cause of action accrues. National Instruments shall not be liable for  
any delay in performance due to causes beyond its reasonable control. The warranty provided herein does not cover damages,  
defects, malfunctions, or service failures caused by owner’s failure to follow the National Instruments installation, operation,  
or maintenance instructions; owner’s modification of the product; owner’s abuse, misuse, or negligent acts; and power failure  
or surges, fire, flood, accident, actions of third parties, or other events outside reasonable control.  
Copyright  
Under the copyright laws, this publication may not be reproduced or transmitted in any form, electronic or mechanical,  
including photocopying, recording, storing in an information retrieval system, or translating, in whole or in part, without  
the prior written consent of National Instruments Corporation.  
Trademarks  
BridgeVIEW, CVI, LabVIEW, natinst.com, National Instruments, and NI-CANare trademarks of  
National Instruments Corporation.  
Product and company names mentioned herein are trademarks or trade names of their respective companies.  
WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS  
(1) NATIONAL INSTRUMENTS PRODUCTS ARE NOT DESIGNED WITH COMPONENTS AND TESTING  
FOR A LEVEL OF RELIABILITY SUITABLE FOR USE IN OR IN CONNECTION WITH SURGICAL IMPLANTS  
OR AS CRITICAL COMPONENTS IN ANY LIFE SUPPORT SYSTEMS WHOSE FAILURE TO PERFORM CAN  
REASONABLY BE EXPECTED TO CAUSE SIGNIFICANT INJURY TO A HUMAN.  
(2) IN ANY APPLICATION, INCLUDING THE ABOVE, RELIABILITY OF OPERATION OF THE SOFTWARE  
PRODUCTS CAN BE IMPAIRED BY ADVERSE FACTORS, INCLUDING BUT NOT LIMITED TO FLUCTUATIONS  
IN ELECTRICAL POWER SUPPLY, COMPUTER HARDWARE MALFUNCTIONS, COMPUTER OPERATING  
SYSTEM SOFTWARE FITNESS, FITNESS OF COMPILERS AND DEVELOPMENT SOFTWARE USED TO DEVELOP  
AN APPLICATION, INSTALLATION ERRORS, SOFTWARE AND HARDWARE COMPATIBILITY PROBLEMS,  
MALFUNCTIONS OR FAILURES OF ELECTRONIC MONITORING OR CONTROL DEVICES, TRANSIENT  
FAILURES OF ELECTRONIC SYSTEMS (HARDWARE AND/OR SOFTWARE), UNANTICIPATED USES OR  
MISUSES, OR ERRORS ON THE PART OF THE USER OR APPLICATIONS DESIGNER (ADVERSE FACTORS SUCH  
AS THESE ARE HEREAFTER COLLECTIVELY TERMED “SYSTEM FAILURES”). ANY APPLICATION WHERE A  
SYSTEM FAILURE WOULD CREATE A RISK OF HARM TO PROPERTY OR PERSONS (INCLUDING THE RISK OF  
BODILY INJURY AND DEATH) SHOULD NOT BE RELIANT SOLELY UPON ONE FORM OF ELECTRONIC SYSTEM  
DUE TO THE RISK OF SYSTEM FAILURE. TO AVOID DAMAGE, INJURY, OR DEATH, THE USER OR  
APPLICATION DESIGNER MUST TAKE REASONABLY PRUDENT STEPS TO PROTECT AGAINST SYSTEM  
FAILURES, INCLUDING BUT NOT LIMITED TO BACK-UP OR SHUT DOWN MECHANISMS. BECAUSE EACH  
END-USER SYSTEM IS CUSTOMIZED AND DIFFERS FROM NATIONAL INSTRUMENTS' TESTING PLATFORMS  
AND BECAUSE A USER OR APPLICATION DESIGNER MAY USE NATIONAL INSTRUMENTS PRODUCTS IN  
COMBINATION WITH OTHER PRODUCTS IN A MANNER NOT EVALUATED OR CONTEMPLATED BY  
NATIONAL INSTRUMENTS, THE USER OR APPLICATION DESIGNER IS ULTIMATELY RESPONSIBLE FOR  
VERIFYING AND VALIDATING THE SUITABILITY OF NATIONAL INSTRUMENTS PRODUCTS WHENEVER  
NATIONAL INSTRUMENTS PRODUCTS ARE INCORPORATED IN A SYSTEM OR APPLICATION, INCLUDING,  
WITHOUT LIMITATION, THE APPROPRIATE DESIGN, PROCESS AND SAFETY LEVEL OF SUCH SYSTEM OR  
APPLICATION.  
Compliance  
FCC/DOC Radio Frequency Interference  
Class A Compliance  
This equipment generates and uses radio frequency energy and, if not installed and used in strict accordance  
with the instructions in this manual, may cause interference to radio and television reception. Classification  
requirements are the same for the Federal Communications Commission (FCC) and the Canadian  
Department of Communications (DOC). This equipment has been tested and found to comply with the  
following two regulatory agencies:  
Federal Communications Commission  
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant  
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful  
interference when the equipment is operated in a commercial environment. This equipment generates,  
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction  
manual, may cause harmful interference to radio communications. Operation of this equipment in a  
residential area is likely to cause harmful interference in which case the user will be required to correct the  
interference at his own expense.  
Notices to User: Changes or modifications not expressly approved by National Instruments could void  
the user’s authority to operate the equipment under the FCC Rules.  
This device complies with the FCC rules only if used with shielded interface cables  
of suitable quality and construction. National Instruments used such cables to test  
this device and provides them for sale to the user. The use of inferior or nonshielded  
interface cables could void the user’s authority to operate the equipment under the  
FCC rules.  
If necessary, consult National Instruments or an experienced radio/television technician for additional  
suggestions. The following booklet prepared by the FCC may also be helpful: Interference to Home  
Electronic Entertainment Equipment Handbook. This booklet is available from the U.S. Government  
Printing Office, Washington, DC 20402.  
Canadian Department of Communications  
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment  
Regulations.  
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur  
du Canada.  
How To Use the Manual Set..........................................................................................ix  
Chapter 1  
Introduction  
Hardware Overview.......................................................................................................1-1  
Chapter 2  
Installing for Windows NT 4.0........................................................................2-1  
Install the Hardware.......................................................................................................2-3  
Install Your PXI-8461 or PXI-8460................................................................2-3  
Connect the Cables..........................................................................................2-4  
Configure the NI-CAN Software...................................................................................2-5  
Chapter 3  
Chapter 4  
Begin to Use the NI-CAN Software  
Appendix A  
Uninstalling the Hardware and Software  
Uninstalling the Hardware from Windows NT..............................................................A-1  
Uninstalling the NI-CAN Software from Windows NT................................................A-1  
© National Instruments Corporation  
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PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
Contents  
Bus Power Supply Requirements.................................................................................. B-4  
Cable Specifications...................................................................................................... B-5  
Number of Devices........................................................................................................ B-6  
Cable Specifications...................................................................................................... C-4  
Number of Devices........................................................................................................ C-4  
Determining the Necessary Termination Resistance for Your Board............. C-5  
Diagnostic Utility Failures ............................................................................................ D-1  
Resource Errors............................................................................................... D-1  
Missing Board in Diagnostic Utility ............................................................... D-2  
Hardware Problem Encountered ..................................................................... D-2  
Common Questions ....................................................................................................... D-2  
Appendix E  
Specifications  
Technical Support Resources  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
vi  
Contents  
Glossary  
Figures  
Figure 2-1.  
Add/Remove Programs Properties Dialog Box.....................................2-2  
Figure 2-3.  
PXI-8461 That Is Working Properly.....................................................2-5  
Figure B-1.  
Pinout for 9-Pin D-Sub Connector ........................................................B-1  
Figure C-2.  
Figure C-3.  
Figure C-4.  
Figure C-6.  
PXI-8460 Parts Locator Diagram..........................................................C-2  
Power Source Jumpers ..........................................................................C-3  
Termination Resistor Placement for Low-Speed CAN.........................C-5  
Preparing Lead Wires of Replacement Resistors..................................C-7  
Tables  
Table B-1.  
Table B-2.  
Table B-3.  
Table C-1.  
Table C-2.  
Power Requirements for the CAN Physical Layer for  
Bus-Powered Versions ..........................................................................B-4  
ISO 11898 Specifications for Characteristics of a CAN_H and  
CAN_L Pair of Wires............................................................................B-5  
DeviceNet Cable Length Specifications................................................B-5  
Power Requirements for the Low-Speed CAN Physical Layer for  
Bus-Powered Versions ..........................................................................C-3  
ISO 11519-2 Specifications for Characteristics of a CAN_H and  
CAN_L Pair of Wires............................................................................C-4  
© National Instruments Corporation  
vii  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
About This Manual  
This manual contains instructions to help you install and configure your  
PXI-8461 (one port and two port) or PXI-8460 (one port or two port) and  
the NI-CAN software for Windows NT. This manual uses PXI-8461 or  
PXI-8460 to refer to both the one port and two port versions of the boards.  
This manual assumes that you are already familiar with Windows NT.  
How To Use the Manual Set  
Installation and  
Configuration  
Getting Started  
Manual  
Novice  
Users  
Experienced  
Users  
NI-CAN  
NI-CAN Programmer  
User Manual  
Reference Manual  
Application  
Development  
and Examples  
Function  
and Object  
Descriptions  
Use this getting started manual to install and configure your PXI-8461 or  
PXI-8460 and the NI-CAN software for Windows NT.  
Use the NI-CAN User Manual to learn the basics of CAN and how to  
develop an application program. The user manual also contains debugging  
information and detailed examples.  
© National Instruments Corporation  
ix  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
   
