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BS EN 61158-5-12:2014

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Industrial communication networks. Fieldbus specifications Application layer service definition. Type 12 elements
Available format(s)

Hardcopy , PDF

Superseded date

18-07-2019

Language(s)

English

Published date

31-10-2014

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 standard 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 standard defines in an abstract way the externally visible service provided by the different Types of the fieldbus Application Layer in terms of an abstract model for defining application resources (objects) capable of being manipulated by users via the use of the FAL service, the primitive actions and events of the service; the parameters associated with each primitive action and event, and the form which they take; and the interrelationship between these actions and events, and their valid sequences. The purpose of this standard is to define the services provided to the FAL user at the boundary between the user and the Application Layer of the Fieldbus Reference Model, and Systems Management at the boundary between the Application Layer and Systems Management of the Fieldbus Reference Model. This standard specifies the structure and services 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 standard to provide access to the FAL to control certain aspects of its operation. 1.2 Specifications The principal objective of this standard is to specify the characteristics of conceptual application layer services suitable for time-critical communications, and thus supplement the OSI Basic Reference Model in guiding the development of application layer protocols for time-critical communications. A secondary objective is to provide migration paths from previously-existing industrial communications protocols. It is this latter objective which gives rise to the diversity of services standardized as the various Types of IEC 61158, and the corresponding protocols standardized in subparts of IEC 61158-6. This specification may be used as the basis for formal Application Programming-Interfaces. Nevertheless, it is not a formal programming interface, and any such interface will need to address implementation issues not covered by this specification, including the sizes and octet ordering of various multi-octet service parameters, and the correlation of paired request and confirm, or indication and response, primitives. 1.3 Conformance This standard does not specify individual implementations or products, nor does it constrain the implementations of application layer entities within industrial automation systems. There is no conformance of equipment to this application layer service definition standard. Instead, conformance is achieved through implementation of conforming application layer protocols that fulfill any given Type of application layer services as defined in this standard.

Committee
GEL/65/3
DevelopmentNote
Supersedes BS EN 61158-5. (02/2009)
DocumentType
Standard
ISBN
9780580794582
Pages
134
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

Standards Relationship
EN 60745-2-12:2009 Identical
EN 61158-5-12:2014 Identical
IEC 61158-5-12:2014 Identical

EN 61158-1:2014 Industrial communication networks - Fieldbus specifications - Part 1: Overview and guidance for the IEC 61158 and IEC 61784 series
IEC 61158-2:2014 Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition
ISO/IEC 7498-3:1997 Information technology Open Systems Interconnection Basic Reference Model: Naming and addressing
IEC 61784-1:2014 Industrial communication networks - Profiles - Part 1: Fieldbus profiles
ISO/IEC 7498-1:1994 Information technology Open Systems Interconnection Basic Reference Model: The Basic Model
ISO/IEC 10646:2014 Information technology Universal Coded Character Set (UCS)
IEC 61131-3:2013 Programmable controllers - Part 3: Programming languages
EN 61158-6-12:2014 Industrial communication networks - Fieldbus specifications - Part 6-12: Application layer protocol specification - Type 12 elements
EN 61158-3-12:2014 Industrial communication networks - Fieldbus specifications - Part 3-12: Data-link layer service definition - Type 12 elements
IEC 61158-3-12:2014 Industrial communication networks - Fieldbus specifications - Part 3-12: Data-link layer service definition - Type 12 elements
IEC 61158-4-12:2014 Industrial communication networks - Fieldbus specifications - Part 4-12: Data-link layer protocol specification - Type 12 elements
ISO/IEC 8802-3:2000 Information technology Telecommunications and information exchange between systems Local and metropolitan area networks Specific requirements Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications
IEEE 802.1Q-2014 IEEE Standard for Local and metropolitan area networks--Bridges and Bridged Networks
IEEE 802.1D-2004 IEEE Standard for Local and metropolitan area networks: Media Access Control (MAC) Bridges
ISO/IEC 10731:1994 Information technology Open Systems Interconnection Basic Reference Model Conventions for the definition of OSI services
ISO/IEC 9545:1994 Information technology Open Systems Interconnection Application Layer structure
EN 61131-3:2013 Programmable controllers - Part 3: Programming languages
ISO/IEC/IEEE 60559:2011 Information technology Microprocessor Systems Floating-Point arithmetic
EN 50325-4:2002 Industrial communications subsystem based on ISO 11898 (CAN) for controller-device interfaces - Part 4: CANopen
IEC 61158-6-12:2014 Industrial communication networks - Fieldbus specifications - Part 6-12: Application layer protocol specification - Type 12 elements
ISO/IEC 646:1991 Information technology ISO 7-bit coded character set for information interchange
EN 61158-2:2014 Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition
EN 61784-2:2014 Industrial communication networks - Profiles - Part 2: Additional fieldbus profiles for real-time networks based on ISO/IEC 8802-3
EN 61784-1:2014 Industrial communication networks - Profiles - Part 1: Fieldbus profiles
EN 61158-4-12:2014 Industrial communication networks - Fieldbus specifications - Part 4-12: Data-link layer protocol specification - Type 12 elements
IEC 61784-2:2014 Industrial communication networks - Profiles - Part 2: Additional fieldbus profiles for real-time networks based on ISO/IEC 8802-3

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