ABB发明、制造了众多产品和技术，其中包括全球三相输电系统、世界上自冷式变压器、高压直流输电技术和电动工业机器人，并率先将它们投入商业应用。ABB拥有广泛的产品线，包括全系列电力变压器和配电变压器，高、中、低压开关柜产品，交流和直流输配电系统，电力自动化系统，各种测量设备和传感器，实时控制和优化系统，机器人软硬件和仿真系统，高效节能的电机和传动系统，电力质量、转换和同步系统，保护电力系统安全的熔断和开关设备。这些产品已广泛应用于工业、商业、电力和公共事业中。
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主营产品，备件供应，充足库存
Foxboro（福克斯波罗）：I/A Series系统，FBM全系列（现场输入/输出模块）
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、
数据通信及处理等。
Westinghouse（西屋）：1C31系列DCS系统、CPU、OVATION系统、WDPF系统、
WEStation系统备件。
Triconex（英维思）:冗余容错控制系统、基于三重模件冗余（TMR）结构的现代化的容错控制器。
EMERSON（艾默生）:模块、卡件、驱动器等各类备件。
XYCOM：XVME系列
Bently（本特利）：3500/3300系统。
Rockwell（罗克韦尔）：ICS系统。
ABB：PM全系列DCS系统、IGCT高压变频器系列、工业机器人备件DSQC系列、INFI 90等。
Bailey（贝利）：BRC系列DCS系统等。
Allen-Bradley：1756、1785、1771、1746全系列系统等。
Yokogawa（横河）：CP系列等。
Honeywell（霍尼韦尔）：TK/TC/CC系统等。
Reliance（瑞恩）：57C系列等。
Schneider（施耐德）：140系列处理器、控制卡、电源模块等。
Modicon（莫迪康）：AS系列PLC系统备件。
Siemens(西门子)：6ES5/6ES7414/6ES7415/6ES7416系列PLC系统备件、
Siemens MOORE，Siemens Simatic C1，Siemens数控系统等。
Motorola（摩托罗拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。
XYCOM：I/O、VME板和处理器等。
GE（通用电气）：IC698/IC697全系列PLC系统、模块、卡件、驱动器等各类备件。
Yaskawa（安川）：伺服控制器、伺服马达、伺服驱动器。
Bosch Rexroth（博世力士乐）：Indramat，I/O模块,PLC控制器,驱动模块等。
Woodward（伍德沃德）：SPC阀位控制器、PEAK150数字控制器。
How to choose between PLC and DCS depends on the specific project and plant type. Because of different applications, the requirements of the control system are also different.
In addition to some basic criteria, we must also consider the installation, scalability, maintenance and other factors. Sometimes, one choice is very suitable for a factory, and in another case it may not be. Therefore, the more factors considered in the selection of control system, the more conducive to the realization of short-term and long-term goals.
At present, although PLC system may be the most cost-effective for small equipment, DCS system provides more economical scalability and is more likely to obtain higher initial return on investment.
PLC is suitable for discrete production, generally composed of separate production devices, mainly used to complete the assembly of components, such as labeling, filling or grinding. DCS is suitable for process manufacturing. Automated systems are often used to produce by recipe rather than by piece in a continuous and batch manner. Large scale continuous processing equipment, such as refineries and chemical plants, all use DCS system. Mixed application usually uses PLC and DCS at the same time.
■ process scale:
Small system (<300 i / o points) may have less budget, so plc is more suitable. dcs has a global database, which is easier to manage and upgrade, and can play a more important role in large factory applications.
■ upgrade plan:
PLC system can be selected for small-scale industrial process, but if the process needs to be expanded or upgraded, more PLC hardware and database need to be added, and independent maintenance is needed. This process is time-consuming and laborious, and prone to errors. At this time, DCS is more suitable. As DCS is easier to upgrade, it can also manage users&＃39; trust from the central hub, so it is easier for later maintenance.
Integration requirements:
For stand-alone device, PLC is the ideal choice. When the factory configures multiple PLCs, it will produce the requirement of interconnection. This is generally difficult to implement because it is usually necessary to map data using communication protocols. Especially when the user needs to change, once a PLC system is changed, the two PLCs may not communicate normally. DCS does not need mapping, configuration change is just a simple process, the controller is the system&＃39;s own.
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