About This Manual  
Use the NI-CAN Programmer Reference Manual for specific information  
about each NI-CAN function and object, including format, parameters, and  
possible errors.  
Conventions  
The following conventions appear in this manual:  
»
The » symbol leads you through nested menu items and dialog box options  
to a final action. The sequence File»Page Setup»Options directs you to  
pull down the File menu, select the Page Setup item, and select Options  
from the last dialog box.  
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 on 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. This font 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, and code excerpts.  
monospace italic  
Italic text in this font denotes text that is a placeholder for a word or value  
that you must supply.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
x
 
About This Manual  
Related Documentation  
The following documents contain information that you may find helpful as  
you read this manual:  
ANSI/ISO Standard 11898-1993, Road Vehicles—Interchange of  
Digital Information—Controller Area Network (CAN) for High-Speed  
Communication  
ANSI/ISO Standard 11519-2-1994, Road Vehicles—Low-Speed  
Serial Data Communication—Part 2: Low-Speed Controller Area  
Network (CAN)  
CAN Specification Version 2.0, 1991, Robert Bosch Gmbh.,  
Postfach 500, D-7000 Stuttgart 1  
CiA Draft Standard 102, Version 2.0, CAN Physical Layer for  
Industrial Applications  
CompactPCI Specification, Revision 2.0, PCI Industrial Computers  
Manufacturers Group  
DeviceNet Specification, Version 2.0, Open DeviceNet Vendor  
Association  
PXI Specification, Revision 1.0, National Instruments Corporation  
© National Instruments Corporation  
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PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
 
1
Introduction  
This chapter lists what you need to get started, provides an overview of the  
PXI hardware and the NI-CAN software for Windows NT, and describes  
optional equipment you can order.  
What You Need to Get Started  
Make sure you have all of the following items before you attempt to install  
the hardware and software:  
Windows NT 3.51 or later installed on your computer  
PXI-8461 one port  
PXI-8461 two port  
PXI-8460 one port  
PXI-8460 two port  
Version 1.3  
(Disk x of 3)  
CAN interface cables that meet the requirements in Appendix B,  
Cabling Requirements for PXI-8461 High-Speed CAN or Appendix C,  
Cabling Requirements for PXI-8460 Low-Speed CAN.  
Hardware Overview  
The PXI-8461 and PXI-8460 (one port and two port) are software  
configurable and compliant with the PXI Specification and CompactPCI  
Specification. With a PXI-8461 or PXI-8460 board, you can make your  
PXI or CompactPCI chassis communicate with and control CAN devices.  
The PXI-8461 physical layer fully conforms to the ISO 11898  
physical layer specification for CAN and is optically isolated to 500 V.  
The PXI-8460 physical layer conforms to the ISO 11519-2 physical layer  
© National Instruments Corporation  
1-1  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
     
Chapter 1  
Introduction  
specification for CAN and is also optically isolated to 500 V. CAN  
interfacing is accomplished using the Intel 82527 CAN controller chip.  
The PXI-8461 supports a wide variety of transfer rates up to 1 Mb/s.  
The PXI-8460 supports rates up to 125 kb/s. The CAN physical layer on the  
PXI-8461 and PXI-8460 can be powered either internally (from the board)  
or externally (from the bus cable power). The power source for the CAN  
physical layer for each port is configured with a jumper.  
PXI-8461 boards are available with two physical connector types:  
DB-9 D-Sub  
Combicon-style pluggable screw terminals  
PXI-8460 boards are available with DB-9 D-Sub connectors.  
The PXI-8461 and PXI-8460 use the Intel 386EX embedded processor  
to implement time-critical features provided by the NI-CAN software.  
The PXI-8461 and PXI-8460 communicate with the NI-CAN driver  
through on-board shared memory and an interrupt.  
NI-CAN Software Overview  
The NI-CAN software includes a native, 32-bit multitasking Windows NT  
kernel driver. The NI-CAN software is fully integrated into the  
Windows NT operating system. You can configure it through the  
Windows NT Control Panel and uninstall it through the Add/Remove  
Programs applet of the Control Panel.  
The NI-CAN software for Windows NT supports the concurrent use of  
multiple CAN boards. For example, you can use both a PXI-8461 and  
PCMCIA-CAN in the same system at the same time.  
The NI-CAN software, along with the PXI hardware, transforms your  
computer into a CAN interface with complete communications and bus  
management capability. The NI-CAN software includes the following  
components:  
Firmware (runs on embedded Intel 386EX)  
Device driver  
Diagnostic test utility  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
1-2  
 
