IEC 60488-2:2004

Standard digital interface for programmable instrumentation - Part 2: Codes, formats, protocols and common commands

This Dual Logo International Standard is the result of an agreement between the IEC and the Institute of Electrical and Electronics Engineers, Inc. (IEEE). The original IEEE Standard was submitted to the IEC for consideration under the agreement, and the resulting IEC/IEEE Dual Logo International Standard has been published in accordance with the ISO/IEC Directives. It specifies a set of codes to be used by devices connected via the IEEE 488.1 bus, defines communication protocols necessary to effect applications implementation independent device-dependent message exchanges and further defines common commands and characteristics useful in instrument system applications

General Information

• Status: Published
• Publication Date: 06-May-2004
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: SC 65C - Industrial networks
• Current Stage: WPUB - Publication withdrawn
• Start Date: 31-Oct-2024
• Completion Date: 31-Oct-2024

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 60488-2
First edition
2004-05
™
IEEE 488.2
Standard digital interface for programmable
instrumentation –
Part 2:
Codes, formats, protocols
and common commands
Reference number
IEC 60488-2(E):2004
IEEE Std. 488.2(E):1992
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
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edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
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INTERNATIONAL IEC
STANDARD 60488-2
First edition
2004-05
™
IEEE 488.2
Standard digital interface for programmable
instrumentation –
Part 2:
Codes, formats, protocols
and common commands
© IEEE 2004 ⎯ Copyright - all rights reserved
IEEE is a registered trademark in the U.S. Patent & Trademark Office, owned by the Institute of Electrical and Electronics Engineers, Inc.
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
The Institute of Electrical and Electronics Engineers, Inc, 3 Park Avenue, New York, NY 10016-5997, USA
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.standards.ieee.org
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия

– 2 – IEC 60488-2:2004(E)
IEEE 488.2-1992(E)
CONTENTS
Foreword .6

1. Introduction.10

1.1 Scope.10
1.2 Objectives.11
1.3 Notation.11

2. References.11

3. System Considerations.12

3.1 Definitions.12
3.2 System Message Traffic.13
3.3 Functional Layers .14

4. Device Compliance Criteria .15

4.1 IEEE 488.1 Requirements.16
4.2 Message Exchange Requirements .16
4.3 Syntax Requirements.16
4.4 Status Reporting Requirements .18
4.5 Common Commands.21
4.6 Synchronization Requirements .24
4.7 System Configuration Capability.24
4.8 Controller Capability.25
4.9 Device Documentation Requirements .25

5. Device Interface Function Requirements.26

5.1 Handshake Requirements. 26
5.2 Address Requirements .27
5.3 Talker Requirements.27
5.4 Listener Requirements .27
5.5 Service Request Requirements .28
5.6 Remote/Local Requirements.28
5.7 Parallel Poll Requirements.30
5.8 Device Clear Requirements .31
5.9 Device Trigger Requirements.31
5.10 Controller Function Requirements.31
5.11 Electrical Requirements.31
5.12 Power-On Requirements.32

6. Message Exchange Control Protocol .33

6.1 Functional Elements.33
6.2 Protocol Overview .45
6.3 Message Exchange Control Operation .47
6.4 Protocol Rules .52
6.5 Protocol Exceptions .55

7. Device Listening Formats.57

7.1 Overview .57
7.2 Notation.58
7.3 Terminated Program Messages – Functional Syntax .61

Published by IEC under licence from IEEE. © 1992 IEEE. All rights reserved.

IEEE 488.2-1992(E)
7.4 Separator Functional Elements.65
7.5 .67
7.6 Program Header Functional Elements.67
7.7  Functional Elements.72

8. Device Talking Elements.87

8.1 Overview.87
8.2 Notation.88
8.3 Terminated Response Messages – Functional Syntax .88
8.4 Separator Functional Elements .92
8.5  .93
8.6 .94
8.7  Functional Elements.95

9. Message Data Coding .106

9.1 ASCII 7 bit Codes .107
9.2 Binary 8 Bit Integer Codes .109
9.3 Binary Floating Point Code .110

10. Common Commands and Queries.113

10.1 *AAD, Accept Address Command.116
10.2 *CAL?, Calibration Query.116
10.3 *CLS, Clear Status Command.117
10.4 *DDT, Define Device Trigger Command .118
10.5 *DDT?, Define Device Trigger Query .119
10.6 *DLF, Disable Listener Function Command .120
10.7 *DMC, Define Macro Command .120
10.8 *EMC, Enable Macro Command.123
10.9 *EMC?, Enable Macro Query.124
10.10 *ESE, Standard Event Status Enable Command .125
10.11 *ESE?, Standard Event Status Enable Query .125
10.12 *ESR?, Standard Event Status Register Query.126
10.13 *GMC?, Get Macro Contents Query.126
10.14 *IDN?., Identification Query.127
10.15 *IST?, Individual Status Query .129
10.16 *LMC?, Learn Macro Query .129
10.17 *LRN?, Learn Device Setup Query .130
10.18 *OPC, Operation Complete Command.131
10.19 *OPC?, Operation Complete Query.131
10.20 *OPT?, Option Identification Query.132
10.21 *PCB, Pass Control Back.133
10.22 *PMC, Purge Macros Command .134
10.23 *PRE, Parallel Poll Enable Register Command .134
10.24 *PRE?, Parallel Poll Enable Register Query .135
10.25 *PSC, Power-On Status Clear Command.136
10.26 *PSC?, Power-On Status Clear Query .137
10.27 *PUD, Protected User Data Command .137
10.28 *PUD?, Protected User Data Query.138
10.29 *RCL, Recall Command .139
10.30 *RDT, Resource Description Transfer Command .140
Published by IEC under licence from IEEE. © 1992 IEEE. All rights reserved.

