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35.100.70 - Application layer

ICS 35.100.70 Details

Application layer

Anwenderschicht (Application layer)

Couche application

Uporabniški sloj

General Information

Parent
35.100 - Open systems interconnection (OSI)

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Standardization Organization
Technical Committee
Directive
Mandate
50
ISO
ISO/IEC 9594-11:2025(Main)
Information technology — Open systems interconnection directory — Part 11: Protocol specifications for secure operations

This document provides guidance on how to prepare new and old protocols for cryptographic algorithm migration and defines auxiliary cryptographic algorithms to be used for migration purposes. This document specifies a general wrapper protocol that provides authentication, integrity and confidentiality (encryption) protection for other protocols. This wrapper protocol includes a migration path for cryptographic algorithms allowing for smooth migration to stronger cryptographic algorithms as such requirements evolve. This will allow migration to quantum-safe cryptographic algorithms. Protected protocols can then be developed without taking security and cryptographic algorithms into consideration. This document also includes some protocols to be protected by the wrapper protocol primarily for support of public-key infrastructure (PKI). Other specifications, e.g., Recommendations or International Standards, may also develop protocols designed to be protected by the wrapper protocol.

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ISO/IEC 9594-8:2020/Amd 1:2025(Amendment)
Information technology — Open systems interconnection — Part 8: The Directory: Public-key and attribute certificate frameworks — Amendment 1: Miscellaneous enhancements
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ISO
ISO/IEC 9594-5:2020/Amd 1:2025(Amendment)
Information technology — Open systems interconnection — Part 5: The Directory: Protocol specifications — Amendment 1: Miscellaneous enhancements
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ISO/IEC 9594-9:2020/Amd 1:2025(Amendment)
Information technology — Open systems interconnection — Part 9: The Directory: Replication — Amendment 1: Miscellaneous enhancements
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ISO/IEC 9594-7:2020/Amd 1:2025(Amendment)
Information technology — Open systems interconnection — Part 7: The Directory: Selected object classes — Amendment 1: Miscellaneous enhancements
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ISO
ISO/IEC 9594-6:2020/Amd 1:2025(Amendment)
Information technology — Open systems interconnection — Part 6: The Directory: Selected attribute types — Amendment 1
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ISO/IEC 9594-3:2020/Amd 1:2025(Amendment)
Information technology — Open systems interconnection — Part 3: The Directory: Abstract service definition — Amendment 1: Miscellaneous enhancements
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ISO/IEC 9594-1:2020/Amd 1:2025(Amendment)
Information technology — Open systems interconnection — Part 1: The Directory: Overview of concepts, models and services — Amendment 1: Miscellaneous enhancements
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ISO
ISO/IEC 9594-12:2025(Main)
Information technology — Open systems interconnection — Part 12: The Directory: Key management and public-key infrastructure establishment and maintenance

This Recommendation | International Standard supplements Rec. ITU-T X.509 | ISO/IEC 9594-8 and Rec. ITU-T X.510 | ISO/IEC 9594-11 by providing an extended description of cryptographic algorithms and guidance in establishment and maintenance of a public-key infrastructure (PKI). It is outside the scope of this Recommendation | International Standard to define new cryptographic algorithms, but it is within scope to discuss already-defined cryptographic algorithms that provide optimal protection, including future protection against attacks using powerful quantum computers. This Recommendation | International Standard specifies how public-key infrastructure (PKI) may be adapted to support machine-to-machine (M2M) communication, e.g., smart grid and Internet of things (IoT), to allow interworking. This Recommendation | International Standard specifies the procedures for establishment and maintenance of a PKI supporting new areas, such as intelligent electricity network (smart grid) and industrial Internet of things.

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ISO/IEC 9594-2:2020/Amd 2:2025(Amendment)
Information technology — Open systems interconnection — Part 2: The Directory: Models — Amendment 2: Miscellaneous enhancements
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ISO/IEC 9594-4:2020/Amd 1:2025(Amendment)
Information technology — Open systems interconnection — Part 4: The Directory: Procedures for distributed operation — Amendment 1: Miscellaneous enhancements
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SIST
SIST EN 13757-3:2025(Main)
Communication systems for meters - Part 3: Application protocols
EN 13757-3:2025

This document specifies application services for communication systems for meters, sensors, and actuators, used to provide metering services.
This document specifies application protocols, especially the M-Bus application protocol.
This document is intended to be used with the lower layer specifications determined in the relevant parts of the EN 13757 series.

