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基于数据“点”数、数据要求的更新速度、数据大小、数据类型和设备厂家要求,海阳核电一期工程打包系统与DCS的接口设计采用了以下四种方案:硬接线、以太网Modbus数据链接、串行通信Modbus数据链接和Profibus数据链接。硬接线使用“一线一点”通信,可靠性高。这种接口方式主要用于就地设备重要报警信息以及DCS发出的关键控制命令;数据链接使用“一线多点”通信,传送效率高。这种接口方式主要用于打包系统“点数”较多的情况。在工程实施过程中,经常出现打包系统与DCS不能建立通信的问题。此外,打包系统微处理器基于的PLC硬件和软件众多,给设备的维护带来了挑战。经过调试,DCS和打包系统之间实现了良好的数据传递。本文将重点介绍四种接口设计方案及其选择流程,以便为其他工程项目提供参考。
Based on the data “dot ” number, the update speed of data requirements, data size, data type and equipment manufacturers requirements, the Haiyang Nuclear Power Phase I project packaging system and DCS interface design uses the following four programs: hard wiring, Ethernet Modbus data link, serial communication Modbus data link and Profibus data link. Hard-wired using “a little bit ” communication, high reliability. This interface mode is mainly used for critical alarm information of local equipment and the key control commands issued by DCS; the data link uses “multi-line” communication, which has high transmission efficiency. This interface is mainly used for packing system “points ” more situations. In the project implementation process, the packaging system and DCS can not always establish communication problems. In addition, packaged system microprocessors are based on numerous PLC hardware and software that pose challenges to equipment maintenance. After debugging, DCS and packaging system to achieve a good data transfer. This article will focus on four interface design options and their selection process, in order to provide reference for other projects.