现场控制

另外，监控中心的监控主机（PC）和现场控制单元的控制器（PLC）都采用双机冗余热备用方式。

In addition , the host monitor ( PC ) in monitoring center and controller ( PLC ) in local control unit have adopted Dual redundant hot standby mode .

针对多车型多操作模式的复杂控制需求，采用现场控制和上位机监控相结合的控制设计。本章着重研究现场控制部分的设计，对PLC在清洗机控制系统中的应用做了详细描述。

Chapter Five frames the local control system , after detailed research the detailed research multiplex control need , design of software and hardware about the PLC control system of washing machine .

PLC的网络通信在工业现场控制中的应用

Application of Networking Communication Based on PLC in Field Controlling

基于PLC现场控制单元技术的水利枢纽系统应用

The System Application of Hydro Project Based on PLC Site Control Cells Technique

通过标准的智能网络现场控制单元，各种分散的仪表、传感器就能方便地直接连入Internet。

Through the intelligent network control unit , disperse instrument and sensor can conveniently be directly connected to the Internet .

中间层由带以太网接口的现场控制单元设备PLC组成；

The middle layer is composed of the field control unit device PLC with Ethernet interfaces .

现场控制站之间组建了Controllerlink现场网络，并在现场网络上实现了数据共享。

Controller Link network is set up between controlling stations in the field , and the data is shared on it .

应用SPC技术加强化工生产现场控制

Apply the SPC Technology to Tighten Field Control of Chemical Industry Production

PID控制器因其原理清晰、结构简单、实现方便，至今仍广泛应用于工业现场控制领域。

PID controller is still widely used in industrial control fields , because of its clear principle , simple structure , and easily implementation .

灵宝换流站运行人员控制系统介绍该结构使用PLC作为现场控制单元，组态系统作为现场监控单元，通过配置视频卡来记录生产过程，形成了现场控制与监控网络层面。

Operator Control System of Lingbao Converter Station In the system , PLCs perform real control units and PC-based operator control center performs monitor function .

通过串行口访问Modbus现场控制网络

Access Modbus field control network via serial port

通过现场控制FeO技术来保证烧结质量和效益

Through in situ control technology of FeO to guarantee sinter quality

RH分布式微机控制系统是北京清华人工环境工程公司开发的产品，由中央管理工作站、现场控制机、通讯系统三部分组成。

RH distributed microcomputer control system consists of central management working station , field control computer , communication system .

MIC总线是为解决在恶劣环境下数据的管理而开发的一种具有高可靠性的现场控制总线。

MIC bus is a high reliability worksite control bus used for data management under adverse circumstance .

在生产现场控制层面，采用了PROFIBUS现场工业总线，使系统具有良好的可靠性、可扩展性和互操作性。

In working level , Profibus is used , which is advanced in security , expandability and interoperability .

基于QNX的分散控制系统现场控制站软件设计

Software Design Based on QNX of Distributed Control System Process Station

这是因为信息网络（Intranet／Internet）的飞速发展，要求企业从现场控制层到管理层能实现全面、无缝的信息集成，以太网具有这方面的潜力。

The fast development of the Intranet / Internet calls for complete and seamless information integration from field control level to management level in enterprise , for which Ethernet has the potential .

在分散控制系统（DCS）现场控制站的开发中，应用了eXtremeDB数据库，简化了现场控制站软件设计逻辑，缩短了开发周期，提高了系统的稳定性和可靠性，取得了很好的效果。

It is applied to the development of field control station of distributed control system ( DCS ) . The performances show that the design is effective .

根据工况将不同的设备组合成不同的工作流程，以集散控制技术为基础，应用PLC网络实现了对输煤设备的现场控制、电控室控制和中控室控制。

The different equipment is organized to form the certain workflow according to the work status and the PLC network is used to control the port equipment , which achieves three class control .

·针对在中央空调领域的具体应用，提出了分散控制，集中管理的功能模式，设计了基于ARM内核的现场控制单元；

· For the application in the area of Centeral Air Condition , the principle of distributed control and centralized supervisory is presented and Field Control Unit based on ARM kernel is designed .

选用RS-232串口实现单片机与上位机数据通信，较好地模拟了工业现场控制系统。

Data correspondence was realized among the next and the honor computer by choosing RS-232 , the industrial control system is simulated welly .

基于目前机电一体化设备控制系统主要采用国外可编程序控制器（PLC），以及由PLC和工业控制计算机（工业PC）为核心组成的现场控制总线控制系统。

Nowadays , Mechanical and electrical integration control systems are mainly constructed with foreign Programmable Logic Controller ( PLC ) and Field-bus Control System ( FCS ) which use industry computer and foreign PLC as core controller .

集散控制系统（DCS）多为模拟数字混合系统，现场控制系统（FCS）是分步式网络自动化系统。

Distributed control system ( DCS ) belongs to analog digital hybrid system , field control system ( FCS ) is an automatic system with multiple step network .

针对V型滤池净水处理工艺，设计了以冗余PLC为现场控制站、工控机为监控管理机的全厂计算机监控系统。

Aim at the V-filter water treatment process , a monitoring control system is designed for the whole treatment plant , which consists of a supervision management computer and redundancy PLCs that acts as the local control station .

今后十年，模拟与数字的分散型控制系统将被全数字现场控制（FCS）系统更新换代。

In the coming decade , the analog and digital distributed control system will be replaced and updated by full digital field bus system ( FCS ) .

人们既可以通过OPC将现场控制设备的原始数据提供给作为数据的使用者（OPC客户程序）的HMI/SCADA，批处理等自动化程序以及更上层的历史数据库等应用程序；

We can not only supply field aboriginal data to the HMI / SCADA applying program , group disposal program , history database but also linking the applying procedure and physical equipment .

探讨了应用分布式对象计算技术CORBA解决现场控制层与其他层的信息交换问题，提出了基于CORBA的分布式控制系统实现的框架结构。

The author studies the application of CORBA technology in solving the communication between the field control layer and another layer in distributed control system , and presents the framework of the CORBA-based distributed control system .

网络通信方面，详细介绍了如何实现PLC现场控制与DCS远程监控的交互方法，以及数据采集设备与DCS数据共享所必需的TCP/IP与MODBUS之间协议转换的应用程序的开发。

The realization method of field control with PLC and remote supervision and control with DCS is introduced in detail . Then a protocol conversion application between the TCP / IP and the MODBUS is developed .

根据水力压裂施工现场控制特点，提出了两种实用的智能化控制算法：位置式PID控制算法和增量式PID控制算法，描述了算法原理和软件实现。

According to the traits of the field control of the hydraulic fracturing operation , several intelligent control algorithms , such as position PID algorithm and incremental PID algorithm are put forward and the algorithm principle and the software implementation are described .

系统分两个控制层，分别是监控中心工作站和现场控制单元LCU。

The control system is composed of two layers , the management of monitoring center and LCU ( local control unit ) .