GB/T 21099.2-2007 in English

《GB/T 21099.2-2007过程控制用功能块 第2部分：功能块概念及电子设备描述语言的规范》由TC124（全国工业过程测量控制和自动化标准化技术委员会）归口，TC124SC2（全国工业过程测量控制和自动化标准化技术委员会控制仪表及装置、工业控制计算机系统分会）执行，主管部门为中国机械工业联合会。
GB/T 21099的本部分规定了电子设备描述语言，包括通用功能块(FB)定义和EDD模型、详细的块定义、FB环境、对系统管理的映射、对通信的映射、一致性陈述等内容。

Scope

This part of GB/T 21099 specifies the Electronic Device Description Language (EDDL), which is applicable to process control function blocks (FB). This part of GB/T 21099 considers the following factors to specify the function block (FB). a) The equipment model defines equipment components consistent with this standard. b) FB conceptual specification for measurement, execution and processing. It includes general rules for supporting the essential characteristics of control, avoiding details that impede innovation, and avoiding the specialization of different fields. c) Electronic Device Description Language technology that enables the integration of existing product details using engineering lifecycle tools. This part only defines a subset of GB/T 21099.1, and GB/T 21099.1 describes the general theory of the system aspect of the distributed system. Appendix B contains conformance statements relevant to this standard. The requirements in GB/T 21099.1 are not included in these declarations of conformity. FB is completed at the abstract level, which allows a variety of technologies to provide the definition of common features in a unique way, and also allows some supplementary feature definitions that meet user needs and that are expected to be implemented in the future. This abstraction is referred to here as a conceptual FB specification, and is mapped by industry organizations to specific communication systems and their additional definitions. This part is also based on the abstract definition of GB/T19769.1-2005. FDDL is intended to fill the gap between the conceptual FB specification and the actual product implementation. It allows manufacturers to use the same description method to describe devices based on different technologies and platforms. Figure 1 shows these aspects.