With the development of automation technology, the original PLC controller can no longer meet the requirements of some large projects. In this case, the DCS control system came into being. Dcs control system, also known as distributed control system, is a new type of computer control system relative to centralized control system. it is developed and evolved on the basis of centralized control system. In terms of system functions, DCS and centralized control system have little difference, but the realization methods of system functions are completely different.

The so-called DCS, namely distributed control system, is also called distributed control system in China. I won’t say more specifically. Now let’s talk about how novices learn the dcs system, which is a common problem faced by all novices in the dcs industry. Now let me talk about my own views on DCS:

For DCS, we are mainly concerned with the following issues: the communication protocol of each part of the network; Redundancy (server, power supply, master control

Controller, important I/O module); How to configure I/O input and output characteristics. I/O commonly used include analog input AI, analog output AO, switching input DI, and switching output DO. In addition, there are SOE, PI, etc. Among them, AI signals include RTD (thermal resistance signal), TC (thermocouple signal), 4-20MA signal (also can be 0-20MA, 0-5V). After understanding these, the next step is to learn the configuration, practice and modify the control scheme, and install the scheme to the main controller (without affecting the production).

In addition, it is a combination of software and hardware. In the actual face of controlling on-site production, you will soon get started. After that, you can learn DCS

Communication between the system and PLC, MIS, SIS.

Suggestions on theoretical knowledge: automatic control principle (don’t go deep into it, just understand PID, because even a very basic PID may not be able to put into automatic mode on site); Common programming languages (FBD, LD, etc.) are naturally learned in the process of configuration; The analog circuit and digital circuit are preliminary, and this need not be in-depth; Computer knowledge, especially network knowledge, is based on the rapid development of computer software and hardware