IEC 61158-6-2-2019 工业通信网络--现场总线规范--第6-2部分:应用层协议规范--类型2要素 Industrial communication networks - Fieldbus specifications - Part 6-2: Application layer protocol specification - Type 2 elements
- 标准类别:
- 标准大小:
- 标准编号:IEC 61158-6-2-2019
- 标准状态:现行
- 更新时间:2023-08-19
- 下载次数:次
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.dition 4.0 2019-06
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-2: Application layer protocol specification – Type 2 elements
IEC 61158-6-2:2019-06(en)
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright ? 2019 IEC, Geneva, Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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