基于串行数据采集的燃气门站计量工艺研究  

The Research of Measurement Processes for Gas Station by Serial Data Acquisition Method

作　　者：蒋天伟[1,2] 赵京涛[3] 刘凯 牛虎勋 

机构地区：[1]河北工业大学,天津300130 [2]新地能源工程技术有限公司,河北廊坊065001 [3]廊坊师范学院,河北廊坊065001

出　　处：《廊坊师范学院学报（自然科学版）》2009年第5期19-21,共3页Journal of Langfang Normal University(Natural Science Edition)

摘　　要：在天然气门站自动控制系统中,基于串行通讯的工艺节点数据采集已得到广泛应用。文章提出了面向天然气门站流量计量,基于PLC测控系统的串行通讯数据采集问题,给出流量计布局方式、串行通讯数据采集系统结构及MODBUS通信协议的PLC数据采集实现方法,对于RS—485总线串行数据采集的PLC自动测控系统的构建有一定的指导意义。In the automatic control system for gas station , The process is widly to be used based serial communication data acquisition. In this paper, faced flow quantity monitoring and measurement in the gas station, based serial communication data acquisition problems by PLC measurement and control system, it is given the way to layout of the flowmeters, the architecture of serial communications systems, and modbus protocol of the PLC data acquisition, it is important to make up PLC data acquisition System for automatic monitoring and control by RS - 485 network or extend.

关 键 词：数据采集 串行通讯 MODBUS协议 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构] TE863.1[自动化与计算机技术—计算机科学与技术]