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CEI - EN 61158-6-2

Industrial communication networks - Fieldbus specifications Part 6-2: Application layer protocol specification - Type 2 elements

inactive
Organization: CEI
Publication Date: 1 February 2016
Status: inactive
Page Count: 268
ICS Code (Networking): 35.110
ICS Code (Application layer): 35.100.70
ICS Code (Industrial process measurement and control): 25.040.40
scope:

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 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 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 standard 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 standard 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).

Specifications

The principal objective of this standard 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.

Conformance

This standard 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.

Document History

February 1, 2020
Industrial communication networks - Fieldbus specifications Part 6-2: Application layer protocol specification - Type 2 elements
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...
EN 61158-6-2
February 1, 2016
Industrial communication networks - Fieldbus specifications Part 6-2: Application layer protocol specification - Type 2 elements
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...
April 1, 2009
Industrial communication networks - Fieldbus specifications Part 6-2: Application layer protocol specification - Type 2 elements
Pur non contenendo rilevanti modifiche di natura tecnica, in questa edizione si sono cancellati i bus di campo di Tipo 6, che erano di poco interesse, mentre si sono aggiunti altri Tipi di bus di...

References

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