– 4 – IEC 60488-2:2004(E)
IEEE 488.2-1992(E)
10.31 *RDT?, Resource Description Transfer Query.141
10.32 *RST, Reset Command .142
10.33 *SAV, Save Command.143
10.34 *SRE, Service Request Enable Command.143
10.35 *SRE?, Service Request Enable Query.144
10.36 *STB?, Read Status Byte Query .145
10.37 *TRG, Trigger Command .145
10.38 *TST?, Self-Test Query.146
10.39 *WAI, Wait-to-Continue Command.147
10.40 *RMC, Remove Individual Macro Command.147
10.41 *SDS, Save Default Device Settings Command.148

11. Device Status Reporting .149

11.1 Overview.149
11.2 Status Byte Register .150
11.3 Service Request Enabling .155
11.4 Status Data Structures .161
11.5 Standard Status Data Structure.166
11.6 Parallel Poll Response Handling.173

12. Device/Controller Synchronization Techniques .174

12.1 Overview.174
12.2 Sequential and Overlapped Commands.175
12.3 Pending-Operation Flag.176
12.4 No-Operation-Pending Flag.176
12.5 Controller/Device Synchronization Commands.176
12.6 Synchronization With External-Control-Signals.180
12.7 Improper Usage of *OPC and *OPC?.181
12.8 Design Considerations.182

13. Automatic System Configuration .184

13.1 Introduction.184
13.2 Overview.185
13.3 Generic Approach to Automatic System Configuration .186
13.4 Detailed Requirements of the Auto Configuration Commands .191
13.5 Additional Automatic Configuration Techniques .197
13.6 Examples.197

14. Controller Compliance Criteria .197

14.1 IEEE 488.1 Requirements.197
14.2 Message Exchange Requirements .198
14.3 Protocols.198
14.4 Functional Element Handling.200
14.5 Controller Specification Requirements.200

15. I IEEE 488.2 Controller Requirements.200

15.1 Controller Interface Function Requirements .200
15.2 Additional IEEE 488.2 Controller Requirements.201
15.3 IEEE 488.2 Controller Recommendations .202

Published by IEC under licence from IEEE. © 1992 IEEE. All rights reserved.

IEEE 488.2-1992(E)
16. Controller Message Exchange Protocols.202

16.1 Definitions.203
16.2 Control Sequences.205

17. Common Controller Protocols .213

17.1 Reset Protocol.214
17.2 Find Device Requesting Service Protocol.215
17.3 Serial Poll All Devices Protocol .216
17.4 Pass Control Protocol.218
17.5 Requesting Control.219
17.6 Find Listeners Protocol .220
17.7 Set Address Protocol.221
17.8 Test System Protocol.226

Annex A Compound Headers – Usage and Examples (Informative) .228

Annex B Device/Controller Synchronization Techniques (Informative) .232

Annex C Automatic System Configuration Example (Informative).244

Annex D Reset Guidelines (Informative) .250

Annex E List of Participants (Informative) .256

Published by IEC under licence from IEEE. © 1992 IEEE. All rights reserved.

– 6 – IEC 60488-2:2004(E)
IEEE 488.2-1992(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
STANDARD DIGITAL INTERFACE
FOR PROGRAMMABLE INSTRUMENTATION –
Part 2: Codes, formats, protocols and common commands

FOREWORD
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6) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights.
IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC/IEEE 60488-2 has been processed through subcommittee 65C: Digital
communications, of IEC technical committee 65: Industrial-process measurement and control.
This standard cancels and replaces the second edition of IEC 60625-2 (1993).
At times in this standard, specific reference is made to IEEE Std 488.1:1987, which constituted an
earlier version of IEEE Std 488.1:2003, the IEEE edition upon which IEC/IEEE 60488-1:2004 is
based. Where specific dated references were made to the 1987 edition, these references have been
maintained.
The text of this standard is based on the following documents:
IEEE Std FDIS Report on voting
488.2 (1992) 65C/320/FDIS 65C/326/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives.
The committee has decided that the contents of this publication will remain unchanged until 2009.
IEC/IEEE 60488 consists of the following publications:
• Higher performance protocol for the standard digital interface for programmable
instrumentation – Part 1: General (60488-1).
• Standard digital interface for programmable instrumentation – Part 2: Codes, formats,
protocols and common commands (60488-2).

Published by IEC under licence from IEEE. © 1992 IEEE. All rights reserved.

IEEE 488.2-1992(E)
IEC/IEEE Dual Logo International Standards
This Dual Logo International Standard is the result of an agreement between the IEC and the Institute of
Electrical and Electronics Engineers, Inc. (IEEE). The original IEEE Standard was submitted to the IEC for
consideration under the agreement, and the resulting IEC/IEEE Dual Logo International Standard has been
published in accordance with the ISO/IEC Directives.
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Published by IEC under licence from IEEE. © 1992 IEEE. All rights reserved.

– 8 – IEC 60488-2:2004(E)
IEEE 488.2-1992(E)
IEEE Standard Codes, Formats,
Protocols, and Common Commands for
use With IEEE Std 448.1-1987,
IEEE Standard Digital Interface for
Programmable Instrumentation
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Published by IEC under licence from IEEE. © 1992 IEEE. All rights reserved.


IEEE 488.2-1992(E)
IEEE Foreword
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Published by IEC under licence from IEEE. © 1992 IEEE. All rights reserved.
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– 10 – IEC 60488-2:2004(E)

IEEE 488.2-1992(E)
STANDARD DIGITAL INTERFACE
FOR PROGRAMMABLE INSTRUMENTATION -
Part 2: Codes, formats, protocols and common commands
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IEEE 488.2-1992(E)
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