It provides various kinds of function , such as flow chart , real time dynamic display , real time and historical trend chart , alarm , report , data logging , parameter setting etc . the function of flow calculation and compensation , data acquisition and storage , communication is also provided in flow calculator 计算机实现hmi人机接口和数据管理平台，具有工艺流程图、实时动态显示、实时和历史趋势图、报警、报表、数据记录、参数设定等功能。积算单元固化有流量计量专用软件和通讯软件，实现数据采集、计算、补偿、存储、通讯等功能。
This simulation software consists of following functions : the design of chemical equipment and chemical techniques , calculation , data management and so on . in this paper , we chiefly finished system analysis , main framework construct , data structure design , graphic edit and framework interaction functions and main user interfaces design 本论文主要完成了系统的需求分析，框架建立、数据结构设计、图形编辑、框架交互、主要界面设计等几部分工作，使软件实现了设备的选型与设计、工艺流程图编辑等主要功能。
Plc is widely used in automatic control for its strong function , high reliability , wide applicability , modular structure and etc . many customer services , such as showing process - flow charts , displaying dynamic - data - base interfaces , editing tables , generating charts , managing production and etc , can be provided by connecting personal computers ( pcs ) to a plc network . in a plc - pc system , plcs , which serves as the low - level units , are used to collect and control the data , ( for example , the on / off quantities and analog input / output quantities ) 把个人计算机连入plc网络可以向用户提供诸如工艺流程图显示、动态数据画面显示、报表编制、趋势图生成、窗口技术以及生产管理等多种功能，作为底层单元的plc完成对现场开关量、模拟输入输出量的控制处理，而利用微型计算机良好的人机对话界面和数据处理功能，实现对一台或多台plc进行监控，充分发挥plc可靠、灵活的控制性能和计算机在管理、监控等方面的优势，提高控制系统的整体自动化程度。
