The DCS (Distributed Control System) is primarily focused on industrial automation, while the MIS (Management Information System) is designed for office and business process automation. The key difference between them lies in the speed of data response: DCS systems operate in real-time or within seconds, whereas MIS systems typically handle data updates in hours or even longer. To prevent interference and ensure secure data exchange, an isolation device known as a dynamic data server is essential. This server plays a crucial role in monitoring production processes, storing historical data, performing statistical quality control, enabling predictive maintenance, and diagnosing equipment faults. DCS and PLC systems collect real-time field data and transmit it through a communication network to both the operation station and the dynamic data server. The dynamic data server is capable of capturing and processing large volumes of analog or digital signals from the entire production process, ensuring high-speed data acquisition. Once collected, this data is analyzed and forwarded to the production management department for decision-making and optimization. Many enterprises use multiple DCS and PLC systems from different manufacturers. Integrating these signals into a unified dynamic data server requires a general-purpose display platform that can support various types of DCS and PLC systems. Platforms like FIX, INTOUCH, Kingview, and Synall are commonly used to develop custom drivers for different systems. These platforms allow for seamless integration and visualization of diverse signals. Recently, many factories have adopted universal operation stations running on the NT operating system, with monitoring software such as FIX and INTOUCH. Different DCS models may require specific driver software, but communication between systems can be facilitated through an OPC server. Some signals can also be sent directly to the MIS system. While FIX and INTOUCH can store historical data for up to 280 days for dozens of signals, more extensive historical storage can be achieved using an OSI history database, which supports data retention for over three years. These monitoring tools often come with built-in OSI interfaces. Older DCS systems, however, were often proprietary, with dedicated operating systems and monitoring software, making integration with other systems challenging. To enable interconnectivity, a dynamic data server can be established via a computer interface unit. This allows general-purpose monitoring software to run on the NT platform, though it typically only supports upward data flow—meaning data can go from the DCS to the server, but not vice versa. When designing an MIS system, it is best practice to implement a dynamic data server rather than sending DCS and PLC data directly to web-based systems, as this could potentially disrupt the normal operation of the DCS and PLC. The number of dynamic data servers required depends on the volume of data and the level of data security needed. In most cases, a single server can handle up to 10,000 data points efficiently.
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