193-ECPM3 AB
generation, testing, and operation, which requires corresponding system software support, including operating systems, programming languages, and various tool software. A complete set of DCS application software running on the operation station should be able to achieve the following functions: real-time database, network management, historical database management, graphic management, historical data trend management, detailed display and modification of the database, generation and printing of record reports, human-machine interface control, control loop adjustment, parameter list, serial communication, and various configurations
The development process of DCS mainly involves using system configuration software to generate various application software based on the actual needs of the control system. The configuration software functions include basic configuration configuration and application software configuration.
The basic configuration configuration is to provide the system with configuration information, such as the number of various stations in the system, their index flags, the maximum number of points per control station, the shortest execution cycle, and memory capacity.
The configuration of application software includes relatively rich content, mainly including the following aspects.
(1) Configuration of control circuit
The configuration of control circuits essentially utilizes various basic functional modules provided by the system to form various actual control systems. At present, various DCS provide different configuration methods, which can be summarized as specified calculation module connection methods, judgment table methods
step recording methods, and so on.
The connection mode of specified calculation module is to call various independent standard calculation modules, connect them into various control loops with lines, and finally generate control software automatically. This is a configuration method with intuitive information flow and control functions. The decision table method is a pure form of filling in the tabl