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CEN
EN 13757-3:2025(Main)
Communication systems for meters - Part 3: Application protocols
SIST EN 13757-3:2025

This document specifies application services for communication systems for meters, sensors, and actuators, used to provide metering services.
This document specifies application protocols, especially the M-Bus application protocol.
This document is intended to be used with the lower layer specifications determined in the relevant parts of the EN 13757 series.

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ISO/IEC 9594-8:2020/Cor 2:2024(Corrigendum)
Information technology — Open systems interconnection — Part 8: The Directory: Public-key and attribute certificate frameworks — Technical Corrigendum 2
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SIST EN IEC 62056-5-3:2024(Main)
Electrcity metering data exchange - The DLMS/COSEM suite - Part 5-3: DLMS/COSEM application layer (IEC 62056-5-3:2023)
EN IEC 62056-5-3:2023

This part of IEC 62056 specifies the DLMS®/COSEM application layer in terms of structure, services and protocols for DLMS®/COSEM clients and servers, and defines rules to specify the DLMS®/COSEM communication profiles.
It defines services for establishing and releasing application associations, and data communication services for accessing the methods and attributes of COSEM interface objects, defined in IEC 62056-6-2:2021 using either logical name (LN) or short name (SN) referencing.
Annex A (normative) defines how to use the COSEM application layer in various communication profiles. It specifies how various communication profiles can be constructed for exchanging data with metering equipment using the COSEM interface model, and what are the necessary elements to specify in each communication profile. The actual, media-specific communication profiles are specified in separate parts of the IEC 62056 series.
Annex B (normative) specifies the SMS short wrapper.
Annex C (normative) specifies the gateway protocol.
Annex D, Annex E and Annex F (informative) include encoding examples for APDUs.
Annex G (normative) provides NSA Suite B elliptic curves and domain parameters.
Annex H (informative) provides an example of an End entity signature certificate using P-256 signed with P-256.
Annex I (normative) specifies the use of key agreement schemes in DLMS®/COSEM.
Annex J (informative) provides examples of exchanging protected xDLMS APDUs between a third party and a server.
Annex K (informative) lists the main technical changes in this edition of the standard.

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SIST
SIST EN IEC 61158-5-4:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-4: Application layer service definition - Type 4 elements (IEC 61158-5-4:2023)
EN IEC 61158-5-4:2023

IEC 61158-5-4:2023 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 4 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.

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SIST
SIST EN IEC 61158-6-27:2023(Main)
Industrial communication networks - Fieldbus Specifications Part 6-27: Application layer protocol specification - Type 27 elements (IEC 61158-6-27:2023)
EN IEC 61158-6-27:2023

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 27 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 service provided by the different Types of fieldbus Application Layer in terms of
a) an abstract model for defining application resources (objects) capable of being manipulated by users via the use of the FAL service,
b) the primitive actions and events of the service,
c) the parameters associated with each primitive action and event, and the form which they take, and
d) the interrelationship between these actions and events, and their valid sequences.
The purpose of this International Standard is to define the services provided to
a) the FAL user at the boundary between the user and the Application Layer of the Fieldbus Reference Model, and
b) Systems Management at the boundary between the Application Layer and Systems Management of the Fieldbus Reference Model.
This International Standard specifies the structure and services of the IEC fieldbus Application Layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) 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 289 FAL users in standardizing such object behavior. In addition to these services, some supporting services are also defined in this International Standard to provide access to the FAL to control certain aspects of its operation.
1.2 Specifications
[...]
1.3 Conformance
[...]

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SIST
SIST EN IEC 61158-6-2:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-2: Application layer protocol specification - Type 2 elements (IEC 61158-6-2:2023)
EN IEC 61158-6-2:2023

IEC 61158-6-2:2023 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 2 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.

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SIST
SIST EN IEC 61158-5-27:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-27: Application layer service definition - Type 27 elements (IEC 61158-5-27:2023)
EN IEC 61158-5-27:2023

IEC 61158-5-27:2023 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 27 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.

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SIST
SIST EN IEC 61158-5-23:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-23: Application layer service definition - Type 23 elements (IEC 61158-5-23:2023)
EN IEC 61158-5-23:2023

IEC 61158-5-25:2023 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 23 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.

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SIST
SIST EN IEC 61158-6-10:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-10: Application layer protocol specification - Type 10 elements (IEC 61158-6-10:2023)
EN IEC 61158-6-10:2023

IEC 61158-6-10:2023 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 10 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 a 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.