Chapter 1  
Introduction  
Language interface libraries for Microsoft Visual C/C++ 2.0 or later,  
LabWindows/CVI 4.0 or later, and LabVIEW 4.0 or later  
Example programs that use NI-CAN functions  
Optional Programming Tools  
Your kit includes the NI-CAN software for Windows NT. In addition,  
you can order the LabWindows/CVI, LabVIEW, or BridgeVIEW software  
from National Instruments.  
LabWindows/CVI is an interactive ANSI C development environment for  
building test and measurement and instrument control systems. It includes  
interactive code-generation tools and a graphical editor for building custom  
user interfaces. It also includes built-in libraries for IEEE 488.2, VXI,  
RS-232 control, and plug-in data acquisition. When you order  
LabWindows/CVI, you also get hundreds of complete instrument drivers,  
which are modular, source-code programs that handle the communication  
with your instrument so that you do not have to learn the programming  
details.  
LabVIEW is a complete programming environment that departs from the  
sequential nature of traditional programming languages and features a  
graphical programming environment. It includes all the tools needed for  
instrument control, data acquisition, analysis, and presentation. LabVIEW  
also includes an extensive instrument driver library.  
BridgeVIEW is a radical departure from traditional automation software  
that provides a flexible program development system for a variety of  
DeviceNet applications including general manufacturing, test, and control.  
Leveraging National Instruments patented graphical programming  
language G (otherwise known as LabVIEW), BridgeVIEW gives you the  
ability to integrate functionality in a way that is not possible with traditional  
automation software. In addition to the programming advantages of G,  
BridgeVIEW also provides a number of powerful features for the  
development of your industrial automation application: graphical HMI  
(Human Machine Interface); ease of use; fill-in-the-blank configuration  
utilities; HMI G Wizard for simplified HMI development; historical data  
collection and trending; alarm and event reporting and logging; security;  
and connectivity to PLCs and industrial device networks like DeviceNet.  
For more information about LabWindows/CVI , LabVIEW, and  
BridgeVIEW, contact National Instruments.  
© National Instruments Corporation  
1-3  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
 
2
Installation and Configuration  
This chapter describes how to install and configure the NI-CAN software  
for Windows NT and the PXI-8461 or PXI-8460 hardware.  
Install the NI-CAN Software  
Install the NI-CAN software for Windows NT before you install your  
hardware.  
Installation for Windows NT 3.51  
1. Log on as Administratoror as a user with Administrator privileges.  
The NI-CAN setup program must have Administratorprivileges  
because the program modifies the configuration registry of your  
system.  
2. Insert the NI-CAN Software for Windows 95/98/NT (Disk 1 of 3) into  
an unused drive.  
3. In the Run dialog box, type the following:  
x:\setup  
where xis the letter of the drive containing the disk (usually aor b).  
4. Shut down Windows NT and turn off your computer when the setup is  
complete.  
5. Proceed to the section Install the Hardware.  
Installing for Windows NT 4.0  
1. Log on as Administratoror as a user with Administrator privileges.  
The NI-CAN setup program must have Administratorprivileges  
because the program modifies the configuration registry of your  
system.  
2. Select Start»Settings»Control Panel.  
© National Instruments Corporation  
2-1  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
           
Chapter 2  
Installation and Configuration  
3. Double-click on the Add/Remove Programs icon in the Control Panel  
to launch the Add/Remove Programs applet. A dialog box similar to  
the one in Figure 2-1 appears.  
Figure 2-1. Add/Remove Programs Properties Dialog Box  
You can use this same applet to uninstall the NI-CAN software  
at a later time. Refer to Appendix A, Uninstalling the Hardware  
and Software, for more information.  
4. Click on the Install button.  
5. When prompted, insert the NI-CAN Software for Windows 95/98/NT  
(Disk 1 of 3), and click on the Next button to proceed.  
6. The setup wizard guides you through the necessary steps to install  
the NI-CAN software. You may go back and change values where  
appropriate by clicking on the Back button. If at any time you want to  
exit the setup, click on the Cancel button.  
7. Shut down Windows NT and turn off your computer when the setup is  
complete.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
2-2  
   
Chapter 2  
Installation and Configuration  
Install the Hardware  
This section describes how to install your PXI-8461or PXI-8460 hardware.  
Check the Configuration of Your PXI-8461 or PXI-8460  
If you plan to use your CAN board in a system where bus power is  
board. See Appendix B, Cabling Requirements for PXI-8461 High-Speed  
CAN, for more information.  
If you are installing a low-speed CAN board, you may need to change the  
power supply jumpers or termination resistors. See Appendix C, Cabling  
Requirements for PXI-8460 Low-Speed CAN, for more information.  
Install Your PXI-8461 or PXI-8460  
Caution Before you remove the board from the package, touch the antistatic package to a  
metal part of your system chassis to discharge electrostatic energy, which can damage  
several components on your board.  
1. Make sure that your PXI or CompactPCI chassis is turned off. Keep the  
PXI or CompactPCI chassis plugged in so that it remains grounded  
while you install the PXI board.  
2. Choose an unused PXI or CompactPCI 5 V peripheral slot.  
3. Remove the filler panel for the peripheral slot you have chosen.  
4. Touch a metal part on your chassis to discharge any static electricity  
that might be on your clothes or body.  
© National Instruments Corporation  
2-3  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
       
Chapter 2  
Installation and Configuration  
5. Insert the PXI board into the selected 5 V slot. Use the injector/ejector  
handle to fully inject the device into place. Figure 2-2 shows how to  
install the PXI board into a PXI or CompactPCI chassis.  
3
ON  
STANDBY  
1
2
4
5
6
7
8
2
4
1
1
2
Injector/Ejector Handle (In Down Position)  
PXI Board  
3
4
PXI Chassis  
Injector/Ejector Rail  
Figure 2-2. Installing the PXI Hardware  
6. Screw the front panel of the PXI board to the front panel mounting rail  
of the PXI or CompactPCI chassis.  
7. Turn on your PXI or CompactPCI chassis and start Windows NT.  
After you have installed your board, connect the CAN cables to your PXI  
board. Because exact cabling requirements vary for each application,  
National Instruments does not provide cables. Refer to Appendix B,  
Cabling Requirements for PXI-8461 High-Speed CAN, or Appendix C,  
Cabling Requirements for PXI-8460 Low-Speed CAN, for information  
about the cabling requirements of the CAN hardware.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
2-4  
     
Chapter 2  
Installation and Configuration  
Configure the NI-CAN Software  
The NI-CAN Configuration utility is located in the Windows NT Control  
Panel. You can use it to examine or modify the configuration of the  
NI-CAN software. The context-sensitive online help, available by  
right-clicking on any of the controls on the configuration utility buttons,  
includes all the information you need to configure the NI-CAN software.  
To use the NI-CAN Configuration utility, you must first log in as  
Administratoror as a user with Administrator privileges. To configure  
the NI-CAN software, double-click on the NI-CAN Configuration icon in  
the Control Panel:  
Windows NT 4.0 or later—Select Start»Settings»Control Panel.  
Figure 2-3 shows a CAN interface that is working properly. If no interfaces  
are listed under NI-CAN Configuration, refer to the Missing Board in the  
NI-CAN Configuration Utility section in Appendix D, Troubleshooting and  
Common Questions, to resolve the problem.  
Figure 2-3. PXI-8461 That Is Working Properly  
To select a particular interface, click on that interface in the list.  
When you install a PXI-8461 or PXI-8460, your computer automatically  
assigns valid resources to it. Because this resource assignment is automatic,  
you do not need to use the Resources dialog box for the PXI hardware, and  
you do not need to restart Windows NT.  
© National Instruments Corporation  
2-5  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
     
