DIN EN 61158-6-4:2008
工业通信网络.现场总线规范.第6-4部分:应用层协议规范.4型元件
Industrial communication networks - Fieldbus specifications - Part 6-4: Application layer protocol specification - Type 4 elements (IEC 61158-6-4:2007); English version EN 61158-6-4:2008, only on CD-ROM
- 标准号
- DIN EN 61158-6-4:2008
- 发布
- 2008年
- 发布单位
- 德国标准化学会
- 替代标准
- DIN EN 61158-6-4:2015
- 当前最新
- DIN EN 61158-6-4:2015
- 引用标准
- IEC 61158-3-4 IEC 61158-4-4 IEC 61158-5-4 ISO/IEC 10731 ISO/IEC 7498-1 ISO/IEC 8822 ISO/IEC 8824 ISO/IEC 9545
- 被代替标准
- DIN EN 61158-600:2006 DIN EN 61158-6:2005
- 适用范围
- 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 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. This standard specifies interactions between remote applications and defines the externally visible behavior provided by the Type 4 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 1) define the wire-representation of the service primitives defined in IEC 61158-5-4, and 2) define the externally visible behavior associated with their transfer. This standard specifies the protocol of the Type 4 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498) and the OSI application layer structure (ISO/IEC 9545). 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 61158-5-4. 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 protocols standardized in IEC 61158-6.