1.1 General

The Fieldbus Application Layer (FAL) provides user programs with a means to access the fieldbus communication environment. In this respect, the FAL can be viewed as a “window between corresponding application programs.”

This part of IEC 61158 provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment and material specific to Type 12 fieldbus. The term “time-critical” is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level of certainty. Failure to complete specified actions within the time window risks failure of the applications requesting the actions, with attendant risk to equipment, plant and possibly human life.

This International Standard defines in an abstract way the externally visible behavior provided by the different Types of the fieldbus Application Layer in terms of

the abstract syntax defining the application layer protocol data units conveyed between communicating application entities,
the transfer syntax defining the application layer protocol data units conveyed between communicating application entities,
the application context state machine defining the application service behavior visible between communicating application entities; and
the application relationship state machines defining the communication behavior visible between communicating application entities; and.

The purpose of this document is to define the protocol provided to

define the wire-representation of the service primitives defined in IEC 61158-5-12, and
define the externally visible behavior associated with their transfer.

This document specifies the protocol of the IEC fieldbus Application Layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498) and the OSI Application Layer Structure (ISO/IEC 9545).

FAL services and protocols are provided by FAL application-entities (AE) contained within the application processes. The FAL AE is composed of a set of object-oriented Application Service Elements (ASEs) and a Layer Management Entity (LME) that manages the AE. The ASEs provide communication services that operate on a set of related application process object (APO) classes. One of the FAL ASEs is a management ASE that provides a common set of services for the management of the instances of FAL classes.

Although these services specify, from the perspective of applications, how request and responses are issued and delivered, they do not include a specification of what the requesting and responding applications are to do with them. That is, the behavioral aspects of the applications are not specified; only a definition of what requests and responses they can send/receive is specified. This permits greater flexibility to the FAL users in standardizing such object behavior. In addition to these services, some supporting services are also defined in this document to provide access to the FAL to control certain aspects of its operation.