Chapter 2  
Installation and Configuration  
To view information about the NI-CAN software configuration for the  
PXI-8461 or PXI-8460, click on the Settings button. Figure 2-4 shows  
the Settings dialog box.  
Figure 2-4. NI-CAN Hardware Settings Dialog Box  
Each port of the PXI-8461 or PXI-8460 is configured from this tab. Use the  
drop-down box nearest the top of the tab to select the physical port number  
to configure. For each port, use the  
drop-down box to select the name  
Name  
for the CAN Network Interface Object (CAN0, CAN1, and so on). You use  
this name to refer to the physical port from within your NI-CAN  
application.  
Help button. You can also right-click on a specific control and select  
What’s This? from the pop-up menu to see context-sensitive help for the  
item you have clicked on.  
When you have finished configuring the NI-CAN software, proceed to  
Chapter 3, Verify the Installation.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
2-6  
   
3
Verify the Installation  
This chapter describes how to verify the hardware and software  
installation.  
You can use the NI-CAN Diagnostic utility, installed with your NI-CAN  
software, to test the hardware and software installation. The utility verifies  
that your hardware and software are functioning properly and that the  
configuration of your hardware does not conflict with anything else in your  
system.  
To run the utility, select the NI-CAN Diagnostic item:  
NI-CAN Diagnostic  
icon in  
Windows NT 3.51—Double-click on the  
NI-CAN Software Program Manager  
.
the  
Windows NT 4.0 or later—Select  
Instruments CAN»NI-CAN Diagnostic  
group of the  
Start»Programs»National  
.
When you have started the NI-CAN Diagnostic utility, test your CAN  
Test All  
interfaces by clicking on the  
interface by highlighting it and clicking on the  
NI-CAN Diagnostic is successful, it puts a checkmark next to the interface  
Untested Passed  
button. You can also test one CAN  
Test One  
button. If the  
and changes its status from  
to  
fails, it puts an X next to the interface, and changes its status from  
Failed  
. If the NI-CAN Diagnostic  
Untested  
. Figure 3-1 shows the NI-CAN Diagnostic utility after it has  
to  
tested some CAN interfaces.  
Figure 3-1. NI-CAN Diagnostic Utility after Testing  
© National Instruments Corporation  
3-1  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
         
Chapter 3  
Verify the Installation  
You can get details about any tested CAN interface by selecting the  
interface and clicking on the Details button. For each failed CAN interface,  
select it and click on the Details button to get a description of the failure.  
Use that information and the information in Appendix D, Troubleshooting  
and Common Questions, to troubleshoot the problem. Troubleshooting  
information is also available in the online help for the NI-CAN Diagnostic  
utility, which you can access by clicking on the Help button.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
3-2  
4
Begin to Use the  
NI-CAN Software  
This chapter helps you get started with the NI-CAN software for  
Windows NT.  
Using the NI-CAN Software  
The functions provided by the NI-CAN software are similar to those  
provided by many other device drivers. For example, NI-CAN has open,  
close, read, and write functions. NI-CAN provides two different levels of  
access to a CAN network: the CAN Network Interface Object and CAN  
Objects. Both forms of access support timestamping of incoming data and  
various forms of queuing.  
The CAN Network Interface Object provides low-level access to a CAN  
network. Each CAN Network Interface Object maps to a specific CAN  
port, with no limitation on the maximum number of ports or boards you can  
use (for example, two PXI-8461 two-port interfaces would provide CAN0  
through CAN3). You can use this object to transmit and receive entire CAN  
frames. For example, to transmit a CAN frame, you would specify the  
outgoing arbitration ID, frame type (data or remote), data length, and data.  
The CAN Objects provide higher level access to a CAN network. Each  
CAN Object maps to a specific data item (arbitration ID), and you can use  
multiple CAN Objects for a given port. When configuring a CAN Object  
for use, you specify the arbitration ID, direction of data transfer, data  
length, and how you want the data to be accessed (such as periodically).  
For example, you could configure a CAN Object to transmit an outgoing  
data frame for a specific arbitration ID every 100 ms. After opening this  
CAN Object, you use the write function to provide data to transmit, and the  
NI-CAN embedded firmware handles all periodic timing.  
For detailed information about the NI-CAN software and functions, refer  
to the NI-CAN User Manual and the NI-CAN Programmer Reference  
Manual.  
© National Instruments Corporation  
4-1  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
   
Chapter 4  
Begin to Use the NI-CAN Software  
General Programming Considerations  
As you begin developing your Win32 NI-CAN application, remember the  
following points:  
For your LabVIEW or BridgeVIEW application, you must use the  
NI-CAN LabVIEW functions in nican.llb.  
For your C/C++ application, you must include the NI-CAN header file,  
nican.h, in your source code.  
The NI-CAN software is accessed through the 32-bit DLL,  
nican.dll, either by linking with one of the language interfaces  
provided with the NI-CAN software, or by using direct DLL entry  
from other programming environments.  
Several sample CAN applications are included with the NI-CAN  
software. Use these as a guide for your own application development.  
For information about developing your application, refer to the NI-CAN  
User Manual. For detailed information about NI-CAN functions and  
objects, refer to the NI-CAN Programmer Reference Manual.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
4-2  
 
A
Uninstalling the Hardware  
and Software  
This appendix describes how to uninstall the PXI-8461 or PXI-8460  
hardware and the NI-CAN software from Windows NT.  
Uninstalling the Hardware from Windows NT  
Because Windows NT 3.51 and 4.0 do not maintain hardware information  
for the board, you just need to physically remove your PXI hardware from  
your computer. To do so, shut down Windows NT, power off your PXI or  
CompactPCI chassis, remove any cables attached to your board, and  
physically remove the board.  
Uninstalling the NI-CAN Software from Windows NT  
Note The following instructions apply to Windows NT 4.0 only. If you are using Windows  
NT 3.51, refer to the readme.txtfile in your NI-CAN directory for information on how  
to uninstall the NI-CAN software.  
Before uninstalling the NI-CAN software, you should remove the PXI  
boards from your computer, as explained in the previous section.  
© National Instruments Corporation  
A-1  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
         
Appendix A  
Uninstalling the Hardware and Software  
Complete the following steps to remove the NI-CAN software from  
Windows NT 4.0:  
1. Select the Add/Remove Programs icon under Start»Settings»  
Control Panel A dialog box similar to the one in Figure A-1 appears.  
.
This dialog box lists the software available for removal.  
Figure A-1. Add/Remove Programs Properties Dialog Box  
2. Select the NI-CAN software you want to remove and click on the  
Add/Remove button. The uninstall program runs and removes all  
folders, utilities, device drivers, DLLs, and registry entries associated  
with the NI-CAN software.  
The uninstall program removes only items that the installation program  
installation program, the uninstall program does not delete that directory  
because the directory is not empty after the uninstallation. You need to  
remove any remaining components yourself.  
If you want to reinstall the hardware and software, refer to Chapter 2,  
Installation and Configuration.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
A-2  
   
