PLC technology and its application value in chemical plant

1.1 overview of PLC Technology

PLC (programmable logic controller) technology is an important kind of technology in the current research and practical application of automation technology. This kind of programmable logic controller can show positive value in many aspects. The application of PLC technology is analyzed, which mainly involves three specific application links, namely sampling input, execution and refresh output. Sampling input is mainly to obtain the corresponding data information with the help of the necessary scanning method, so that it can be orderly analyzed and used in the follow-up; the implementation link is mainly to analyze and summarize all the obtained data information, so as to understand its specific needs and status quo, which can help to make more accurate judgments and decisions, and store and refresh at the same time The output is the information output for the corresponding judgment to realize the effective control of the related control objects.

1.2 application value of PLC technology in chemical plant

In chemical production, the automatic control of each chemical plant can also be realized with the help of PLC technology. The application of PLC technology in this aspect can better promote the automatic control of chemical plant to be more reliable and suitable. Its advantages are mainly shown in the following aspects:

First of all, the application of PLC technology in chemical plant automation control can have strong universal characteristics, PLC technology can be applied to almost all chemical plants, and its application value is outstanding;

Secondly, the application of PLC technology in chemical plant automation control can also have more flexibility and convenience, which is more convenient in connection and assembly, and there are no higher requirements for operators, and the operation and maintenance are also relatively simple; finally, the application of PLC technology in chemical plant automation control also shows a strong accuracy, which is not easy The formation of a more obvious hidden trouble.

Application of PLC technology in automatic control of 2 chemical plant

2.1 PLC control system configuration

In the chemical plant automation control, the introduction of PLC technology needs to pay attention to the effective configuration of the relevant control system, so as to promote it to show a stronger matching effect and help to form a more ideal automatic control performance. According to the requirements of chemical plant automation control, the following points should be grasped in the configuration of PLC control system

First of all, the power supply template should be strictly controlled to ensure that it can coordinate the control of power supply and voltage, so as to avoid the possible power failure;

Secondly, the central processing unit is the core of the whole PLC control system, which needs to ensure that it has a stronger function of calculation and control coordination to maintain the operation of PLC;

In addition, the operation of the whole PLC control system also needs to focus on the reasonable setting of input and output interfaces to ensure that the corresponding interface can show a stronger stable operation effect, especially for some real-time changes of information, can achieve the ideal acquisition and output effect; for the PLC control system, the bottom plate and interface template also need to be set reasonably to ensure the whole system The system runs stably and reliably.

2.2 application of PLC technology in switch control

For the development of chemical plant automation control work, the application of PLC technology in the switch control effect is more prominent, which is also the key control task requirements in the current chemical plant operation.

Combined with the application of PLC technology in switch control, it can be obviously better than the traditional control mode, especially for the application of relay equipment in the past, it can be replaced by PLC technology, and it can also shorten the control interval, so as to ensure that the chemical plant automation control is more reliable and efficient.

The application of PLC technology in switching control can also have strong reliability, which is not easy to appear obvious errors and problems. It can be comprehensively discussed according to the information collected from all aspects, and then it can guarantee that the overall switching control is more appropriate and reasonable, and improve the response accuracy on the basis of rapid response.

2.3 fault analysis and treatment

The application of PLC technology in chemical plant automation control also needs to focus on the effective treatment of common fault problems, so as to avoid the relevant fault problems that may have obvious threat to the stable operation of chemical plant. Because the current production and operation environment of many chemical plants is not particularly ideal, and their own operation complexity is also relatively high, so it is bound to lead to more serious system failure problems; in addition, the power system failure problems will also form a serious impact. The maintenance and management personnel of PLC control system not only need to focus on the definition of various common faults, but also need to refine the specific causes, and also need to conduct a comprehensive analysis of the external environmental factors, so as to better optimize the operation effect of PLC technology.


To sum up, the application of PLC technology in chemical plant automation control can show more obvious advantages. In order to better improve the practical application effect of PLC technology, it is necessary to focus on the layout of PLC control system for standardized control, and increase the maintenance and management efforts, so as to ensure more efficient and reliable operation of chemical plant.

Editor in charge: yyx

Leave a Reply

Your email address will not be published. Required fields are marked *