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PDF Pages	PDF Title
2	National foreword
5	Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7	CONTENTS
13	FOREWORD
15	INTRODUCTION
16	1 Scope 1.1 General
17	1.2 Specifications 1.3 Conformance 2 Normative references
18	3 Terms, definitions, symbols, abbreviations and conventions 3.1 Reference model terms and definitions
19	3.2 Service convention terms and definitions 3.3 Application layer definitions
24	3.4 Common symbols and abbreviations
25	3.5 Additional symbols and abbreviations 3.6 Conventions 3.6.1 General concept
26	3.6.2 Convention for the encoding of reserved bits and octets 3.6.3 Conventions for the common codings of specific field octets Figures Figure 1 – Common structure of specific fields
27	3.6.4 Abstract syntax conventions Figure 2 – Type description example Tables Table 1 – PDU element description example
28	3.6.5 State machine conventions Table 2 – Example attribute description
29	Table 3 – State machine description elements Table 4 – Description of state machine elements Table 5 – Conventions used in state machines
30	4 Application layer protocol specification 4.1 Operating principle 4.2 Node reference model 4.2.1 Mapping onto OSI basic reference model
31	4.2.2 Data Link Layer features 4.2.3 Application Layer structure Figure 3 – Slave Node Reference Model
32	5 FAL syntax description 5.1 Coding principles 5.2 Data types and encoding rules 5.2.1 General description of data types and encoding rules 5.2.2 Encoding of a Boolean value 5.2.3 Encoding of a Time Of Day with and without date indication value Figure 4 – Encoding of Time of Day value
33	5.2.4 Encoding of a Time Difference with and without date indication value 5.2.5 Transfer syntax for bit sequences 5.2.6 Encoding of a Unsigned Integer value Figure 5 – Encoding of Time Difference value Table 6 – Transfer Syntax for bit sequences
34	5.2.7 Encoding of a Signed Integer value Table 7 – Transfer syntax for data type Unsignedn
35	5.2.8 Encoding of a Floating Point value 5.2.9 Encoding of a Visible String value 5.2.10 Encoding of a Unicode String value 5.2.11 Encoding of an Octet String value 5.2.12 Encoding of GUID 5.3 AR coding 5.3.1 AL Control Request (Indication) Figure 6 – AL Control Request structure Table 8 – Transfer syntax for data type Integern
36	5.3.2 AL Control Response (Confirmation) Figure 7 – AL Control Response structure Table 9 – AL Control Description
37	Table 10 – AL Control Response Table 11 – AL Status Codes
38	5.3.3 AL State Changed
39	5.3.4 AL AR Attributes Figure 8 – AL State Changed structure Figure 9 – PDI Control type description Table 12 – AL State Changed
40	Figure 10 – Sync Configuration type description Table 13 – PDI Control Table 14 – PDI Configuration Table 15 – Sync Configuration
41	5.4 SII coding Table 16 – Slave Information Interface Area
42	Table 17 – Slave Information Interface Categories Table 18 – Mailbox Protocols Supported Types Table 19 – Categories Types
43	Table 20 – Structure Category String Table 21 – Structure Category General
44	Table 22 – Identification Methods Table 23 – Structure Category FMMU
45	Table 24 – Structure Category SyncM for each Element Table 25 – Structure Category TXPDO and RXPDO for each PDO
46	5.5 Isochronous PDI coding Figure 11 – Distributed Clock sync and latch type description Table 26 – Structure PDO Entry
47	Table 27 – Distributed Clock sync parameter
48	5.6 CoE coding 5.6.1 PDU structure Figure 12 – CoE general structure Table 28 – Distributed Clock latch data
49	5.6.2 SDO Figure 13 – SDO Download Expedited Request structure Table 29 – CoE elements
50	Figure 14 – SDO Download Expedited Response structure Table 30 – SDO Download Expedited Request
51	Figure 15 – SDO Download Normal Request structure Table 31 – SDO Download Expedited Response
52	Table 32 – SDO Download Normal Request
53	Figure 16 – Download SDO Segment Request structure Table 33 – Download SDO Segment Request
54	Figure 17 – Download SDO Segment Response structure Figure 18 – SDO Upload Expedited Request structure Table 34 – Download SDO Segment Response
55	Figure 19 – SDO Upload Expedited Response structure Table 35 – SDO Upload Expedited Request
56	Table 36 – SDO Upload Expedited Response
57	Figure 20 – SDO Upload Normal Response structure Table 37 – SDO Upload Normal Response
58	Figure 21 – Upload SDO Segment Request structure Figure 22 – Upload SDO Segment Response structure Table 38 – Upload SDO Segment Request
59	Figure 23 – Abort SDO Transfer Request structure Table 39 – Upload SDO Segment Response
60	Table 40 – Abort SDO Transfer Request
61	5.6.3 SDO Information Table 41 – SDO Abort Codes
62	Figure 24 – SDO Information Service structure Table 42 – SDO Information Service
63	Figure 25 – Get OD List Request structure Table 43 – Get OD List Request
64	Figure 26 – Get OD List Response structure Table 44 – Get OD List Response
65	Figure 27 – Get Object Description Request structure Table 45 – Get Object Description Request
66	Figure 28 – Get Object Description Response structure Table 46 – Get Object Description Response
67	Figure 29 – Get Entry Description Request structure Table 47 – Get Entry Description Request
