文献类型：期刊文献

中文题名：通信协议宏在RS-485总线通信中的应用

英文题名：The application of the communication protocol macro in bus communication of RS-485

作者：曹辉[1];霍罡[1];谢满江[1]

第一作者：曹辉

机构：[1]北京联合大学生物化学工程学院

第一机构：北京联合大学生物化学工程学院

年份：2003

卷号：25

期号：11

起止页码：55-58

中文期刊名：制造业自动化

外文期刊名：Manufacturing Automation

收录：CSTPCD

语种：中文

中文关键词：RS-485总线通信;通信协议宏;可编程序控制器;变频器;制冷;空调系统

外文关键词：bus communication of RS-485; PLC; inverter refrigeration; communication proto

摘要：从系统构成和通信软件编程两方面详细介绍了一种基于RS-485通信网络的分散式变频制冷控制系统的设计方案,主要是以富士变频器的RS-485通信协议为基础,利用CX-Protocol软件编写了由设定参数、运行命令和监测数据等3个通信序列构成的RS-485串口通信协议宏,实现了单台OMRON CQM1H可编程序控制器与6台变频器的串行通信控制,并能实时监测各变频器的运行状态,最终达到较好的制冷效果。
The design scheme of a distributed inverter refrigeration control system based on RS-485 communication network is introduced emphatically from system structure and writing communication program. On base of communication protocol of RS-485 used for FUJI inverter, the serial communication protocol macro of RS-485, which always consists of three communication steps including setting communication parameters, running instructions and monitoring data, is developed by means of CX-Protocol. Furthermore, a OMRON CQM1H PLC controls six inverters by serial communication and monitors real-time the running status of all inverters. Finally the result of refrigeration is good.