Control system

It’s convenient to ask Baidu directly about such conceptual questions

You can solve this by searching on the forum for information regarding their removal

Things that can be found directly on Baidu of this kind, which are of a comprehensive nature, have little significance

DCS distributed control system, PLC programmable controller, SIS safety interlock system, UPS uninterruptible power supply, ESD emergency shutdown system

DCS is the abbreviation for Distributed Control System; in China’s automation industry, it is also referred to as a distributed control system. It is a new type of computer control system as opposed to centralized control systems, and it has developed and evolved from centralized control systems. It is a multi-level computer system composed of a process control level and a process monitoring level, connected by a communication network. It integrates the 4C technologies of computing, communication, display, and control. Its basic principles are decentralized control, centralized operation, hierarchical management, flexible configuration, and easy setup. A PLC control system, or Programmable Logic Controller, is an electronic device designed for industrial production that performs digital calculations. It uses a type of programmable memory to store programs internally, enabling it to carry out logical operations, sequential control, timing, counting, and arithmetic operations as per the instructions given by the user. It controls various types of machinery or production processes through digital or analog input/output signals. The SIS system (Safety Instrumented System) falls within the category of automation for industrial production processes; it is a system designed to ensure safe operations. Its safety level is higher than that of DCS-based automation control systems. When abnormalities occur in the automated production system, the SIS intervenes to reduce the likelihood of accidents. The SIS system is based on a distributed control system and utilizes advanced, appropriate, and effective specialized computing methods to enhance the reliability of unit operation. ESD is the abbreviation for Emergency Shutdown Device, which refers to the emergency shutdown system. The ESD emergency shutdown system, in accordance with the principles of safety and independence, operates independently of the DCS distributed control system, and its safety level is higher than that of the DCS. Under normal conditions, the ESD system remains in a static state and requires no human intervention. UPS (Uninterruptible Power System/Uninterruptible Power Supply), also known as an uninterruptible power supply, is a system device that connects batteries (usually maintenance-free lead-acid batteries) to the main unit, and uses modules such as inverters in the main unit to convert direct current into mains electricity. It is primarily used to provide a stable and uninterrupted power supply to individual computers, computer network systems, or other electrical electronic devices such as solenoid valves and pressure transmitters. When the mains power supply is normal, the UPS stabilizes the voltage of the mains power and supplies it to the load; at this time, the UPS functions as an AC voltage stabilizer. It also charges the battery built into the device ； When the mains power is interrupted (due to a power failure), the UPS immediately converts the direct current from the batteries into 220V alternating current using an inverter, thereby continuing to supply power to the loads and ensuring their normal operation, while also protecting the hardware and software of those loads from damage. All of these systems are necessary; of course, in addition to these we also have APC systems/OM systems, and so on