IEC TS 61158-6:1999

TECHNICAL
IEC
SPECIFICATION
61158-6
First edition
1999-03
Digital data communications for
measurement and control —
Fieldbus for use in industrial control systems
Part 6:
Application Layer protocol specification

Reference number
IEC 61158-6:1999(E)
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
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available. For example, 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 amendments 1 and 2.

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thus ensuring that the content reflects current technology.
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Information on the subjects under consideration and work in progress undertaken by
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Published yearly with regular updates
(On-line catalogue)*
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Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
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general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
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* See web site address on title page.

TECHNICAL IEC
SPECIFICATION 61158-6
First edition
1999-03
Digital data communications for
measurement and control —
Fieldbus for use in industrial control systems
Part 6:
Application Layer protocol specification
© IEC 1999 – Copyright - all rights reserved
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.
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– 2 – 61158-6  IEC:1999
Contents
Page
FOREWORD.10

INTRODUCTION.12

1 Scope.13

2 Normative references.14

3 Definitions.15
3.1 Definitions from other ISO/IEC Standards .15
3.1.1 Definitions from ISO/IEC 7498-1 .15
3.1.2 Definitions from ISO/IEC 8822.15
3.1.3 Definitions from ISO/IEC 9545.15
3.1.4 Definitions from ISO/IEC 8824.15
3.1.5 Definitions from ISO/IEC 8825.15
3.2 Definitions from IEC 61158-5.16
3.3 Other definitions.16
3.3.1 called .16
3.3.2 calling.16
3.3.3 interoperability .16
3.3.4 management information.16
3.3.5 receiving .16
3.3.6 resource.16
3.3.7 sending .16
3.4 Abbreviations and symbols.16
3.5 Conventions.17
3.5.1 General Conventions.17
3.5.2 Conventions for Class Definitions.17
3.5.3 Abstract Syntax Conventions .17
3.6 Conventions used in State Machines.17
4 FAL Syntax Description.19
4.1 FAL-AR PDU Abstract Syntax 1 .19
4.1.1 Confirmed Send Service.19
4.1.2 Unconfirmed Send Service.19
4.1.3 Unconfirmed Acknowledged Send Service .19
4.1.4 Idle Send Service.20
4.1.5 AR-XON-OFF Send Service.20

4.1.6 Establish Service .20
4.2 FAL-AR PDU Abstract Syntax 2 .20
4.2.1 Confirmed Send Service.21
4.2.2 Unconfirmed Send Service.21
4.2.3 Unconfirmed Acknowledged Send Service .21
4.2.4 Idle Send Service.21
4.2.5 AR-XON-OFF Send Service.21
4.2.6 Establish Service .22
4.2.7 MaxOSCC .22
4.2.8 MaxOSCS.22
4.2.9 MaxUCSC.22
4.2.10 MaxUCSS.22
4.2.11 XON_OFF.22
4.2.12 CIU.22

61158-6  IEC:1999 – 3 –
Clause Page
4.3 Abstract Syntax of PDUBody.23

4.3.1 Abort Service .23

4.3.2 InvokeID .23

4.3.3 ConfirmedServiceRequest.23

4.3.4 ConfirmedServiceResponse.24

4.3.5 ConfirmedServiceError .25

4.3.6 Error Type.25

4.3.7 Error Class.26

4.3.8 Unconfirmed PDUs.27

4.3.9 Management ASE.27

4.3.9.1 Begin Set Attributes Service. 27

4.3.9.2 Create Service. 27
4.3.9.3 Delete Service . 27
4.3.9.4 End Set Attributes Service. 28
4.3.9.5 Get Attributes List Service . 28
4.3.9.6 Set Attributes Service . 28
4.3.10 Application Process ASE.29
4.3.10.1 Get Status Service. 29
4.3.10.2 Identify Service . 29
4.3.10.3 Initiate Service . 29
4.3.10.4 Status Notification Service. 30
4.3.10.5 Subscribe Service. 30
4.3.10.6 Reject Service. 30
4.3.10.7 Conclude Service. 30
4.3.11 Load Region ASE .30
4.3.11.1 Discard Service. 30
4.3.11.2 Initiate Load Service . 31
4.3.11.3 Pull Segment Service . 31
4.3.11.4 Push Segment Service . 32
4.3.11.5 Terminate Load Service. 32
4.3.12 Function Invocation ASE .32
4.3.12.1 ActionInvoke Service . 32
4.3.12.2 ActionReturn Service. 32
4.3.12.3 Kill Service. 32
4.3.12.4 Reset Service . 33
4.3.12.5 Resume Service . 33
4.3.12.6 Start Service . 33
4.3.12.7 Stop Service . 33
4.3.13 Variable Access ASE.33
4.3.13.1 Exchange Service. 33
4.3.13.2 Exchange List Service . 33
4.3.13.3 Information Report Service. 34
4.3.13.4 Information Report with Type Service. 34
4.3.13.5 Information List Report Service . 34
4.3.13.6 Read Service . 34

