工业通信网络.现场总线规范.第6-10部分:应用层协议规范.第10类元件

[中文适用范围]： 本部分规定了工业通信网络-现场总线规范第6-10部分的应用层协议规范-10型要素。它定义了属于PROFINET IO系统的10型元素的协议规范，包括通用协议规范、 decentralized periphery（分布式外围设备）的协议规范，以及相关的服务、状态机、传输语法和编码规则。 [外文原描述]： IEC 61158-6-10:2019 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. The purpose of this document is to define the protocol provided to a) define the wire-representation of the service primitives defined in this document, 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). This fourth edition includes the following significant technical changes with respect to the previous edition: a) integration of system redundancy basic functionality; b) integration of dynamic reconfiguration basic functionality; c) integration of reporting system basic functionality; d) integration of asset management basic functionality; e) integration of media redundancy ring interconnection basic functionality.