ABB DT370A-S 订货号GJR2316500R0001德国基尔总成

　　层次控制试图同时将计算机应用于所有工厂控制情况。因此，它需要的计算机和最精密的自动控制设备来整合从高层管理决策到阀门运行的各个层面的工厂运营。

　　与前面描述的传统控制系统相比，数字计算机提供的优势是成本相同，计算机可以很容易地编程以执行各种不同的任务。此外，如果流程的性质发生变化或先前提议的系统证明不适合所提议的任务，则更改程序以执行新的或修订的一组任务是相当容易的。使用数字计算机，这通常可以在不改变控制系统的物理设备的情况下完成。对于传统的控制案例，必须更换控制系统的部分物理硬件设备，才能实现新的功能或新的实现。

　　控制系统已成为现代生产线自动化的主要组成部分工厂。自动化始于 1940 年代后期，随着传输机的开发，传输机是一种用于在生产线上移动和定位大型物体（例如，部分完成的汽车发动机组）的机械设备。这些早期的机器没有如上所述的反馈控制。相反，任何最终调整位置或其他必要的纠正措施都需要人工干预。由于它们的大尺寸和成本，需要长时间的生产来证明使用传送机的合理性。

　　需要减少制成品的高劳动力含量，需要处理小得多的生产运行，希望获得更高的制造精度，结合由于在制造过程中需要对产品进行复杂的测试，因此最近开发了计算机化生产监视器、测试设备和反馈控制的生产机器人。数字计算机处理广泛任务的可编程性以及快速更改新程序的能力使其对于这些目的非常宝贵。同样，为了补偿刀具磨损和自动加工操作中的其他变化的影响，需要建立刀具定位和切削速度的反馈控制来代替以前使用的直接机械运动。同样，结果是更地完成最终产品，工具或制造机器损坏的机会更少。

　　以下是我司【主营产品】，有需要可以发来帮您对比下价格哦!

　　主营：世界品牌的PLC 、DCS 系统备件 模块

　　①Allen-Bradley(美国AB)系列产品》

　　②Schneider(施耐德电气)系列产品》

　　③General electric(通用电气)系列产品》

　　④Westinghouse(美国西屋)系列产品》

　　⑤SIEMENS(西门子系列产品)》

　　⑥销售ABB Robots. FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、Panasonic Robots、MOTOMAN Robots。

　　⑦estinghouse(西屋)： OVATION系统、WDPF系统、MAX1000系统备件。

　　⑧Invensys Foxboro(福克斯波罗)：I/A Series系统，FBM(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。Invensys Triconex: 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。

　　⑨Siemens(西门子)：Siemens MOORE， Siemens Simatic C1，Siemens数控系统等。

　　⑩Bosch Rexroth(博世力士乐)：Indramat，I/O模块,PLC控制器,驱动模块等。

　　◆Motorola(摩托)：MVME 162、MVME 167、MVME1772、MVME177等系列。

　　PLC模块，可编程控制器，CPU模块，IO模块，DO模块，AI模块，DI模块，网通信模块，

　　以太网模块，运动控制模块，模拟量输入模块，模拟量输出模块，数字输入模块，数字输出

　　模块，冗余模块，电源模块，继电器输出模块，继电器输入模块，处理器模块。

　　我们的优势是：全新原装，，供给一年质保!本公司所有产品都经过严格检测，欢迎询价，收购。只需您有诚心，本公司将会给你供给一个比同行优势的价格，共同拿下单子。

　　Hierarchy control attempts to apply computers to all the plant-control situations simultaneously. As such, it requires the most advanced computers and most sophisticated automatic-control devices to integrate the plant operation at every level from top-management decision to the movement of a valve.

　　The advantage offered by the digital computer over the conventional control system described earlier, costs being equal, is that the computer can be programmed readily to carry out a wide variety of separate tasks. In addition, it is fairly easy to change the program so as to carry out a new or revised set of tasks should the nature of the process change or the previously proposed system prove to be inadequate for the proposed task. With digital computers, this can usually be done with no change to the physical equipment of the control system. For the conventional control case, some of the physical hardware apparatus of the control system must be replaced in order to achieve new functions or new implementations of them.

　　Control systems have become a major component of the automation of production lines in modern factories. Automation began in the late 1940s with the development of the transfer machine, a mechanical device for moving and positioning large objects on a production line (e.g., partly finished automobile engine blocks). These early machines had no feedback control as described above. Instead, manual intervention was required for any final adjustment of position or other corrective action necessary. Because of their large size and cost, long production runs were necessary to justify the use of transfer machines.

　　The need to reduce the high labour content of manufactured goods, the requirement to handle much smaller production runs, the desire to gain increased accuracy of manufacture, combined with the need for sophisticated tests of the product during manufacture, have resulted in the recent development of computerized production monitors, testing devices, and feedback-controlled production robots. The programmability of the digital computer to handle a wide range of tasks along with the capability of rapid change to a new program has made it invaluable for these purposes. Similarly, the need to compensate for the effect of tool wear and other variations in automatic machining operations has required the institution of a feedback control of tool positioning and cutting rate in place of the formerly used direct mechanical motion. Again, the result is a more accurately finished final product with less chance for tool or manufacturing machine damage.