B
Cabling Requirements for  
PXI-8461 High-Speed CAN  
This appendix describes the cabling requirements for the hardware.  
Cables should be constructed to meet these requirements and the  
requirements of the other CAN or DeviceNet devices in the network.  
Connector Pinouts  
Depending on the type of PXI board you are installing, it either has DB-9  
D-Sub connector(s) or Combicon-style pluggable screw terminal  
connector(s).  
The 9-pin D-Sub follows the pinout recommended by CiA Draft  
Standard 102. Figure B-1 shows the pinout for this connector.  
No Connection  
Optional Ground (V–)  
CAN_L  
CAN_H  
V–  
No Connection  
No Connection  
V+  
Shield  
Figure B-1. Pinout for 9-Pin D-Sub Connector  
© National Instruments Corporation  
B-1  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
           
Appendix B  
Cabling Requirements for PXI-8461 High-Speed CAN  
The 5-pin Combicon-style pluggable screw terminal follows the pinout  
required by the DeviceNet Specification. Figure B-2 shows the pinout for  
this connector.  
1
2
3
4
5
Figure B-2. Pinout for 5-Pin Combicon-Style Pluggable Screw Terminal  
CAN_H and CAN_L are signal lines that carry the data on the CAN  
network. These signals should be connected using twisted-pair cable.  
The V+ and V– pins are used to supply bus power to the CAN physical  
layer if external power is required for the CAN physical layer. If internal  
power for the CAN physical layer is used, the V– pin serves as the reference  
ground for CAN_H and CAN_L. See the next section, Power Supply  
Information for the High-Speed CAN Ports, for more information.  
For the PXI-8461, a jumper controls the source of power for the CAN  
physical layer. For the one-port boards and port one of the two-port boards,  
power is configured with jumper J5. For port two of the two-port boards,  
power is configured with jumper J6. The location of these jumpers is shown  
in Figure B-3.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
B-2  
     
Appendix B  
Cabling Requirements for PXI-8461 High-Speed CAN  
3
4
2
1
5
1
2
Power Supply Jumper J6  
Power Supply Jumper J5  
3
4
Assembly Number  
Product Name  
5
Serial Number  
Figure B-3. PXI-8461 Part Locator Diagram  
Connecting pins 1 and 2 of a jumper configures the CAN physical layer to  
be powered externally (from the bus cable power). In this configuration, the  
power must be supplied on the V+ and V– pins on the port connector.  
Connecting pins 2 and 3 of a jumper configures the CAN physical layer to  
be powered internally (from the board). In this configuration, the V– signal  
serves as the reference ground for the isolated signals.  
© National Instruments Corporation  
B-3  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
   
Appendix B  
Cabling Requirements for PXI-8461 High-Speed CAN  
Figure B-4 shows how to configure your jumpers for internal or external  
power supplies.  
INT  
3
EXT  
INT  
3
EXT  
1
2
1
2
a. Internal Power Mode  
b. External Power Mode  
Figure B-4. Power Source Jumpers  
The CAN physical layer is still isolated regardless of the power source  
chosen.  
If the CAN physical layer is powered from a bus power supply, the power  
supply should be a DC power supply with an output of 10 V to 30 V. The  
power requirements for the CAN ports for bus-powered configurations are  
shown in Table B-1. You should take these requirements into account when  
determining requirements of the bus power supply for the system.  
Table B-1. Power Requirements for the CAN Physical Layer for  
Bus-Powered Versions  
Characteristic  
Voltage requirement  
Current requirement  
Specification  
V+ 10 to 30 VDC  
40 mA typical  
100 mA maximum  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
B-4  
       
Appendix B  
Cabling Requirements for PXI-8461 High-Speed CAN  
Cable Specifications  
Cables should meet the physical medium requirements specified in  
ISO 11898, shown in Table B-2.  
Belden cable (3084A) meets all of those requirements and should be  
suitable for most applications.  
Table B-2. ISO 11898 Specifications for Characteristics of a CAN_H and  
CAN_L Pair of Wires  
Characteristic  
Impedance  
Value  
108 minimum, 120 nominal,  
132 maximum  
Length-related resistance  
Specific line delay  
70 m/m nominal  
5 ns/m nominal  
Cable Lengths  
The allowable cable length is affected by the characteristics of the cabling  
and the desired bit transmission rates. Detailed cable length requirements  
can be found in ISO 11898, CiA Draft Standard 102, and the DeviceNet  
Specification.  
ISO 11898 specifies 40 m total cable length with a maximum stub length  
of 0.3 m for a bit rate of 1 Mb/s. The ISO 11898 specification says that  
significantly longer cable lengths may be allowed at lower bit rates, but  
each node should be analyzed for signal integrity problems.  
Table B-3 lists the DeviceNet cable length specifications.  
Table B-3. DeviceNet Cable Length Specifications  
Drop Length  
Maximum  
Drop Length  
Cumulative  
Baud Rate  
500 kb/s  
Trunk Length  
100 m (328 ft)  
250 m (820 ft)  
500 m (1640 ft)  
6 m (20 ft)  
6 m (20 ft)  
6 m (20 ft)  
39 m (128 ft)  
78 m (256 ft)  
250 kb/s  
125 kb/s  
© National Instruments Corporation  
B-5  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
         
Appendix B  
Cabling Requirements for PXI-8461 High-Speed CAN  
Number of Devices  
The maximum number of devices that you can connect to a CAN port  
depends on the electrical characteristics of the devices on the network. If all  
of the devices meet the requirements of ISO 11898, at least 30 devices may  
be connected to the bus. Higher numbers of devices may be connected if the  
electrical characteristics of the devices do not degrade signal quality below  
ISO 11898 signal level specifications. If all of the devices on the network  
meet the DeviceNet specifications, 64 devices may be connected to the  
network.  
Cable Termination  
The pair of signal wires (CAN_H and CAN_L) constitutes a transmission  
line. If the transmission line is not terminated, each signal change on the  
line causes reflections that may cause communication failures.  
Because communication flows both ways on the CAN bus, CAN requires  
that both ends of the cable be terminated. However, this requirement does  
not mean that every device should have a termination resistor. If multiple  
devices are placed along the cable, only the devices on the ends of the cable  
should have termination resistors. See Figure B-5 for an example of where  
termination resistors should be placed in a system with more than two  
devices.  
CAN  
CAN  
CAN  
Device  
Device  
Device  
CAN_H  
CAN_L  
CAN  
Device  
Figure B-5. Termination Resistor Placement  
The termination resistors on a cable should match the nominal impedance  
of the cable. ISO 11898 requires a cable with a nominal impedance of  
120 ; therefore, a 120 resistor should be used at each end of the cable.  
Each termination resistor should be capable of dissipating at least 0.25 W  
of power.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
B-6  
       