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SIST
SIST EN IEC 61158-5-26:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-26: Application layer service definition - Type 26 elements (IEC 61158-5-26:2023)
EN IEC 61158-5-26:2023

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 2 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 service provided by the Type 2 fieldbus application layer in terms of:
a) an abstract model for defining application resources (objects) capable of being manipulated by users via the use of the FAL service,
b) the primitive actions and events of the service;
c) the parameters associated with each primitive action and event, and the form which they take; and
d) the interrelationship between these actions and events, and their valid sequences.
The purpose of this document is to define the services provided to:
a) the FAL user at the boundary between the user and the application layer of the fieldbus reference model, and
b) Systems Management at the boundary between the application layer and Systems Management of the fieldbus reference model.
This document specifies the structure and services of the Type 2 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) 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 318 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.
1.2 Specifications
[...]
1.3 Conformance
[...]

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SIST EN IEC 61158-5-2:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-2: Application layer service definition - Type 2 elements (IEC 61158-5-2:2023)
EN IEC 61158-5-2:2023

IEC 61158-5-2:2023 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 2 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.

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SIST EN IEC 61158-6-24:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-24: Application layer protocol specification - Type 24 elements (IEC 61158-6-24:2023)
EN IEC 61158-6-24:2023

IEC 61158-6-24:2023 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 24 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.

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SIST EN IEC 61158-6-4:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-4: Application layer protocol specification - Type 4 elements (IEC 61158-6-4:2023)
EN IEC 61158-6-4:2023

IEC 61158-6-4:2023 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 4 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.

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SIST EN IEC 61158-5-10:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-10: Application layer service definition - Type 10 elements (IEC 61158-5-10:2023)
EN IEC 61158-5-10:2023

IEC 61158-5-10:2023 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 10 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.

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SIST EN IEC 61158-5-24:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-24: Application layer service definition - Type 24 elements (IEC 61158-5-24:2023)
EN IEC 61158-5-24:2023

IEC 61158-5-24:2023 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 24 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.

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SIST EN IEC 61158-6-26:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-26: Application layer protocol specification - Type 26 elements (IEC 61158-6-26:2023)
EN IEC 61158-6-26:2023

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 2 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 specifies interactions between remote applications and defines the externally visible behavior provided by the Type 2 fieldbus application layer in terms of
a) the formal abstract syntax defining the application layer protocol data units conveyed between communicating application entities;
b) the transfer syntax defining encoding rules that are applied to the application layer protocol data units;
c) the application context state machine defining the application service behavior visible between communicating application entities;
d) the application relationship state machines defining the communication behavior visible between communicating application entities.
The purpose of this document is to define the protocol provided to
a) define the wire-representation of the service primitives defined in IEC 61158-5-2, and
b) define the externally visible behavior associated with their transfer.
This document specifies the protocol of the Type 2 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545).
1.2 Specifications
The principal objective of this document is to specify the syntax and behavior of the application layer protocol that conveys the application layer services defined in IEC 61158-5-2.
A secondary objective is to provide migration paths from previously-existing industrial communications protocols.
1.3 Conformance
This document does not specify individual implementations or products, nor does it constrain the implementations of application layer entities within industrial automation systems. Conformance is achieved through implementation of this application layer protocol specification.

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SIST EN IEC 61158-5-28:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-28: Application layer service definition - Type 28 elements (IEC 61158-5-28:2023)
EN IEC 61158-5-28:2023

IEC 61558-5-28:2023 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 28 fieldbus. The term "time-critical" is used to represent the presence of a time-window, in which one or more specified actions are required to be completed with some defined level of certainty.

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SIST EN IEC 61158-6-23:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-23: Application layer protocol specification - Type 23 elements (IEC 61158-6-23:2023)
EN IEC 61158-6-23:2023

IEC 61158-6-23:2023 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 23 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.

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SIST EN IEC 61158-6-28:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-28: Application layer protocol specification - Type 28 elements (IEC 61158-6-28:2023)
EN IEC 61158-6-28:2023

IEC 61158-6-28:2023 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 28 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 can cause failure of the applications requesting the actions, with attendant risk to equipment, plant and possibly human life.

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EN IEC 61158-5-2:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-2: Application layer service definition - Type 2 elements
SIST EN IEC 61158-5-2:2023

IEC 61158-5-2:2023 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 2 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.

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EN IEC 61158-5-10:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-10: Application layer service definition - Type 10 elements
SIST EN IEC 61158-5-10:2023

IEC 61158-5-10:2023 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 10 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.

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EN IEC 61158-5-4:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-4: Application layer service definition - Type 4 elements
SIST EN IEC 61158-5-4:2023

IEC 61158-5-4:2023 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 4 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.

