CC-PCF901 51405047-175AI模块

产品标题: CC-PCF901 51405047-175AI模块接线端子

型号： CC-PFB401 51405044-175

品牌： 霍尼韦尔

                                                                                 产品详情资料：

分散控制系统(DCS)的主要作用是对生产过程进行控制、监视、管理和决策，因此具有很高的可靠性，才能保证工厂的经济运行。随着大规模计算机系统和计算机通信网络的不断发展，可靠性问题己经成为一个十分重要的问题，其理论也在这种形势下不断地发展和完善。可靠性技术的研究内容大致分为四个方面：可靠性设计、可靠性分析、可靠性试验、可靠性管理。

　　一、DCS系统的可靠性措施

　　在DCS系统中，采用了许多提高可靠性的技术措施。这些技术措施是建立在以下四种基本思想上的：

　　①使系统本身不易发生故障，即所谓的故障预防。

　　②在系统发生故障时尽可能减少故障所造成的影响，即所谓的故障保安和故障弱化。

　　③当系统发生故障时，能够让系统继续运行，即所谓的故障容错。

　　④当系统发生故障时，可以在不停止系统运行的情况下进行维修，即所谓的在线维修。

　　基于这四种基本思想，DCS系统中采用了各种各样的可靠性措施降低事故的发生及所造成的损失。

　　质量管理和提高系统硬件水平

　　为了实现DCS系统的硬件可靠，DCS系统的制造商采取了一系列提高硬件质量的措施，如对元器件进行严格的筛选、老化元器件的降额使用、充分考虑到参数变化的影响、采用低功耗元件、采用噪声抑制技术等。

                          产品英文详情资料：

The main function of a distributed control system (DCS) is to control, monitor, manage, and make decisions during the production process. Therefore, it must have high reliability to ensure the safe and economic operation of the factory. With the continuous development of large-scale computer systems and computer communication networks, reliability has become a very important issue, and its theory has also been continuously developed and improved in this situation. The research content of reliability technology can be roughly divided into four aspects: reliability design, reliability analysis, reliability testing, and reliability management.

1、 Reliability Measures for DCS System

In the DCS system, many technical measures have been adopted to improve reliability. These technical measures are based on the following four basic ideas:

① Making the system itself less prone to malfunctions is known as fault prevention.

② When a system malfunctions, minimize the impact of the malfunction as much as possible, known as fault security and fault weakening.

③ When a system malfunctions, it can continue to operate, known as fault tolerance.

④ When a system malfunctions, maintenance can be carried out without stopping the system operation, known as online maintenance.

Based on these four basic ideas, various reliability measures have been adopted in the DCS system to reduce the occurrence of accidents and the resulting losses.

Quality management and improvement of system hardware level

In order to achieve hardware reliability of the DCS system, manufacturers of the DCS system have taken a series of measures to improve hardware quality, such as strict screening of components, derating of aging components, fully considering the impact of parameter changes, using low-power components, and adopting noise suppression technology.

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