文档介绍：深圳稻草人自动化培训
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-制系统。在此系统中，现场总线通信技术至关重要。本文就某水利站分布式控制系统工程，介绍上海泗博自动化的Modbus转Profibus-DP协议网关设备的应用。 
二、系统组成 
1、系统结构 
本系统构成如图1，其中略去了西门子S7-300PLC之外的其它现场级控制设备。系统上位机采用横河CS3000型DCS集散控制系统，实现对整个水利工程进行集中监控。下位机之一采用的是西门子S7-300系列PLC，实现对现场各种智能仪表，包括现场电机、智能开关、变频器、传感器等执行、检测设备的启停控制、信息采集等操作。横
深圳稻草人自动化培训
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
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