Appendix B  
Cabling Requirements for PXI-8461 High-Speed CAN  
Cabling Example  
Figure B-6 shows an example of a cable to connect two CAN devices. For  
the internal power configuration, no V+ connection is required.  
5-Pin  
9-Pin  
9-Pin  
5-Pin  
Combicon  
D-Sub  
D-Sub Combicon  
CAN_H  
CAN_L  
Shield  
V+  
Pin 4  
Pin 2  
Pin 3  
Pin 5  
Pin 1  
Pin 7  
Pin 2  
Pin 5  
Pin 9  
Pin 3  
Pin 7  
Pin 2  
Pin 5  
Pin 9  
Pin 3  
Pin 4  
Pin 2  
Pin 3  
Pin 5  
Pin 1  
120  
120Ω  
V–  
Power  
Connector  
V+  
V–  
Figure B-6. Cabling Example  
© National Instruments Corporation  
B-7  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
     
C
Cabling Requirements for  
PXI-8460 Low-Speed CAN  
This appendix describes the cabling requirements for the PXI-8460  
hardware.  
Cables should be constructed to meet these requirements, as well as the  
requirements of the other CAN devices in the network.  
Connector Pinouts  
The PXI-8460 has DB-9 D-Sub connector(s). The 9-pin D-Sub follows the  
pinout recommended by CiA DS 102. Figure C-1 shows the pinout for this  
connector.  
No Connection  
Optional Ground (V–)  
CAN_L  
CAN_H  
V–  
No Connection  
No Connection  
V+  
Shield  
Figure C-1. Pinout for 9-Pin D-Sub Connector  
© National Instruments Corporation  
C-1  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
           
Appendix C  
Cabling Requirements for PXI-8460 Low-Speed CAN  
CAN_H and CAN_L are signal lines that carry the data on the CAN  
network. These signals should be connected using twisted-pair cable.  
The V+ and V– pins are used to supply bus power to the CAN physical  
layer if external power is required for the CAN physical layer. If internal  
power for the CAN physical layer is used, the V- pin serves as the reference  
ground for CAN_H and CAN_L. See the next section, Power Supply  
Information for the Low-Speed CAN Ports, for more information.  
Power Supply Information for the Low-Speed CAN Ports  
For port one of the PXI-8460, power is configured with jumper J5. For port  
two of the PXI-8460, power is configured with jumper J6. These jumpers  
are shown in Figure C-2.  
3
4
2
1
6
5
1
2
Power Supply Jumper J6  
Power Supply Jumper J5  
3
4
Assembly Number  
Product Name  
5
6
Serial Number  
Termination Resistor Sockets  
Figure C-2. PXI-8460 Parts Locator Diagram  
Connecting pins 1 and 2 of a jumper configures the CAN physical layer to  
be powered externally (from the bus cable power). In this configuration, the  
power must be supplied on the V+ and V– pins on the port connector.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
C-2  
     
Appendix C  
Cabling Requirements for PXI-8460 Low-Speed CAN  
Connecting pins 2 and 3 of a jumper configures the CAN physical layer to  
be powered internally (from the card). In this configuration, the V– signal  
serves as the reference ground for the isolated signals. Even if the CAN  
physical layer is powered internally, the fault-tolerant CAN transceiver still  
requires bus power to be supplied in order for it to monitor the power  
supply (battery) voltage.  
Figure C-3 shows how to configure your jumpers for internal or external  
power supplies.  
INT  
3
EXT  
1
INT  
3
EXT  
1
2
2
a. Internal Power Mode  
b. External Power Mode  
Figure C-3. Power Source Jumpers  
The CAN physical layer is still isolated regardless of the power source  
chosen.  
If the CAN physical layer is powered from a bus power supply, the power  
supply should be a DC power supply with an output of 8 V to 27V. The  
power requirements for the CAN ports for Bus-Powered configurations are  
shown in Table C-1. You should take these requirements into account when  
determining requirements of the bus power supply for the system.  
Table C-1. Power Requirements for the Low-Speed CAN Physical Layer for  
Bus-Powered Versions  
Characteristic  
Voltage requirement  
Current requirement  
Specification  
V+ 8–27 VDC  
40 mA typical  
100 mA maximum  
© National Instruments Corporation  
C-3  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
       
Appendix C  
Cabling Requirements for PXI-8460 Low-Speed CAN  
Cable Specifications  
Cables should meet the physical medium requirements specified in  
ISO 11519-2, shown in Table C-2.  
Belden cable (3084A) meets all of those requirements, and should be  
suitable for most applications.  
Table C-2. ISO 11519-2 Specifications for Characteristics of a CAN_H and  
CAN_L Pair of Wires  
Characteristic  
Value  
90 m/m nominal  
30 pF/m nominal  
Length-related resistance  
Length-related capacitance:  
CAN_L and ground, CAN_H and  
ground, CAN_L and CAN_H  
Number of Devices  
The maximum number of devices depends on the electrical characteristics  
of the devices on the network. If all of the devices meet the requirements  
of ISO 11519-2, at least 20 devices may be connected to the bus. Higher  
numbers of devices may be connected if the electrical characteristics of  
the devices do not degrade signal quality below ISO 11519-2 signal level  
specifications.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
C-4  
       
Appendix C  
Cabling Requirements for PXI-8460 Low-Speed CAN  
Low-Speed Termination  
Every device on the low-speed CAN network requires a termination  
resistor for each CAN data line: RRTH for CAN_H and RRTL for CAN_L.  
Figure C-4 shows termination resistor placement in a low-speed CAN  
network.  
Low-speed  
Low-speed  
Low-speed  
CAN Device  
CAN Device  
CAN Device  
RTL CAN_L  
RTH CAN_H  
RTL CAN_L  
RTH CAN_H  
RTL CAN_L  
RTH CAN_H  
CAN_H  
CAN_L  
Figure C-4. Termination Resistor Placement for Low-Speed CAN  
The following sections explain how to determine the correct resistor values  
for your PXI-8460, and how to replace those resistors, if necessary.  
Determining the Necessary Termination Resistance for Your Board  
Unlike high-speed CAN, low-speed CAN requires termination at the  
low-speed CAN transceiver instead of on the cable. The termination  
requires one resistor for each CAN line. This configuration allows the  
Philips fault-tolerant CAN transceiver to detect any of seven network  
faults. You can use your PXI-8460 to connect to a low-speed CAN network  
having from two to 32 nodes as specified by Philips (including the port on  
the PXI-8460 as a node). You can also use the PXI-8460 to communicate  
with individual low-speed CAN devices. It is important to determine the  
overall termination of your existing network, or the termination of your  
individual device, before connecting it to a PXI-8460 port. Philips  
recommends an overall RTH and RTL termination of 100 to 500 (each)  
for a properly terminated low-speed network. The overall network  
termination may be determined as follows:  
1
1
1
1
1
------------------------- = ------------------------ + ------------------------ + ------------------------ + -------------------------------  
RRTH overallRRTH node 1 RRTH node 2 RRTH node 3 RRTH or node n...  
© National Instruments Corporation  
C-5  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
       
