3BHB007211R101 XVC768101 贝利ABB 进口卡件 原厂

3BHB007211R101 XVC768101 贝利ABB 进口卡件 原厂

1、系统配置的工作内容

    DCS的发展使系统配置的适应性越来越强，而且也囊括了PLC控制功能，从几个、十几个回路的小系统到几百个、几千个回路的大系统都可以实现。系统配置的原则应是在满足装置生产和控制要求的前提下尽量减少硬件的数量，以求经济合理，并留有恰当的余量。系统配置工作主要包括以下几个方面。

    （1）系统I/O点统计：一般包括10-15%的备用量。要分别考虑热备用和冷备用的情况。

    （2）控制站：凡是参与控制的变量或重要的监视变量，考虑进入控制站。I/O卡件种类和数量按I/O点统计表的数量确定。机柜具有10%的备用空间。主控单元冗余配置、内部网络冗余配置、控制I/O卡冗余配置，电源冗余配置，按1秒的标准扫描周期估计系统负荷满足DCS具体要求，考虑现场变送器供电制式与DCS的关联。

    （3）监视站：对于有监视站的系统，可以考虑一些仅需要监视的点数到监控站中。但监视站一般不是冗余配置。

1. Work content of system configuration

The development of DCS makes the system configuration more and more adaptable, and also includes PLC control functions, from a few, a dozen circuits of small systems to hundreds of thousands of circuits of large systems can be realized. The principle of system configuration should be to minimize the number of hardware under the premise of meeting the requirements of device production and control, in order to be economical and reasonable, and leave an appropriate margin. System configuration mainly includes the following aspects.

(1) System I/O point statistics: generally includes 10-15% of the reserve volume. The case of hot reserve and cold reserve should be considered separately.

(2) Control station: All variables involved in control or important monitoring variables, consider entering the control station. The type and number of I/O cards are determined by the number of I/O points in the statistics table. The cabinet has 10% spare space. Master control unit redundancy configuration, internal network redundancy configuration, control I/O card redundancy configuration, power supply redundancy configuration, according to the standard scan cycle of 1 second to estimate the system load to meet the specific requirements of DCS, considering the correlation between the field transmitter power supply system and DCS.