4.3.13.7 Read List Service. 35
4.3.13.8 Write List Service. 36
4.3.14 Event Management ASE .36
4.3.14.1 Confirmed Acknowledge Event service . 36
4.3.14.2 EnableEvent Service . 36
4.3.14.3 EnableEventList Service. 37
4.3.14.4 Event Notification Service. 37
4.3.14.5 Event Notification with Type Service .37
4.3.14.6 Get Event Summary Service . 37
4.3.14.7 Get Event Summary List Service.38
4.3.14.8 Notification Recovery Service. 38
4.3.14.9 Confirmed Acknowledge Event List Service. 38
4.3.14.10 Query Event Summary List Service. 39

– 4 – 61158-6  IEC:1999
Clause Page
4.3.15 Type Definitions.39

4.3.15.1 AP ASE Types. 39

4.3.15.2 AR ASE Types. 39

4.3.15.3 Data Link Layer Types. 40

4.3.15.4 Data Type ASE Types . 40

4.3.15.5 Event ASE Types. 40
4.3.15.6 Function Invocation ASE Types. 42
4.3.15.7 General Types . 43

4.3.15.8 Load Region ASE Types . 47

4.3.15.9 Management ASE Types. 48

4.3.15.10 Variable ASE Types. 58

4.4 Data Types.58

4.4.1 Notation for the Boolean Type.58
4.4.2 Notation for the Integer Type.59
4.4.3 Notation for the Unsigned Type.59
4.4.4 Notation for the Floating Point Type .59
4.4.5 Notation for the BitString Type.59
4.4.6 Notation for the OctetString Type .59
4.4.7 Notation for VisibleString Type .59
4.4.8 Notation for the UNICODEString Type .59
4.4.9 Notation for the FieldbusTime Type .59
4.4.10 Notation for the Universal Time Type .59
4.4.11 Notation for Binary Time Type.59
4.4.12 Notation for BCD Type .59
4.4.13 Notation for Compact Boolean Array Type.60
4.4.14 Notation for Compact BCD Array Type .60
4.4.15 Notation for Date Type .60
4.4.16 Notation for TimeOfDay Type.60
4.4.17 Notation for TimeDifference Type.60
4.4.18 Notation for TimeValue Type.60
5 FAL Protocol State Machine.61
5.1 AP Context State Machine.62
5.1.1 Primitive Definitions .62
5.1.1.1 Primitives Exchanged between FAL-User and AP-Context. 62
5.1.2 State Machine Description.62
5.1.3 AP-AP Context Initiation State Transitions .63
5.1.4 Functions .75
5.2 FAL Service Protocol Machine (FSPM) .78
5.2.1 Primitive Definitions .78
5.2.1.1 Primitives Exchanged between AP_Context and FSPM. 78
5.2.1.2 Parameters of AP_Context /FSPM Primitives. 79
5.2.2 FSPM State Tables.80

5.2.2.1 Functions . 84
5.3 DLL Mapping Protocol Machine (DMPM) .85
5.3.1 Primitive Definitions .85
5.3.1.1 Primitives Exchanged between DMPM and ARPM . 85
5.3.1.2 Parameters of ARPM/DMPM Primitives . 86
5.3.1.3 Primitives Exchanged between Data Link Layer and DMPM. 88
5.3.1.4 Parameters of DMPM/Data Link Layer Primitives. 89
5.3.2 DMPM State Machine.90
5.3.2.1 DMPM States. 90
5.3.2.2 DMPM State Table . 90
5.3.2.3 Functions used by DMPM. 98

