IEC PAS 61158-6-22:2009

IEC/PAS 61158-6-22 ®
Edition 1.0 2009-08
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-22: Application layer protocol specification – Type SNpTYPE elements

IEC/PAS 61158-6-22:2009(E)
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IEC/PAS 61158-6-22 ®
Edition 1.0 2009-08
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-22: Application layer protocol specification – Type SNpTYPE elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XD
ICS 25.040.40; 35.100.70 ISBN 978-2-88910-797-1
– 2 – PAS 61158-6-22 © IEC:2009(E)

CONTENTS
FOREWORD.6

INTRODUCTION.8

1 Scope.9

1.1 General .9

1.2 Specifications.10

1.3 Conformance.10

2 Normative references .10

3 Terms, definitions, abbreviations, symbols and conventions .11
3.1 Referenced terms and definitions .11
3.1.1 ISO/IEC 7498-1 terms .11
3.1.2 ISO/IEC 8822 terms.11
3.1.3 ISO/IEC 9545 terms.11
3.1.4 ISO/IEC 8824 terms.11
3.2 Fieldbus application-layer specific definitions .11
3.3 Abbreviations and symbols.14
3.4 Conventions .17
3.4.1 General concept .17
3.4.2 Abstract syntax conventions .17
4 Application layer protocol specification .18
4.1 Operating principle .18
4.2 Device reference models .19
4.2.1 RTFL device reference model.19
4.2.2 RTFN device reference model .19
4.3 Application Layer structure .20
5 FAL syntax description .20
5.1 Introduction and coding principles .20
5.2 Data type encoding .20
5.2.1 Overview .20
5.2.2 Transfer syntax for bit sequences .21
5.2.3 Encoding of a Boolean value .21
5.2.4 TimeOfDay .21
5.2.5 TimeDifference .22

5.2.6 Encoding of floating point values .22
5.2.7 Encoding of Integer values .22
5.2.8 Encoding of Unsigned Integer values.23
5.2.9 Encoding of an OctetString value.24
5.2.10 Encoding of a VisibleString value .24
5.2.11 Encoding of an UnicodeString value .24
5.3 CeS encoding.24
5.3.1 Object dictionary .24
5.3.2 SDO .67
5.3.3 Process data write.72
5.3.4 Emergency .72
5.3.5 Heartbeat .74
5.4 Standard Ethernet frame communication .74
5.4.1 Overview .74

PAS 61158-6-22 © IEC:2009(E) – 3 –

5.4.2 Send frame request .74

5.5 Management encoding .75

5.5.1 DLL management services .75

5.5.2 Application layer management.75

6 FAL protocol state machines .75

6.1 Overview .75

6.2 Fieldbus service protocol machine (FSPM).77

6.3 Application relationship protocol machine (ARPM).77

6.4 DLL mapping protocol machine .77

7 AP-context state machine.77
8 FAL service protocol machine (FSPM).77
9 Application layer state machine (ALSM) .78
9.1 Description.78
9.2 States .80
9.2.1 Initialization (INIT) .80
9.2.2 ResetApplication (ResAP) .80
9.2.3 ResetCommunication (ResCO) .80
9.2.4 PreOperational (PreOP) .80
9.2.5 Operational (OP) .81
9.2.6 Stopped (ST) .81
9.3 Primitive definitions .81
9.3.1 FAL primitives .81
9.3.2 Primitives exchanged between DLL and ALSM .81
9.3.3 Primitives exchanged between FSPM and ALSM .81
9.4 State table.83
9.5 AL-service forwarding depending on AL-state.84
10 DLL mapping protocol machine (DMPM).84
10.1 Overview .84
10.2 Primitives exchanged between ALSM and DMPM .84
10.3 Primitives exchanged between DLL and DMPM .89
10.4 ALSM to DLL mapping.91

Figure 1 – RTFL device reference model .19
Figure 2 – RTFN device reference model.20

Figure 3 – Encoding of TimeOfDay value .21
Figure 4 – Encoding of TimeDifference value.22
Figure 5 – Object dictionary addressing schema .25
Figure 6 – Relationships among protocol machines and adjacent layers .76
Figure 7 – ALSM protocol machine .77
Figure 8 – ALSM diagram .79

Table 1 – PDU element definition.17
Table 2 – Object definition .18
Table 3 – Transfer syntax for bit sequences.21
Table 4 – Transfer syntax for Integer data type.23
Table 5 – Transfer syntax for Unsigned data type .23

– 4 – PAS 61158-6-22 © IEC:2009(E)

Table 6 – Object dictionary structure.24

Table 7 – Object dictionary object type definitions .25

Table 8 – Basic data type definitions.26

Table 9 – Complex data type definition .27

Table 10 – Communication section .28

Table 11 – Device type .30

Table 12 – Error register encoding.30

Table 13 – Error register.30

Table 14 – Object d
...