Appendix C  
Cabling Requirements for PXI-8460 Low-Speed CAN  
Philips also recommends an individual device RTH and RTL termination of  
500 to 16 k. The PXI-8460 board ships with mounted RTH and RTL  
values of 510 ±5% per port. The PXI-8460 kit also includes a pair of  
15 k±5% resistors for each port. After determining the termination of  
your existing network or device, you can use the following formula to  
indicate which value should be placed on your PXI-8460 board in order to  
produce the proper overall RTH and RTL termination of 100 to 500 upon  
connection of the board:  
1
RRTH overall*= -------------------------------------------------------------------------------------------------------------------------------------------  
1
1
---------------------------------------------------------------- + -------------------------------------------------------------  
RRTH of low-speed CAN interface** RRTH of existing network or device  
*RRTH overall should be between 100 and 500 Ω  
**RRTH of low-speed CAN interface= 510 ±5% (mounted) or 15 k±5% (in kit)  
RRTH = RRTL  
As the formula indicates, the 510 ±5% shipped on your board will work  
with properly terminated networks having a total RTH and RTL  
termination of 125 to 500 , or individual devices having an RTH and RTL  
termination of 500 to 16 k. For communication with a network having  
an overall RTH and RTL termination of 100 to 125 , you will need to  
replace the 510 resistors with the 15 kresistors in the kit. Please refer  
to the next section, Replacing the Termination Resistors.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
C-6  
Replacing the Termination Resistors  
Follow these steps to replace the termination resistors, after you have  
determined the correct value in the previous section, Determining the  
Necessary Termination Resistance for Your Board.  
1. Remove the termination resistors on your PXI-8460. Figure C-5 shows  
the location of the termination resistor sockets on a PXI-8460.  
1
2
1
Port 1 Termination Resistors  
2
Port 2 Termination Resistors  
Figure C-5. Location of Termination Resistors on a PXI-8460  
2. Cut and bend the lead wires of the resistors you want to install. Refer  
to Figure C-6.  
0.5 in  
(13 mm)  
0.165 in  
(4 mm)  
Figure C-6. Preparing Lead Wires of Replacement Resistors  
© National Instruments Corporation  
C-7  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
       
Appendix C  
Cabling Requirements for PXI-8460 Low-Speed CAN  
3. Insert the replacement resistors into the empty sockets.  
4. Refer to Install the Hardware, in Chapter 2, Installation and  
Configuration, to complete the hardware installation.  
Cabling Example  
Figure C-7 shows an example of a cable to connect two low-speed CAN  
devices. For the internal power configuration, the V+ connection is  
required for the low-speed transceiver to operate as specified in the Philips  
data sheet.  
5-Pin  
9-Pin  
9-Pin  
5-Pin  
Combicon  
D-Sub  
D-Sub  
Combicon  
CAN_H  
CAN_L  
GND  
V+  
Pin 4  
Pin 2  
Pin 3  
Pin 5  
Pin 1  
Pin 7  
Pin 2  
Pin 5  
Pin 9  
Pin 3  
Pin 7  
Pin 2  
Pin 5  
Pin 9  
Pin 3  
Pin 4  
Pin 2  
Pin 3  
Pin 5  
Pin 1  
V–  
Power  
Connector  
V+  
V–  
Figure C-7. Cabling Example  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
C-8  
     
D
Troubleshooting and  
Common Questions  
This appendix describes how to troubleshoot problems and answers some  
common questions.  
Missing Board in the NI-CAN Configuration Utility  
The NI-CAN Configuration utility contains configuration information for  
all of the CAN hardware it is aware of that is installed in your system. To  
start the NI-CAN Configuration utility, double-click on the NI-CAN  
Configuration icon in the Control Panel:  
Windows NT 3.51–Open the Control Panel in the Main group of  
the Program Manager.  
Windows NT 4.0 or later–Select Start»Settings»Control Panel.  
If your board is not listed under NI-CAN Configuration, the board is not  
properly installed. For the PXI-8461 or PXI-8460, this means that the board  
is not physically present in the system. If your board is firmly plugged into  
its slot and the problem persists, contact National Instruments.  
Diagnostic Utility Failures  
The following sections explain common error messages generated by the  
NI-CAN Diagnostic utility.  
Resource Errors  
This error occurs if the memory resource or interrupt resource assigned to  
a board conflicts with the resources being used by other hardware in the  
system. If a resource error occurs, click on the Resources button in the  
NI-CAN Configuration utility to view the board resources. For the  
PXI-8461 or PXI-8460, if legacy hardware in your system is using the  
resources, change the resource configuration of the legacy hardware. If you  
need help, refer to the documentation that came with your hardware. If the  
problem persists, contact National Instruments.  
© National Instruments Corporation  
D-1  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
             
Appendix D  
Troubleshooting and Common Questions  
NI-CAN Software Problem Encountered  
This error occurs if the NI-CAN Diagnostic utility detects that it is unable  
to communicate correctly with the hardware using the installed NI-CAN  
software. If you get this error, shut down your computer, restart it, and run  
the NI-CAN Diagnostic utility again. If the problem persists, try  
reinstalling the NI-CAN software for Windows NT.  
Missing Board in Diagnostic Utility  
If your board is physically installed in your system, but is not listed in the  
NI-CAN Diagnostic utility, check to see if the NI-CAN Configuration  
utility has detected the board. For more information, refer to the Missing  
Board in the NI-CAN Configuration Utility section earlier in this appendix.  
Hardware Problem Encountered  
This error occurs if the NI-CAN Diagnostic utility detects a defect in the  
hardware. If you get this error, write down the numeric code shown with the  
error and contact National Instruments. Depending on the cause of the  
hardware failure, you may need to repair or replace your board.  
Common Questions  
How can I determine which type of CAN hardware I have installed?  
Run the NI-CAN Configuration utility. To run the utility, select  
Start»Settings»Control Panel»NI-CAN Configuration. If any hardware  
is correctly installed, it is listed under National Instruments CAN  
Interfaces.  
How can I determine which version of the NI-CAN software I have  
installed?  
Run the NI-CAN Diagnostic utility. To run the utility, select the NI-CAN  
Diagnostic item under Start»Programs»National Instruments CAN.  
The NI-CAN Diagnostic utility displays information about the version of  
the NI-CAN software currently installed.  
How many PXI-8461 or PXI-8460 boards can I configure for use with  
my NI-CAN software?  
The NI-CAN software for Windows NT can be configured to communicate  
with up to 10 boards.  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
D-2  
       
