National Instruments GPIB-232CT Manuale utente

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GPIB-232CT

User Manual

MicroGPIB®

RS-232 to IEEE-488 Controller

July 1992 Edition

Part Number 320114-01

National Instruments Corporate Headquarters

6504 Bridge Point Parkway

Austin, TX 78730-5039

(512) 794-0100

(800) IEEE-488 (toll-free U.S. and Canada)

Technical support fax: (512) 794-5678

Branch Offices:

Australia 03 879 9422, Belgium 02 757 00 20, Canada 519 622 9310,

Denmark 45 76 73 22, France 1 48 65 33 70, Germany 089 714 5093,

Italy 02 48301892, Japan 03 3788 1921, Netherlands 01720 45761,

Norway 03 846866, Spain 91 896 0675, Sweden 08 984970,

Switzerland 056 45 58 80, U.K. 0635 523 545

MicroGPIB Products

National Instruments has developed the MicroGPIB product line to offer a

series of high performance, low cost IEEE-488 support items, packaged in

small all-metal cases, capable of being rack mounted.

Limited Warranty

The GPIB-232CT is warranted against defects in materials and

workmanship for a period of two years 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.

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 manual 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.CUSTOMER'S 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.

Under the copyright laws, this book may not be copied, photocopied,

reproduced, or translated, in whole or in part, without the prior written

consent of National Instruments Corporation.

Trademarks

MicroGPIB® is a trademark of National Instruments Corporation.

Product names listed are trademarks of their respective manufacturers.

Company names listed are trademarks or trade names of their respective

companies.

FCC/DOC Radio Frequency Interference 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. This equipment

has been tested and found to comply with (1) the limits for a Class A

computing device, in accordance with the specifications in Subpart J of Part

15 of U.S. Federal Communications Commission (FCC) Rules, and (2) the

limits for radio noise emissions from digital apparatus set out in the Radio

Interference Regulations of the Canadian Department of Communication

(DOC). These regulations are designed to provide reasonable protection

against interference from the equipment to radio and television reception in

commercial areas.

There is no guarantee that interference will not occur in a particular

installation. However, the chances of interference are much less if the

equipment is used according to this instruction manual.

If the equipment does cause interference to radio or television reception,

which can be determined by turning the equipment on and off, one or more

of the following suggestions may reduce or eliminate the problem.

• Operate the equipment and the receiver on different branches of your

AC electrical system.

• Move the equipment away from the receiver with which it is

interfering.

• Relocate the equipment with respect to the receiver.

• Reorient the receiver's antenna.

• Be sure that the equipment is plugged into a grounded outlet and that

the grounding has not been defeated with a cheater plug.

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: How to Identify and

Resolve Radio-TV Interference Problems. This booklet is available from

the U.S. Government Printing Office, Washington, DC 20402, Stock

Number 004-000-00345-4.

Preface

The GPIB-232CT User Manual describes the features, functions, and

operation of the Product. The GPIB-232CT is one of National Instruments

family of MicroGPIB products. These products are high-performance, low-

cost IEEE-488 support items, packaged in small all-metal cases, capable of

being rackmounted.

Organization of the GPIB-232CT User Manual

The GPIB-232CT User Manual is organized as follows:

Chapter 1, Description of the GPIB-232CT, contains general information

about the National Instruments GPIB-232CT, the IEEE-488 bus, and the

RS-232 port. This chapter also lists all components and accessories as well

as provides electrical, environmental, and physical specifications.

Chapter 2, The GPIB-232CT Modes of Operation, explains the two modes

of operation of the GPIB-232CT.

Chapter 3, Installation and Configuration in S Mode, contains the S mode

installation and configuration steps.

Chapter 4, Programming in S Mode, explains how to program the

GPIB-232CT when operating in S mode.

Chapter 5, S Mode Functions, gives a detailed description of each S mode

function. The functions are arranged in alphabetical order and each

contains the syntax, purpose, and examples.

Chapter 6, Installation and Configuration in G Mode, contains the G mode

installation and configuration steps.

Chapter 7, Programming in G Mode, explains how to program the

GPIB-232CT when operating in G mode.

Chapter 8, G Mode Functions, gives a detailed description of each G mode

function. The functions are arranged in alphabetical order and each

contains the syntax, purpose, and examples.

Preface

GPIB-232CT User Manual viii © National Instruments Corp.

Appendix A, Multiline Interface Messages, contains an ASCII chart, and a

list of the corresponding GPIB messages.

Appendix B, Status Information, contains explanations of status bits, GPIB

error codes, and serial port error codes.

Appendix C, The Serial Connection, explains the RS-232 serial standard

and contains information for building a serial cable.

Appendix D, Operation of the GPIB, describes the operation of the GPIB.

Appendix E, Common Questions, provides answers to common questions

that frequently arise.

Appendix F, Parallel Polling, explains the use and operation of Parallel

Polls.

Appendix G, Setting Switches, gives additional details about setting

switches on the GPIB-232CT.

Appendix H, Sample Programs, provides some S mode and G mode sample

programs.

Conventions Used in This Manual

Throughout this manual, the following conventions are used to distinguish

elements of text:

italic Italic text denotes emphasis, a cross reference, or

an introduction to a key concept.

monospace Text in this font denotes text or characters that

are to be literally input from the keyboard,

sections of code, programming examples, syntax

examples, and names of variables.

boldface Bold text in this manual denotes a signal name, a

front panel LED indicator, or onscreen module

responses.

Preface

<> Angle brackets enclose the ASCII character

symbols for certain keystrokes. For example,

<CR> for carriage return and <LF> for linefeed.

Abbreviations

The following abbreviations are units of measure that are used in the text of

this manual.

A ampere

C Celsius

° degree

> greater than

• greater than or equal to

hex hexadecimal

Hz hertz

in. inch

K 1,024

kbytes/sec 1000 bytes per second

< less than

• less than or equal to

m meter

M 1,048,576

Mbytes/sec 1,000,000 bytes per second

mA milliampere

mm millimeter

oz. ounce

% percent

sec second

V volt

VAC volts alternating current

VDC volts direct current

Preface

GPIB-232CT User Manual x © National Instruments Corp.

Customer Communication

We appreciate communicating with the people who use our products. If

you encounter any technical problems, you can use the following toll-free

number between the hours of 8:00 a.m. and 5:30 p.m. (central time) to

reach the National Instruments applications engineering department:

(512) 794-0100

(800) IEEE-488 (toll-free U.S. and Canada)

For your documentation comments, we have included a User Comment

Form at the back of the manual. Please mail it to the address printed at the

bottom of the form.

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