A4H124-24FX 交换机 DCS系统控制模块 进口工控备件

A4H124-24FX 交换机 DCS系统控制模块 进口工控备件

A4H124-24FX 交换机 DCS系统控制模块 进口工控备件

公司DCS系统前期采用FOXBORO公司生产的I/A系列系统。系统分为三个网段，第一单元和第二单元各为一个网段；公共系统是第一单元和第二单元网段上的级联网段。每个单元和公用系统配置两个Enterasys A4H124-24FX 24接口开关。总线结构适用于只有两个交换机且网络成本低的小型网络。

从表1-3中可以看出，对于电厂过程自动化系统来说，最佳的网络性能属于星形拓扑。然而，在具有高可靠性要求的控制系统中，任何单个网络都无法满足要求，必须利用网络冗余来提高网络的可靠性。在实际工作中，A公司应加强DCS系统的实时监控和运行状态评估，监控和评估程序应包括光纤连接情况、设备老化和网络流量等，这些项目关系到网络通信的质量，通过对系统的有效监控和维护，可以起到保证系统持续安全稳定运行的作用。

未来，在控制器的整体升级中，星型冗余网络应该是首选，它可以更好地满足电厂过程自动化的要求。同时，在第一单元和第二单元之间以及机组的公共系统之间增加了域间隔离三层交换机，以完全隔离网络域之间的广播风暴。

在DCS运行过程中，网络运行是高效可靠的，但许多因素会导致网络故障，包括硬件和软件因素、电源因素和人为因素。对于发电厂DCS系统发生的网络故障，可以以硬件升级、端口配置和结构优化为核心，在此基础上的处理方法，同时还要求对系统进行定期检查和维护，保证系统可靠运行，降低故障率，提高在极端条件下隔离网络故障的能力。通过深入的故障分析，提出了一种可行的网络优化方法，为网络故障诊断和处理提供参考，以确保系统的安全稳定运行。 

A4H124-24FX 交换机 DCS系统控制模块 进口工控备件

In the early stage, the DCS system of A company adopted the I/A series system produced by FOXBORO Company. The system is divided into three network segments, the first unit and the second unit are each one network segment. A public system is a level networking segment on Unit 1 and Unit 2 network segments. Each unit and utility system is configured with two Enterasys A4H124-24FX 24 interface switches. The bus architecture is suitable for small networks with only two switches and low network costs.

As can be seen from Table 1-3, the best network performance for a power plant process automation system belongs to the star topology. However, in a control system with high reliability requirements, no single network can meet the requirements, and network redundancy must be used to improve the reliability of the network. In actual work, Company A should strengthen the real-time monitoring and operation status assessment of DCS system, monitoring and evaluation procedures should include fiber connection, equipment aging and network traffic, etc. These items are related to the quality of network communication, through the effective monitoring and maintenance of the system, can play a role in ensuring the continuous safe and stable operation of the system.

In the future, in the overall upgrade of the controller, the star redundancy network should be the first choice, which can better meet the requirements of power plant process automation. At the same time, an interdomain isolation Layer 3 switch was added between unit 1 and Unit 2 and between the unit's public systems to completely isolate broadcast storms between network domains.

During DCS operation, the network operation is efficient and reliable, but many factors can cause network failure, including hardware and software factors, power factors, and human factors. For the power plant DCS system network failure, you can take hardware upgrade, port configuration and structure optimization as the core, on the basis of this processing method, but also require regular inspection and maintenance of the system, to ensure the reliable operation of the system, reduce the failure rate, improve the ability to isolate network failures under extreme conditions. Through in-depth fault analysis, a feasible network optimization method is proposed to provide reference for network fault diagnosis and treatment, so as to ensure the safe and stable operation of the system.