SCADA stands for Supervisory Control and Data Acquisition. As the name suggests, the main functions of the SCADA system are data collection and monitoring.
A typical SCADA system consists of a host computer, slave computers, and a communication network. With the continuous expansion of enterprise business operations and the development of internet technology, third-generation SCADA, or networked large-scale SCADA systems, are structurally more open, have better compatibility, and can be seamlessly integrated into the overall plant automation system. Consequently, large-scale SCADA systems have higher requirements for design, stability, and openness, ranging from hundreds to tens of thousands of points. User demands for SCADA systems are becoming increasingly diverse, thus placing higher demands on system architecture.
For modern industrial enterprises, enabling decision-makers to view production process data at any time in order to make more responsive business decisions is the key to enterprise informatization. Among the various resources valued by the enterprise MES system, production process information remains an important resource. If the problem of real-time and effective uploading of production process information cannot be solved, the investment in MES system and ERP management system will still not be fully utilized and guaranteed.
In the process industries, the integration and storage of large amounts of real-time measurement data for production processes and scheduling optimization is challenging. Distributed control systems (DCS) and relational database technologies struggle to meet the speed and capacity requirements, and they also lack platformization and standardization, resulting in inconsistent interfaces, complex access, and unsuitability for large-scale integration. Therefore, SCADA systems designed with distributed real-time databases are closely integrated with real-time database systems.
Real-time database systems can provide high-speed, timely real-time data services, effectively integrate heterogeneous control systems, provide distributed data services, and combine enterprise-wide production process control and business management.
An enterprise's integrated management system, production command, and monitoring and scheduling system inevitably includes a SCADA system group and a real-time database system. Building these systems involves data collection servers, system servers, real-time historical database servers, relational transaction data servers, alarm servers, etc. Therefore, software vendors need to provide integrated platforms and solutions to achieve seamless integration across horizontal and vertical dimensions and across business systems, enabling deep integration of informatization and industrialization, improving enterprise production automation, enhancing economic efficiency, and creating a deeply integrated ecosystem.
SCADA (Supervisory Control and Data Acquisition) systems are powerful computer-based remote monitoring and data collection systems. They comprehensively utilize computer technology, control technology, communication and network technology to achieve real-time data collection from various processes or equipment with dispersed monitoring and control points, enabling local or remote automatic control. This provides comprehensive real-time monitoring of the production process and offers necessary and complete data and methods for safe production, scheduling, management, optimization, and fault diagnosis. SCADA systems are typical distributed computer application systems. In such systems, a superior architecture means greater efficiency and stability, flexible adaptability to industry applications, and the ability to adapt to multiple business scenarios to meet changing user requirements.
The SCADA system is a typical PCS process control and feedback system at Level 2. It complements the MES system at Level 3. In typical application scenarios, the SCADA system is responsible for real-time communication with equipment, real-time recording and alarms. After processing, key information is transmitted to the MES system for archiving and transaction logic processing. We can define certain events in the SCADA system that can trigger process transactions in the MES system. At the same time, process control logic, operation parameters, recipes and other information in the MES system can also be executed by the SCADA system.
We can understand it this way: "Industry 4.0" would be meaningless without the MES system, and the MES system software would be unable to achieve intelligent interconnection and intelligent sensing without the SCADA system.
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