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本文介绍了油田集散控制系统的总体结构及其通讯网络结构,并且结合OMRON C200Ha系列可编程控制器的特点,详细阐述了下位机PLC的串行通讯机制以及其与上位机通讯程序的设计方法。
In this paper, the overall structure of oil field distributed control system and its communication network structure are introduced. Based on the characteristics of OMRON C200Ha series programmable logic controller, the serial communication mechanism of lower computer and the design method of its communication program with host computer are expounded in detail.