IEC 61158-6-20:2010
(Main)Industrial communication networks - Fieldbus specifications - Part 6-20: Application layer protocol specification - Type 20 elements
Industrial communication networks - Fieldbus specifications - Part 6-20: Application layer protocol specification - Type 20 elements
IEC 61158-6-20:2010(E) specifies the protocol of the Type 20 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545). It defines the protocol provided to define the wire-representation of the service primitives defined in IEC 61158-5-20:2010, and the externally visible behavior associated with their transfer. This second edition cancels and replaces the first edition published in 2007 and constitutes a technical revision. The main changes with respect to the previous edition are: revised Identify FAL PDU, see 5.3.2 and revised Read device variables with status FAL PDU, see 5.3.9.
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IEC 61158-6-20 ®
Edition 2.0 2010-08
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-20: Application layer protocol specification – Type 20 elements
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IEC 61158-6-20 ®
Edition 2.0 2010-08
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-20: Application layer protocol specification – Type 20 elements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XA
ICS 25.04.40; 35.100.70; 35.110 ISBN 978-2-88912-134-2
– 2 – 61158-6-20 © IEC:2010(E)
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.8
1.1 General .8
1.2 Specifications.8
1.3 Conformance.9
2 Normative references .9
3 Terms, definitions, symbols, abbreviations and conventions .10
3.1 Terms and definitions from other ISO/IEC standards .10
3.2 IEC/TR 61158-1 terms.10
3.3 Type 20 fieldbus application-layer specific definitions.13
3.4 Abbreviations and symbols.15
3.5 Conventions .16
3.6 Conventions used in state machines .16
4 Abstract syntax.17
5 Transfer syntax .17
5.1 General .17
5.2 Common APDU structure .18
5.3 Service-specific APDU structures .20
5.4 Data coding rules .35
6 Structure of FAL protocol state machines .41
7 AP-context state machines .42
8 FAL service protocol machine (FSPM).42
8.1 General .42
8.2 FSPM state tables .43
8.3 Functions used by FSPM.48
8.4 Parameters of FSPM/ARPM primitives .48
9 Application relationship protocol machines (ARPMs) .49
9.1 AREP mapping to data link layer .49
9.2 Application relationship protocol machines (ARPMs) .50
9.3 AREP state machine primitive definitions .52
9.4 AREP state machine functions .52
10 DLL mapping protocol machine (DMPM).52
10.1 DMPM states.52
10.2 DMPM state machines.53
10.3 Primitives exchanged between data link layer and DMPM .53
10.4 Functions used by DMPM.54
Bibliography.55
Figure 1 – APDU format.18
Figure 2 – Normal response from slave to master .18
Figure 3 – Command error response from slave to master .19
Figure 4 – Communication error response from slave to master.20
Figure 5 – Coding without identification .36
Figure 6 – Coding of Integer type data .36
61158-6-20 © IEC:2010(E) – 3 –
Figure 7 – Coding of Integer16 type data .36
Figure 8 – Coding of Unsigned type data .36
Figure 9 – Coding of Unsigned16 type data .36
Figure 10 – Coding of single precision Floating Point type data .37
Figure 11 – Coding of double precision Floating Point type data .38
Figure 12 – Coding of Date type data.38
Figure 13 – Relationships among protocol machines and adjacent layers .42
Figure 14 – State transition diagram of FSPM.43
Figure 15 – State transition diagram of the client ARPM .50
Figure 16 – State transition diagram of the server ARPM .51
Figure 17 – State transition diagram of DMPM .53
Table 1 – Conventions used for state machines .16
Table 2 – Response code values .19
Table 3 – Device status values .19
Table 4 – Response code values .20
Table 5 – Communication error codes.20
Table 6 – Identify request APDU.21
Table 7 – Identify response value field.22
Table 8 – Identify command specific response codes.22
Table 9 – Read primary variable response value field .23
Table 10 – Read primary variable command specific response codes .23
Table 11 – Read loop current and percent of range value field.23
Table 12 – Read loop current and percent of range command specific response codes .24
Table 13 – Read dynamic variables and loop current value field .24
Table 14 – Read dynamic variables and loop current command specific response
codes.24
Table 15 – Write polling address value field.25
Table 16 – Loop current mode codes .25
Table 17 – Write polling address command specific response codes.25
Table 18 – Read loop configuration value field.26
Table 19 – Read loop configuration command specific response codes .26
Table 20 – Read dynamic variable families classifications value field.26
Table 21 – Read dynamic variable families classifications command specific response
codes.27
Table 22 – Read device variables with status request value field .27
Table 23 – Read device variables with status value field.27
Table 24 – Variable status values .29
Table 25 – Read device variables with status command specific response codes .29
Table 26 – Read message response value field .30
Table 27 – Read message command specific response codes .30
Table 28 – Read tag, descriptor, date response value field .30
Table 29 – Read tag, descriptor, date command specific response codes .30
Table 30 – Read primary variable transducer information response value field.31
– 4 – 61158-6-20 © IEC:2010(E)
Table 31 – Read primary variable transducer information command specific response
codes.31
Table 32 – Read device information response value field.32
Table 33 – Read device information command specific response codes.32
Table 34 – Read final assembly number response value field .32
Table 35 – Read final assembly number command specific response codes .33
Table 36 – Write message value field .33
Table 37 – Write message command specific response codes .33
Table 38 – Write tag, descriptor, date value field .33
Table 39 – Write tag, descriptor, date command specific response codes .34
Table 40 – Write final assembly number value field.34
Table 41 – Write final assembly number command specific response codes .34
Table 42 – Read long tag response value field.35
Table 43 – Read long tag command-specific response codes .35
Table 44 – Writ
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