68	Figure 30 – Get Entry Description Response structure Table 48 – Get Entry Description Response
69	Figure 31 – SDO Info Error Request structure
70	5.6.4 Emergency Table 49 – SDO Info Error Request
71	Table 50 – Emergency Request
72	Table 51 – Emergency Error Codes Table 52 – Error Code
73	Table 53 – Diagnostic Data Table 54 – Sync Manager Length Error Table 55 – Sync Manager Address Error Table 56 – Sync Manager Settings Error
74	5.6.5 Process Data Table 57 – RxPDO Transmission via mailbox Table 58 – TxPDO Transmission via mailbox
75	5.6.6 Command Table 59 – RxPDO Remote Transmission Request Table 60 – TxPDO Remote Transmission Request
76	5.6.7 Object Dictionary Table 61 – Command object structure Table 62 – Object Dictionary Structure Table 63 – Object Code Definitions
77	Table 64 – Basic Data Type Area
78	Table 65 – Extended Data Type Area
79	Table 66 – Enumeration Definition Table 67 – CoE Communication Area
80	Table 68 – Device Type
81	Table 69 – Error Register Table 70 – Manufacturer Device Name
82	Table 71 – Manufacturer Hardware Version Table 72 – Manufacturer Software Version Table 73 – Identity Object
83	Table 74 – Receive PDO Mapping Table 75 – Transmit PDO Mapping
84	Table 76 – Sync Manager Communication Type
85	Table 77 – Sync Manager Channel 0-31
86	5.7 EoE coding 5.7.1 Initiate EoE Figure 32 – EoE general structure Table 78 – Sync Manager Synchronization
87	Figure 33 – EoE Timestamp structure Table 79 – Initiate EoE Request
88	5.7.2 EoE Fragment Data Figure 34 – EoE Fragment Data structure Table 80 – Initiate EoE Response
89	5.7.3 Data element for EoE Table 81 – EoE Fragment Data
90	5.7.4 Set IP Parameter Figure 35 – Set IP Parameter Request structure Table 82 – EoE Data
91	Table 83 – Set IP Parameter Request
92	Figure 36 – Set IP Parameter Response structure Table 84 – Set IP Parameter Response
93	5.7.5 Set Address Filter Figure 37 – Set MAC Filter Request structure Table 85 – EoE Result Parameter Table 86 – Set MAC Filter Request
94	Figure 38 – Set MAC Filter Response structure
95	5.8 FoE Coding 5.8.1 Read Request Figure 39 – Read Request structure Table 87 – Set MAC Filter Response
96	5.8.2 Write Request Figure 40 – Write Request structure Table 88 – Read Request
97	5.8.3 Data Request Figure 41 – Data Request structure Table 89 – Write Request
98	5.8.4 Ack Request Figure 42 – Ack Request structure Table 90 – Data Request
99	5.8.5 Error Request Figure 43 – Error Request structure Table 91 – Ack Request
100	5.8.6 Busy Request Table 92 – Error Request Table 93 – Error codes of FoE
101	6 FAL protocol state machines 6.1 Overall structure 6.1.1 Overview Figure 44 – Busy Request structure Table 94 – Busy Request
102	6.1.2 Fieldbus Service Protocol Machines (FSPM) 6.1.3 Application Relationship Protocol Machines (ARPM) Figure 45 – Relationship among Protocol Machines
103	6.1.4 DLL Mapping Protocol Machines (DMPM) 6.2 AP-Context state machine 6.3 FAL service protocol machine (FSPM) 6.4 Application Relationship Protocol Machines (ARPMs) 6.4.1 AL state machine Figure 46 – AR Protocol machines
105	Figure 47 – ESM Diagramm Table 95 – State transitions and local management services
106	Table 96 – Primitives issued by ESM to DL
107	Table 97 – Primitives issued by DL to ESM Table 98 – Primitives issued by Application to ESM Table 99 – Primitives issued by ESM to Application
108	Table 100 – ESM Variables
109	Table 101 – ESM macros Table 102 – ESM functions
110	Table 103 – ESM state table
122	6.4.2 Mailbox handler state machine Table 104 – Primitives issued by Mailbox handler to DL
123	6.4.3 CoE state machine Table 105 – Primitives issued by DL to Mailbox handler Table 106 – Primitives issued by Protocol handler to Mailbox handler Table 107 – Primitives issued by Mailbox handler to Protocol handler
124	Table 108 – Primitives issued by Application to CoESM
125	Table 109 – Primitives issued by CoESM to Application
126	Table 110 – CoESM state table
134	6.4.4 EoE state machine
135	Table 111 – Primitives issued by Application to EoESM
136	Table 112 – Primitives issued by EoESM to Application
137	Table 113 – EoESM state table
141	6.4.5 FoE state machine Table 114 – Primitives issued by Application to FoESM
142	Table 115 – Primitives issued by FoESM to Application
143	Table 116 – FoESM state table
146	6.5 DLL mapping protocol machine (DMPM)
147	Bibliography

Published By	Publication Date	Number of Pages
BSI	2019	148


PDF Format	Searchable	Printable	Preview Now

Status	Definitive
Pages	148
Publication Date	2019-09-04
ISBN	978 0 539 05640 2
Standard Number	BS EN IEC 61158-6-12:2019
Title	Industrial communication networks. Fieldbus specifications – Application layer protocol specification. Type 12 elements
Identical National Standard Of	EN IEC 61158-6-12:2019, IEC 61158-6-12:2019
Replaces	BS EN 61158-6-12:2014
Descriptors	Data transmission, Process control, Fieldbus, Application layer (OSI), Bus networks, Communication networks, Communication procedures, Open systems interconnection, Interfaces (data processing), Automatic control systems, Industrial, Computer networks
Publisher	BSI
Committee	GEL/65/3
ICS Codes	35.110 - Networking

BS EN IEC 61158-6-12:2019

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