过程控制工程的表示——P&I图中的请求以及P&ID工具和PCE-CAE工具之间的数据交换

[中文适用范围]： 本国际标准规定了如何在 PID 中表示过程控制工程请求，以便在 PID 和 PCE 工具之间自动传输数据，并避免误解 PCE 的图形 PID 符号。它还定义了过程控制工程工具和PID工具之间通过数据传输语言(称为CAEX)交换过程控制工程请求相关数据。这些规定适用于此类工具的出口/进口应用。 PID 中 PCE 功能的表示将由最少数量的规则来定义，以清楚地指示其类别和处理功能，独立于实现技术（参见第 6 条）。过程设备图形符号的定义（例如容器@阀门@柱子@等）@它们的实施和参考指定系统的规则不在本标准的范围内。这些规则独立于本标准。第 7 条指定了不同工具和数据模型 CAEX 之间的数据流。 [外文原描述]： IEC 62424:2016 specifies how process control engineering requests are represented in a P&ID for automatic transferring data between P&ID and PCE tool and to avoid misinterpretation of graphical P&ID symbols for PCE. It also defines the exchange of process control engineering request relevant data between a process control engineering tool and a P&ID tool by means of a data transfer language (called CAEX). These provisions apply to the export/import applications of such tools. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. It is a compatible extension of the first edition. The main changes and extensions are: - updated definitions and new definitions; - identification replaced with reference designation; - updated PCE categories and process functions; - CAEX version 3.0, introduction of: native multiple role support; - nested interfaces; - life cycle meta information; - a separate Attribute library; - updated examples; - updated electronic data model of the PCE request: new normative attribute library for basic PCE request attributes; - new informative extended attribute library for further PCE request attributes; - new informative electronic data model for the PCE request.