61158-6  IEC:1999 – 5 –
Page
Annex A (normative) FAL Header .100

A.1 Introduction .100

Annex B (normative) Reason Codes .102

B.1 Introduction .102

Annex C (normative) Data Link Layer Service Selection.103

C.1 Introduction .103

C.1.1 DL-Connect .103

C.1.2 DL-Connection-Established.103

C.1.3 DL-Disconnect .103
C.1.4 DL-Unitdata.103
C.1.5 DL-Data .103
C.1.6 DL-Put.103
C.1.7 DL-Get .103
C.1.8 DL-Buffer-Received .103
C.1.9 DL-Buffer-Sent.103
C.1.10 DL-Compel-Data.103
Annex D (normative) Compact Encoding Rule (CER).104
D.1 Compact Encoding Rule (CER) .104
D.1.1 Introduction.104
D.1.2 APDU Header Encoding.104
D.1.2.1 APDU Header Encoding . 104
D.1.2.2 Encoding of Type Field. 104
D.1.2.3 Encoding of InvokeID Field. 105
D.1.2.4 APDU Body Encoding. 105
D.1.3 Data Type Encoding Rules (Base Encoding) .107
D.1.3.1 Encoding of a NULL Value . 107
D.1.3.2 Encoding of a Boolean Value . 107
D.1.3.3 Encoding of a Variable-Length Integer Value. 108
D.1.3.4 Encoding of a Fixed-Length Integer Value . 108
D.1.3.5 Encoding of a Variable-Length Unsigned Value. 108
D.1.3.6 Encoding of a Fixed-Length Unsigned Value . 109
D.1.3.7 Encoding of a Floating Point Value. 109
D.1.3.8 Encoding of a Variable-Length BitString value . 109
D.1.3.9 Encoding of a Fixed-Length BitString Value. 110
D.1.3.10 Encoding of a Variable-Length OctetString Value . 110
D.1.3.11 Encoding of a Fixed-Length Octet String Value. 110
D.1.3.12 Encoding of a Variable-Length VisibleString Value . 110
D.1.3.13 Encoding of a Fixed-Length VisibleString Value. 111
D.1.3.14 Encoding of an ISO10646String Value. 111

D.1.3.15 Encoding of a UniversalTime Value. 111
D.1.3.16 Encoding of Binary Time Value . 111
D.1.3.17 Encoding of a CompactBCDArray Value . 112
D.1.3.18 Encoding of an Array Value. 112
D.1.3.19 Encoding of a Structure Value. 112
D.1.3.20 Encoding of the ANY Type . 112
D.1.3.21 Encoding of a BCD Value. 113
D.1.3.22 Encoding of a FieldbusTime Value. 113
D.1.3.23 Encoding of a Compact Boolean Array Value . 113
D.1.3.24 Key words Encoding Rules. 113
Annex E (normative) Traditional Encoding Rule (TER) .116
E.1 Traditional Encoding Rule (TER) .116
E.1.1 Introduction.116
E.1.2 TER Descriptions.116
E.1.2.1 Overview of Encoding. 116

– 6 – 61158-6  IEC:1999
Page
E.1.2.2 APDU Header Encoding . 116

E.1.2.3 APDU Body Encoding. 116

E.1.2.4 Encoding of Simple Variables. 117

E.1.2.5 Encoding of Structured Types . 121

E.2 Object Definition Parameter.122

E.2.1 ListHeader .122

E.2.2 DataTypeList .122
E.2.3 StaticList .123
E.2.4 VariableListDefinition.124
E.2.5 FunctionInvocationDefinition.124

Annex F (normative) Buffer-Oriented Encoding Rules (BER)

and Messaging Encoding Rule (MER) .125
F.1 Encoding Rule for Buffer Services (BER).125
F.1.1 Introduction.125
F.1.2 Application Layer Encoding Rules .125
......................................................................................................... 125
F.1.2.1 Overview of Encoding
..................................................................................................... 125
F.1.2.2 APDU Header Encoding
......................................................................................................... 125
F.1.2.3 APDU Body Encoding
.....................................................................125
F.2 Encoding Rule for Messaging Services (MER)
.........................................................................................................126
F.2.1 Identification Octet
...................................................................................................126
F.2.2 Contents length octets
..............................................................................................................126
F.2.3 ContentsOctets
............................................................................................................126
F.3 Type Encoding Rules
..........................................................................................................................126
F.3.1 Boolean
............................................................................................................................126
F.3.2 Integer
.........................................................................................................................127
F.3.3 Bit string
....................................................................................................................127
F.3.4 Octet string
..................................................................................................................127
F.3.5 Visible string
........................................................................................................128
F.3.6 SEQUENCE Types
..................................................................................................128
F.3.7 SEQUENCE OF Types
..............................................................................................................128
F.3.8 CHOICE Types
.................................................................................................................................128
F.3.9 Null
................................................................................................................128
F.3.10 Tagged Types
.............................................................................................................128
F.3.11 IMPLICIT Types
.................................................................................129
F.3.12 OPTIONAL and DEFAULT Types
.....................................................................................................................129
F.3.13 ANY Types
............................................................................................129
F.3.14 Encoding of APDU Header
Annex G (normative) Queued Usertriggered Unidirectional (QUU) ARPM .130
..............................................................................................................130
G.1 Primitive Definitions
........................................................130
G.1.1 Primitives Exchanged between ARPM and FSPM