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EN IEC 61158-6-4:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-4: Application layer protocol specification - Type 4 elements
SIST EN IEC 61158-6-4:2023

IEC 61158-6-4:2023 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 4 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.

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EN IEC 61158-6-23:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-23: Application layer protocol specification - Type 23 elements
SIST EN IEC 61158-6-23:2023

IEC 61158-6-23:2023 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 23 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.

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EN IEC 61158-6-10:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-10: Application layer protocol specification - Type 10 elements
SIST EN IEC 61158-6-10:2023

IEC 61158-6-10:2023 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 10 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 a 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.

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EN IEC 61158-6-2:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-2: Application layer protocol specification - Type 2 elements
SIST EN IEC 61158-6-2:2023

IEC 61158-6-2:2023 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 2 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.

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    293 pages
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EN IEC 61158-6-26:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-26: Application layer protocol specification - Type 26 elements
SIST EN IEC 61158-6-26:2023

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 2 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 specifies interactions between remote applications and defines the externally visible behavior provided by the Type 2 fieldbus application layer in terms of a) the formal abstract syntax defining the application layer protocol data units conveyed between communicating application entities; b) the transfer syntax defining encoding rules that are applied to the application layer protocol data units; c) the application context state machine defining the application service behavior visible between communicating application entities; d) the application relationship state machines defining the communication behavior visible between communicating application entities. The purpose of this document is to define the protocol provided to a) define the wire-representation of the service primitives defined in IEC 61158-5-2, and b) define the externally visible behavior associated with their transfer. This document specifies the protocol of the Type 2 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545). 1.2 Specifications The principal objective of this document is to specify the syntax and behavior of the application layer protocol that conveys the application layer services defined in IEC 61158-5-2. A secondary objective is to provide migration paths from previously-existing industrial communications protocols. 1.3 Conformance This document does not specify individual implementations or products, nor does it constrain the implementations of application layer entities within industrial automation systems. Conformance is achieved through implementation of this application layer protocol specification.

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EN IEC 61158-6-24:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-24: Application layer protocol specification - Type 24 elements
SIST EN IEC 61158-6-24:2023

IEC 61158-6-24:2023 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 24 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.

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    148 pages
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EN IEC 61158-5-26:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-26: Application layer service definition - Type 26 elements
SIST EN IEC 61158-5-26:2023

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 2 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 service provided by the Type 2 fieldbus application layer in terms of: a) an abstract model for defining application resources (objects) capable of being manipulated by users via the use of the FAL service, b) the primitive actions and events of the service; c) the parameters associated with each primitive action and event, and the form which they take; and d) the interrelationship between these actions and events, and their valid sequences. The purpose of this document is to define the services provided to: a) the FAL user at the boundary between the user and the application layer of the fieldbus reference model, and b) Systems Management at the boundary between the application layer and Systems Management of the fieldbus reference model. This document specifies the structure and services of the Type 2 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) 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 318 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. 1.2 Specifications [...] 1.3 Conformance [...]

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EN IEC 61158-5-23:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-23: Application layer service definition - Type 23 elements
SIST EN IEC 61158-5-23:2023

IEC 61158-5-25:2023 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 23 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.

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    123 pages
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EN IEC 61158-5-24:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-24: Application layer service definition - Type 24 elements
SIST EN IEC 61158-5-24:2023

IEC 61158-5-24:2023 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 24 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.

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    105 pages
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IEC 61158-6-26:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-26: Application layer protocol specification - Type 26 elements

IEC 61158-6-26:2023 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 26 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.

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    206 pages
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IEC 61158-5-4:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-4: Application layer service definition - Type 4 elements

IEC 61158-5-4:2023 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 4 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.

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    71 pages
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IEC 61158-6-2:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-2: Application layer protocol specification - Type 2 elements

IEC 61158-6-2:2023 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 2 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.

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    289 pages
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IEC 61158-6-24:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-24: Application layer protocol specification - Type 24 elements

IEC 61158-6-24:2023 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 24 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.

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    145 pages
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IEC 61158-6-10:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-10: Application layer protocol specification - Type 10 elements

IEC 61158-6-10:2023 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 10 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 a 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.

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    1179 pages
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IEC 61158-6-23:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 6-23: Application layer protocol specification - Type 23 elements

IEC 61158-6-23:2023 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 23 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.

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    309 pages
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IEC 61158-5-2:2023(Main)
Industrial communication networks - Fieldbus specifications - Part 5-2: Application layer service definition - Type 2 elements

IEC 61158-5-2:2023 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 2 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.

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    240 pages
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