As an example, the application of the MACS system from Hollysys demonstrates a general method for configuring a DCS (Distributed Control System). The MACS system offers users a flexible platform for system configuration and operational control. To create an application system, engineers use the engineering station software to configure modular functional blocks according to specific logic, forming a system that meets particular requirements. Once the configuration is complete, the system generates a database, control programs, historical data, monitoring flowcharts, and various production reports.
The configuration process typically includes the following steps:
(1) Preliminary Preparation Before starting the system configuration, it's essential to define the list of measurement points, the control plan, and the hardware configuration. This includes determining the system size, IO unit setup, point allocation, and designing flowcharts, reports, and historical data retrieval requirements.
(2) Create a Target Project A project name must be set before proceeding with the engineering configuration. Once the project is created, the corresponding data directory is established.
(3) Configure System Equipment Hardware configuration is done using the system configuration software. Each device on the network is represented by a basic graphic. A master database must be created before configuring the system devices.
(4) Database Configuration This step involves defining and editing point information across all system stations. There are two types of points: physical measuring points, which exist in field control and communication stations, and virtual points used in control algorithms and graphics. Physical points include details like type, address, signal processing, and display mode, while virtual points lack physical location but are used for logical operations.
(5) Control Algorithm Configuration After the database is ready, control algorithms can be configured. The MACS system supports five IEC 1131-3 compliant tools: SFC, ST, FBD, LD, and FM, enabling flexible programming for complex control strategies.
(6) Graphic and Report Configuration Graphic configuration involves setting up background maps and dynamic points that reflect real-time or historical data. These dynamic points must be linked to predefined points in the database. By linking graphic files to the system, operators can view and switch between different visualizations.
(7) Compile and Generate Once all configurations are complete, the system libraries are generated. These include real-time data and parameter databases. The server holds all the database information, while the field control stations only store relevant point and plan page data, automatically downloaded during system initialization.
(8) System Download After the system is built, the libraries, graphics, and reports are installed on the server and operator stations via the network. When the field control station starts, it automatically downloads the latest database and plan pages if there is a version mismatch. This ensures consistent operation across the entire system.
This comprehensive process outlines the standard approach to configuring a DCS application system, ensuring efficient and reliable control in industrial environments.
Pad Mounted Transformer,Wind Power Substation,Step-Up Wind Power Sustation,Step Up Transformer
Hangzhou Qiantang River Electric Group Co., Ltd.(QRE) , https://www.qretransformer.com