How do I connect a CAN cable to my CAN port?  
You will need to use an appropriate cable. For information about cabling  
requirements for National Instruments CAN hardware, refer to  
Appendix B, Cabling Requirements for PXI-8461 High-Speed CAN or  
Appendix C, Cabling Requirements for PXI-8460 Low-Speed CAN.  
Are interrupts required for the PXI-8461 and PXI-8460?  
Yes, one interrupt per board is required.  
What do I do if the NI-CAN Diagnostic utility fails with an error?  
Refer to the Diagnostic Utility Failures section in this appendix for specific  
information about what might cause the NI-CAN Diagnostic utility to fail.  
If you have already completed the troubleshooting steps, contact National  
Instruments.  
How do I use an NI-CAN language interface?  
For information about using NI-CAN language interfaces, refer to  
Chapter 3, Developing Your Application, in the NI-CAN User Manual.  
How do I use NI-CAN from within LabVIEW or BridgeVIEW?  
For information about using NI-CAN from within LabVIEW or  
BridgeVIEW, refer to Chapter 3, Developing Your Application, in the  
NI-CAN User Manual.  
Why does the uninstall program leave some components installed?  
The uninstall program removes only items that the installation program  
installed. If you add anything to a directory that was created by the  
installation program, the uninstall program does not delete that directory  
because the directory is not empty after the uninstallation. You must  
remove any remaining components yourself.  
© National Instruments Corporation  
D-3  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
E
Specifications  
This appendix describes the physical characteristics of the hardware and  
the recommended operating conditions.  
PXI-8461 One Port and Two Port  
Dimensions............................................. PXI 3U Module  
100 by 160 mm  
(3.94 by 6.30 in.)  
Power requirement ................................. +5 VDC 500 mA typical  
I/O connector.......................................... 9-pin D-Sub for each port  
(standard)  
or  
5-pin Combicon-style pluggable  
DeviceNet screw terminal  
Operating environment  
Component temperature.................. 0 to 55 °C  
Relative humidity............................ 10% to 90%, noncondensing  
Storage environment  
Temperature.................................... –20 to 70 °C  
Relative humidity............................ 10% to 90%, noncondensing  
PXI-8460 One Port and Two Port  
Dimensions............................................. PXI 3U Module  
100 by 160 mm  
(3.94 by 6.30 in.)  
Power requirement ................................. +5 VDC 500 mA typical  
I/O connector.......................................... 9-pin D-Sub for each port  
© National Instruments Corporation  
E-1  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
 
Appendix E  
Specifications  
Operating environment  
Component temperature ..................0 to 55 °C  
Relative humidity ............................10% to 90%, noncondensing  
Storage environment  
Temperature.....................................–20 to 70 °C  
Relative humidity ............................10% to 90%, noncondensing  
High-Speed CAN Port Characteristics for Bus-Powered Ports  
Power requirement..................................10–30 V, 40 mA typical  
100 mA maximum  
Isolation ..................................................500 VDC optical  
Low-Speed CAN Port Characteristics for Bus-Powered Ports  
Power requirement..................................8–27 V, 40 mA typical  
100 mA maximum  
Isolation ..................................................500 VDC optical  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
E-2  
F
Technical Support Resources  
This appendix describes the comprehensive resources available to you in  
the Technical Support section of the National Instruments Web site and  
provides technical support telephone numbers for you to use if you have  
trouble connecting to our Web site or if you do not have internet access.  
NI Web Support  
To provide you with immediate answers and solutions 24 hours a day,  
365 days a year, National Instruments maintains extensive online technical  
support resources. They are available to you at no cost, are updated daily,  
and can be found in the Technical Support section of our Web site at  
Online Problem-Solving and Diagnostic Resources  
KnowledgeBase—A searchable database containing thousands of  
frequently asked questions (FAQs) and their corresponding answers or  
solutions, including special sections devoted to our newest products.  
The database is updated daily in response to new customer experiences  
and feedback.  
Troubleshooting Wizards—Step-by-step guides lead you through  
common problems and answer questions about our entire product line.  
Wizards include screen shots that illustrate the steps being described  
and provide detailed information ranging from simple getting started  
instructions to advanced topics.  
Product Manuals—A comprehensive, searchable library of the latest  
editions of National Instruments hardware and software product  
manuals.  
Hardware Reference Database—A searchable database containing  
brief hardware descriptions, mechanical drawings, and helpful images  
of jumper settings and connector pinouts.  
Application Notes—A library with more than 100 short papers  
addressing specific topics such as creating and calling DLLs,  
developing your own instrument driver software, and porting  
applications between platforms and operating systems.  
© National Instruments Corporation  
F-1  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
 
Appendix F  
Technical Support Resources  
Software-Related Resources  
Instrument Driver Network—A library with hundreds of instrument  
drivers for control of standalone instruments via GPIB, VXI, or serial  
interfaces. You also can submit a request for a particular instrument  
driver if it does not already appear in the library.  
Example Programs Database—A database with numerous,  
non-shipping example programs for National Instruments  
programming environments. You can use them to complement the  
example programs that are already included with National Instruments  
products.  
Software Library—A library with updates and patches to application  
software, links to the latest versions of driver software for National  
Instruments hardware products, and utility routines.  
Worldwide Support  
National Instruments has offices located around the globe. Many branch  
offices maintain a Web site to provide information on local services. You  
can access these Web sites from www.natinst.com/worldwide.  
If you have trouble connecting to our Web site, please contact your local  
National Instruments office or the source from which you purchased your  
National Instruments product(s) to obtain support.  
For telephone support in the United States, dial 512 795 8248. For  
telephone support outside the United States, contact your local branch  
office:  
Australia 03 9879 5166, Austria 0662 45 79 90 0, Belgium 02 757 00 20,  
Brazil 011 284 5011, Canada (Calgary) 403 274 9391,  
Canada (Ontario) 905 785 0085, Canada (Québec) 514 694 8521,  
China 0755 3904939, Denmark 45 76 26 00, Finland 09 725 725 11,  
France 01 48 14 24 24, Germany 089 741 31 30, Greece 30 1 42 96 427  
Hong Kong 2645 3186, India 91805275406, Israel 03 6120092,  
Italy 02 413091, Japan 03 5472 2970, Korea 02 596 7456,  
Mexico (D.F.) 5 280 7625, Mexico (Monterrey) 8 357 7695,  
Netherlands 0348 433466, Norway 32 27 73 00, Singapore 2265886,  
Spain (Barcelona) 93 582 0251, Spain (Madrid) 91 640 0085,  
Sweden 08 587 895 00, Switzerland 056 200 51 51,  
Taiwan 02 2377 1200, United Kingdom 01635 523545  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
F-2  
Glossary  
Prefix  
n-  
Meaning  
nano-  
Value  
10–9  
10–3  
103  
m-  
milli-  
k-  
kilo-  
M-  
mega-  
106  
°
degrees  
ohms  
%
percent  
amperes  
A
ANSI  
b
American National Standards Institute  
bits  
B
bytes  
C
Celsius  
CAN  
CiA  
DC  
DLL  
FCC  
ft  
Controller Area Network  
CAN in Automation  
direct current  
dynamic link library  
Federal Communications Commission  
feet  
HMI  
Hz  
Human Machine Interface  
hertz  
IEEE  
in.  
Institute of Electrical and Electronic Engineers  
inches  
IRQ  
interrupt request  
© National Instruments Corporation  
G-1  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
 
Glossary  
ISO  
International Standards Organization  
light-emitting diode  
LED  
m
meters  
PC  
personal computer  
PCI  
peripheral component interconnect  
Personal Computer Memory Card International Association  
Programmable Logic Controller  
random-access memory  
PCMCIA  
PLC  
RAM  
resource  
hardware settings used by National Instruments CAN hardware, including  
an interrupt request level (IRQ) and an 8 KB physical memory range (such  
as D0000 to D1FFF hex)  
s
seconds  
V
volts  
VDC  
VXI  
W
volts direct current  
VME eXtensions for Instrumentation  
watts  
PXI-8461 or PXI-8460 and NI-CAN for Windows NT  
G-2  

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