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分级控制技术可***不同区域的报警是独立的，对于每个区域的报警监测使用不同的报警器，能够***在检测范围内出现异常情况时及时报警以引起操作人员的注意。

DCS过程报警分级控制技术可有效提升操作现场的安全性，有力保障施工人员和企业的安全。本文基于DCS 的概念和特点，研究了有毒有害气体报警和关键操作参数报警的应用，以期为该领域学者提供参考。

01 DCS多层分级控制系统

DCS的基本设计思想是采用控制分散、操作和管理集中的思路，实现多层分级控制和合作的结构。目前，主要应用在冶金、电力和石化等领域。

DCS 是实现多层分级控制的系统，在使用的过程中具有两个基本的分级环节：现场控制单元和操作站。

DCS基本分级环节

● 现场控制单元：

指远离控制中心而在现场附近使用的控制系统，可根据DCS本身机构实现对现场的监控和控制。现场控制单元的使用需要准备不同的设备，如配置插件，即根据系统的要求配置相应的中央处理器插件、电源插件和通信插件等，为后期的分级控制奠定基础；

冗余配置是分级控制系统中重要的环节之一，在配置的过程中要对主机插件、电源插件和通信插件等实现冗余配置；实现随现场的分级控制和监测需要对不同的硬件添加DCS，确保分级控制的可靠性。

● 操作站：

操作站中记录并显示控制系统中的不同数据，是展示人机交互的场所，常用的操作站中包括系主机控制、显示设备和键盘输入设备等，是主要使用人工操作记录和反馈的场所，主要实现显示不同数据、报警和操作等多种重要功能。

02 DCS过程报警分级控制技术应用

有毒有害气体报警

通过对不同的DCS过程报警分级控制技术的***，现阶段现场工作使用的DCS装置探测报警主要针对有毒、有害和可燃性的气体，当检测到这几种气体出现时就会产生报警的行为。市场上的报警器具有多元化的特点，要***DCS正常的工作要使用具有规范性的报警器。

型号：

ABB(S800系列）

英维思(3008, 3625, 3508E. 3721, 3700A 4351B)

本特利(3500/42M， 3500/ 22M, 3500/95.3500/05)

黑马(F3330, F3236, F6217, F7126, F8621A)

福克斯波罗(FBM203, FBM204, FBM217, FMB231)

AB: (1746 1747 1756 1770 1771 1785 触摸屏2711系列CPU PLC) .

普罗索芙特PROSOFT MVI46/56/69, AB旗下，跟AB很像,模块

横河YOKOGAWA AAI, ADV, ADI, ANB, AMM, SB, PW(型号开头),卡件模块(CPU,电源,输出，PLC)

摩尔MOORE Q开头, 3开头模块,显示器

It must be able to provide power supply for monitors and other connecting parts that monitor toxic and harmful gases;

● After detecting toxic and harmful gases, it can send out appropriate alarm signals until someone finds them, greatly improving the effectiveness of the alarm function;

● The range of combustible gas monitoring shall be within the normal explosion range;

● Adapt to the concentration and measurement range of toxic and harmful gases to ensure that the presence of harmful gases can be detected within the normal range;

● Indication alarm equipment is more important, and is the key to determine whether it can alarm correctly. In the process of selection and purchase, alarm equipment with fire protection equipment and interlocking protection functions shall be selected;

● The alarm shall have independent monitoring and alarm functions to ensure that each alarm only monitors toxic and harmful gases within its scope of responsibility;

● The installed alarm shall have the function of continuous alarm. If the leakage of toxic and harmful gases is found during use, the alarm function shall be started. When the concentration is reduced, the alarm shall also give continuous alarm to ensure that the leakage of toxic and harmful gases is found in time.The alarm is the key to the hierarchical alarm control technology. During the use of the modern DCS process alarm hierarchical control technology, the responsible personnel can select and use the alarm according to the above principles to ensure the safety and standardization of the control site.

Key operating parameter alarm

Each parameter in the DCS process alarm hierarchical control technology using the computer control system needs to be strictly set and controlled. If the parameter is too high or too low, it will cause incalculable losses on the site. It is required to achieve the accuracy and standardization of alarm parameters through strict data analysis when setting alarm parameters.

ICS Triplex T8461,ICS Triplex T8311,ICS Triplex T8431,ICS Trusted Triplex T8310
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