基于OPC的第三方设备数据采集系统的设计与实现

在当前工业控制系统中,DCS系统与第三方设备进行通信时,必须开发对应的设备驱动程序;当DCS系统升级时,设备驱动也必须进行相应升级,从而增加了升级和维护成本。为此,提出了基于OPC的第三方设备数据采集系统(COMMOPC系统)。该系统由主框架和I/O驱动组成,I/0驱动为主框架提供统一的通信调用接口,主框架部分通过接口的调用来实现对设备I/0的统一管理、调度和通信信息的集中监视,并提供通用OPC Server接口,使上层应用系统通过OPC Client可实时地访问现场设备,解决了设备驱动程序与DCS系统必须一一对应的问题。

Design and implementation of data collection system from the third-party devices based on OPC

In the current industrial control systems,when DCS systems communicate with the third-party devices,we must develop the corresponding the device driver,when the DCS system upgrade,the device driver must be upgraded accordingly,it will inevitably increase the cost of upgrades and maintenance.In this background,this paper presents a third-party devices OPC-based data collection system(COMMOPC system).The COMMOPC system consists of the main framework and I/O drivers,I/O drivers provide unified interface to the main framework,the main framework call the interface to implement unified management and scheduling and surveillance to the I/O drivers,and provide the general OPC Server interface.The upper level through the OPC client applications to access realtime field devices to solve the corresponding problem of the device driver and the DCS system.