................................................................................130
G.2 Parameters of FSPM/ARPM Primitives
...............................................................................130
G.2.1 DLL Mapping of QUU AREP Class
G.2.1.1 Attributes. 131
G.2.1.2 DLL Services . 132
G.3 QUU ARPM State Machine.133
G.3.1 QUU ARPM States .133
G.3.2 QUU ARPM state table.133
G.3.3 Functions used by QUU ARPM .135
Annex H (normative) Queued Usertriggered Bidirectional-Connection
Oriented (QUB-CO) ARPM .136
H.1 Primitive Definitions .136
H.1.1 Primitives Exchanged between ARPM and FSPM .136
H.1.2 Parameters of FSPM/ARPM Primitives.136

61158-6  IEC:1999 – 7 –
Page
.......................................................................................137
H.2 DLL Mapping of QUB AREP Class

........................................................................................................................137
H.2.1 Attributes
H.2.1.1 LocalDlcepAddress. 137

H.2.1.2 RemoteAddressConfigurationType. 138

H.2.1.3 Role . 138

H.2.1.4 DlsapRole . 138

H.2.1.5 QosParameterSet. 138
H.2.2 DLL Services .140
H.3 QUB AREP State Machine .140
H.3.1 QUB ARPM States .140

H.3.2 QUB ARPM state table.141

H.3.3 Functions used by QUB ARPM .149

Annex I (normative) Queued Usertriggered Bidirectional-Connectionless
(QUB-Cl) ARPM.151
I.1 Primitive Definitions .151
I.1.1 Primitives Exchanged between ARPM and FSPM.151
I.1.2 Parameters of FSPM/ARPM Primitives.151
I.2 DLL Mapping of QUB-CL AREP Class .152
I.2.1 Attributes .152
................................................................................................................. 152
I.2.1.1 LocalDlsapAddress
............................................................................................................. 152
I.2.1.2 RemoteDlsapAddress
....................................................................................................................... 152
I.2.1.3 LocalDlsapRole
.............................................................................................................. 152
I.2.1.4 DefaultQosAsSender
.......................................................................................................................... 153
I.2.1.5 ExplicitQueue
.....................................................................................................................153
I.2.2 DLL Services
.............................................................................................154
I.3 QUB-CL ARPM State Machine
......................................................................................................154
I.3.1 QUB-CL ARPM States
..............................................................................................154
I.3.2 QUB-CL ARPM State Table
....................................................................................157
I.3.3 Functions used by QUB-Cl ARPM
Annex J (normative) Queued Usertriggered Bidirectional-Segmentation
(QUB-Seg) ARPM.159
J.1 Primitive Definitions .159
J.1.1 Primitives Exchanged between ARPM and FSPM .159
J.2 Parameters of FSPM/ARPM Primitives .159
J.2.1 DLL Mapping of QUB-Seg AREP Class.160
J.2.1.1 Attributes. 161
J.2.1.2 DLL Services . 164
J.3 QUB-Seg ARPM State Machine .164
J.3.1 QUB-Seg ARPM States.164
J.3.2 QUB-Seg ARPM State Table .165

J.3.3 Functions used by QUB-Seg ARPM.177
Annex K (normative) Queued Usertriggered Bidirectional-Flow Control
(QUB-FC) ARPM.180
K.1 QUB-FCPrimitive Definitions.180
K.1.1 Primitives Exchanged between ARPM and FSPM .180
K.2 Parameters of FSPM/ARPM Primitives .181
K.2.1 DLL Mapping of QUB-FC AREP Class.181
K.2.1.1 Attributes. 182
K.2.2 DLL Services .185
K.3 QUB-FC ARPM State Machine.185
K.3.1 QUB-FC ARPM States .185
K.3.2 QUB-FC ARPM State Table .
...