940流量计在污水计量管理系统中的应用

Application of 940 Flow Meter in Wastewater Measurement Management System

介绍了在易燃易爆场合下,如何通过网络通信的方法解决中石化武汉分公司各车间污水远程计量和管理问题。系统采用940本安型流量计作为污水计量仪表,通过串口无源收发器实现将流量计信号远传至车间,在车间配置端口服务器,使流量计具有了实时响应、远程管理及数据访问能力,通过厂级网络系统,实现了有关管理部门对污水数据的采集、分析、保存以及在局域网内发布等要求。叙述了系统的特点、组成,工作原理等,重点是基于MODBUS通信协议下无源隔离远传的网络通信。经过2年来的实际运行,系统工作稳定,得到了用户的肯定和好评。

The paper introduces the method concerning resolving the remote waste water measurement and management issues occurring in each workshop of China Petrochemical Co. Ltd Wuhan Branch through network communication. The 940 Intrinsically Safe Flow Meter is to measure the wastewater and the flow meter signal is transferred to the workshops by serial passive transceiver. The flow meter possesses the function of real time response, remote management and data access ability with installing the port server in workshops. Data acquisition, analysis, save and LAN inner release of wastewater data could meet the requirements of the plant network system. The essay illustrates the features, structure, work principle of the system, and especially focusing on the passive isolation telemetering network communication based on MODBUS communication protocol. The system has been confirmed to be stable during the operation for two years and the system has achieved the good reputation from the clients.