標準號：DIN EN 61158-6-7-2008
中文標準名稱：工業通訊網絡.現場總線規范.第6-7部分:應用層協議規范.7型元件.僅為CD-ROM
英文標準名稱：Industrial communication networks - Fieldbus specifications - Part 6-7: Application layer protocol specification - Type 7 elements (IEC 61158-6-7:2007); English version EN 61158-6-7:2008, only on CD-ROM
標準類型：N18;P76
發布日期：1999/12/31 12:00:00
實施日期：2008/9/1 12:00:00
中國標準分類號：N18;P76
國際標準分類號：35.100.70;35.160
引用標準：IEC 60559;IEC 61158-3-7;IEC 61158-4-7;IEC 61158-5-7;ISO/IEC 7498-1;ISO/IEC 8824;ISO/IEC 8825;ISO/IEC 9506-2;ISO/IEC 9545
適用范圍：This standard provides common elements for basic time-critical and non-time-critical messagingcommunications between application programs in an automation environment and material specificto Type 7 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 ofcertainty. Failure to complete specified actions within the time window risks failure of theapplications requesting the actions, with attendant risk to equipment, plant and possibly human life.This standard specifies interactions between remote applications and defines the externally visiblebehavior provided by the Type 7 fieldbus application layer in terms ofa) the formal abstract syntax defining the application layer protocol data units conveyed betweencommunicating application entities;b) the transfer syntax defining encoding rules that are applied to the application layer protocol dataunits;c) the application context state machine defining the application service behavior visible betweencommunicating application entities;d) the application relationship state machines defining the communication behavior visible betweencommunicating application entities.The purpose of this standard is to define the protocol provided to? define the wire-representation of the service primitives defined in IEC 61158-5-7, and? define the externally visible behavior associated with their transfer.This standard specify the protocol of the Type 7 fieldbus application layer, in conformance with theOSI 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 layerprotocol that conveys the application layer services defined in IEC 61158-5-7.A secondary objective is to provide migration paths from previously-existing industrialcommunications protocols. It is this latter objective which gives rise to the diversity of protocolsstandardized in parts of the IEC 61158-6 series.