1) The security of DCS distributed control system. The unsafe factors of DCS system are determined by its own characteristics. When it comes to safety, we can discuss it from three perspectives: human, equipment, and environment. Firstly, from a human perspective, operators are required to be proficient in equipment systems and basic principles, familiar with operation and accident handling, familiar with the regulations and systems of their position; able to operate and handle accidents correctly, timely detect and troubleshoot faults, and master general maintenance skills. We need to strengthen the technical training of operators, ensure safe operation and operation, and avoid causing human safety hazards due to carelessness. Speaking of equipment, the DCS system consists of software and hardware systems, including an upper computer and a lower computer. The upper computer is mainly controlled by a workstation and requires backup equipment. Daily maintenance of the industrial control computer should be strengthened. Lower level computer and other accessory devices, such as DCS power supply, DCS network, etc. Module failure aging or poor anti-interference ability can cause auxiliary equipment tripping and protection misoperation. The communication between the lower computer and the upper computer is the main hidden danger that causes the safe operation of the production process. Construction technology and quality are also factors. In terms of equipment, we need to strictly control every aspect from installation process and quality to debugging, and finally to normal operation of equipment, equipment inspection, and equipment maintenance. Finally, there is the factor of environment. For large enterprises, their working conditions and environments are different, so the degree of environment also varies. Environmental temperature, humidity, dust, and acidity/alkalinity can also cause significant harm to equipment and personnel. With the improvement of industrial automation, the safe and continuous operation of DCS systems has become the main factor for the safe and economic operation of enterprise production processes.
2) The reliability of DCS distributed control system. At present, in addition to considering the security of DCS systems, we also need to consider how to improve their reliability. The so-called reliability refers to the ability to complete specified functions under certain time and conditions. Not only reflected in a local component, but also in the overall system, affecting the quality of the entire construction. Therefore, to improve the reliability of DCS systems, it is necessary to approach it from two different perspectives: local and global. On a local level, it involves the process standards and quality of each installation component. From a global perspective, we require high compatibility and reliability of the system. We will operate from the following aspects:
① The selection of DCS control system should be of high quality and low cost;
② Choose a construction unit with good qualifications for installation to ensure construction technology and installation quality;
③ During software program design and acceptance debugging, operators should have a thorough understanding and mastery of the system;
④ After the selection is confirmed, it is necessary to fully mobilize the enthusiasm of the staff and do a good job in technical training.
To achieve the above aspects, be proactive and prevent in advance.
The DCS distributed control system has developed to the present day, and can be said to have a hundred flowers blooming, playing a huge role in various industrial fields such as metallurgy, petrochemicals, and thermal power. At present, FCS (Field Control System) has emerged, but DCS is still mainstream. With the development of computer technology, communication technology, and fieldbus technology, it will have a huge impact on DCS systems. DCS systems will gradually develop towards a more intelligent direction. With the increasing improvement of various professional technologies, the degree of industrial automation will also be greatly enhanced. It brings profits to enterprises while further improving their market competitiveness.
