產品標題: CC-PAIX02 51405038-475系統模塊備品備件HONEYWELL

型號： CC-PAIX02 51405038-475

品牌： honeywell

詳情資料

分散控制系統(DCS)的主要作用是對生產過程進行控制、監視、管理和決策，因此必須具有很高的可靠性，才能保證工廠的安全、經濟運行。隨著大規模計算機系統和計算機通信網絡的不斷發展，可靠性問題己經成為一個十分重要的問題，其理論也在這種形勢下不斷地發展和完善。可靠性技術的研究內容大致分為四個方面：可靠性設計、可靠性分析、可靠性試驗、可靠性管理。

　　一、DCS系統的可靠性措施

　　在DCS系統中，采用了許多提高可靠性的技術措施。這些技術措施是建立在以下四種基本思想上的：

　　①使系統本身不易發生故障，即所謂的故障預防。

　　②在系統發生故障時盡可能減少故障所造成的影響，即所謂的故障保安和故障弱化。

　　③當系統發生故障時，能夠讓系統繼續運行，即所謂的故障容錯。

　　④當系統發生故障時，可以在不停止系統運行的情況下進行維修，即所謂的在線維修。

　　基于這四種基本思想，DCS系統中采用了各種各樣的可靠性措施降低事故的發生及所造成的損失。

　　1、質量管理和提高系統硬件水平

　　為了實現DCS系統的硬件可靠，DCS系統的制造商采取了一系列提高硬件質量的措施，如對元器件進行嚴格的篩選、老化元器件的降額使用、充分考慮到參數變化的影響、采用低功耗元件、采用噪聲抑制技術等。

2、DCS系統現場設計的可靠性措施

　　DCS出現問題后，將會有無法操作、無法監視等造成設備失控的情況出現。輕者出現設備停運影響經濟效益，重者危及人身和設備的安全。所以在設計中一定要根據現場的具體情況認真的考慮系統以下幾點可靠性：

英文資料

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.

1. 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.

2. Reliability measures for on-site design of DCS system

After DCS issues occur, there will be situations where equipment cannot be operated or monitored, resulting in loss of control. In light cases, equipment shutdown may affect economic benefits, while in severe cases, it may endanger personal and equipment safety. So in the design, the following reliability points of the system must be carefully considered based on the specific situation on site:

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