Sewage treatment automation monitoring system communication solution
Overview With the continuous development and improvement of the level of science and technology, the use of computer systems for production management has become more and more in-depth among companies in all walks of life. Therefore, the use of computers as the core to establish an automated control system for the overall management of wastewater treatment plants is not only feasible, but also can improve the overall management level and production efficiency of enterprises, thereby increasing the production efficiency of enterprises. For this reason, Shenzhen News Technology has launched Industrial Ethernet fiber ring network switches to realize the communication needs of the system.
From the perspective of system functions, the computer monitoring system of the WWTP consists of three layers: the management computer subsystem, the monitoring computer subsystem, and the on-site control station. The management computer subsystem and the monitoring computer subsystem belong to the upper level system. They are connected via Ethernet. The monitoring computer subsystems and field control stations exchange data through industrial Ethernet. The on-site control station belongs to the lower-level system.
The monitoring system of the sewage treatment plant project is composed of an upper system composed of a PLC and a computer control management system and an instrument detection system. The management computer subsystem in the upper system consists of a data server, a production management and office computer, a network switch, and a printer. And so on; monitoring computer subsystem consists of two central monitoring computers, projector systems, printers, industrial network switches.
The overall structure of the monitoring system sets up a central control room (middle control room) in the integrated office area of ​​the sewage treatment plant to centrally monitor, control, and manage the entire production process and process of the entire wastewater treatment plant, realizing automatic control and alarm during the production process. The automatic protection, automatic operation, automatic adjustment, and important parameters in each process flow are monitored online in real time, real-time monitoring of the operating conditions of the entire plant process equipment.
The central control room management computer subsystem adopts a computer network in the form of B/S (browser/server) structure, with a data and network server as the core, and forms a 100M switched local area network; the monitoring computer subsystem adopts C/S (client) / Server) architecture to monitor redundant workstation configurations to improve data security.
The central control room monitoring computer subsystem and the individual PLC control systems in the factory are connected by a fiber optic ring network. The network form is Industrial Ethernet and the transmission rate is 100M.
One data server, network printer and office computer are configured in the central control room to form a management computer subsystem. The management computer subsystems are the entire plant's production and operation, management decision-making, production scheduling, daily office building digital information transmission platform, connection monitoring computer subsystem and office management terminal, and providing the entire plant's internal information management structure. The construction of the management network completes the work of the basic hardware platform, basic software, database of the production process automation control subsystem, and access to the automation control subsystem of the production process through WEB. According to the application requirements, the management computer subsystem includes the production and operation assistant decision-making subsystem, the production scheduling management and command subsystem, the equipment management subsystem, and the integrated office management subsystem.
Two monitoring workstations are configured in the central control room and are hot-standby. Under normal conditions, one is used for process monitoring and the other is used as a backup, which can replace faulty equipment at any time. The hardware and software configurations of the 2 operator stations are identical, and the functions and the monitored objects can be interchanged. At the same time, configure 2 printers and projectors to form a complete monitoring computer subsystem.
At the same time, according to the system planning and future needs, when the central control system software and hardware are designed, the interfaces of the 1 to 2 single-unit control systems needed for the long-term projects will be reserved. The central system reserves Ethernet network interfaces for connection with office automation systems, enabling data sharing, production, and management integration within the project.
From the perspective of system functions, the computer monitoring system of the WWTP consists of three layers: the management computer subsystem, the monitoring computer subsystem, and the on-site control station. The management computer subsystem and the monitoring computer subsystem belong to the upper level system. They are connected via Ethernet. The monitoring computer subsystems and field control stations exchange data through industrial Ethernet. The on-site control station belongs to the lower-level system.
The monitoring system of the sewage treatment plant project is composed of an upper system composed of a PLC and a computer control management system and an instrument detection system. The management computer subsystem in the upper system consists of a data server, a production management and office computer, a network switch, and a printer. And so on; monitoring computer subsystem consists of two central monitoring computers, projector systems, printers, industrial network switches.
The overall structure of the monitoring system sets up a central control room (middle control room) in the integrated office area of ​​the sewage treatment plant to centrally monitor, control, and manage the entire production process and process of the entire wastewater treatment plant, realizing automatic control and alarm during the production process. The automatic protection, automatic operation, automatic adjustment, and important parameters in each process flow are monitored online in real time, real-time monitoring of the operating conditions of the entire plant process equipment.
The central control room management computer subsystem adopts a computer network in the form of B/S (browser/server) structure, with a data and network server as the core, and forms a 100M switched local area network; the monitoring computer subsystem adopts C/S (client) / Server) architecture to monitor redundant workstation configurations to improve data security.
The central control room monitoring computer subsystem and the individual PLC control systems in the factory are connected by a fiber optic ring network. The network form is Industrial Ethernet and the transmission rate is 100M.
One data server, network printer and office computer are configured in the central control room to form a management computer subsystem. The management computer subsystems are the entire plant's production and operation, management decision-making, production scheduling, daily office building digital information transmission platform, connection monitoring computer subsystem and office management terminal, and providing the entire plant's internal information management structure. The construction of the management network completes the work of the basic hardware platform, basic software, database of the production process automation control subsystem, and access to the automation control subsystem of the production process through WEB. According to the application requirements, the management computer subsystem includes the production and operation assistant decision-making subsystem, the production scheduling management and command subsystem, the equipment management subsystem, and the integrated office management subsystem.
Two monitoring workstations are configured in the central control room and are hot-standby. Under normal conditions, one is used for process monitoring and the other is used as a backup, which can replace faulty equipment at any time. The hardware and software configurations of the 2 operator stations are identical, and the functions and the monitored objects can be interchanged. At the same time, configure 2 printers and projectors to form a complete monitoring computer subsystem.
At the same time, according to the system planning and future needs, when the central control system software and hardware are designed, the interfaces of the 1 to 2 single-unit control systems needed for the long-term projects will be reserved. The central system reserves Ethernet network interfaces for connection with office automation systems, enabling data sharing, production, and management integration within the project.
Computer monitoring system overall configuration
The overall structure of the automation system
The overall structure of the automation system is shown in the figure below:
Equipment configuration and structure as shown below:
The power distribution system management terminal includes: a plant-wide power distribution system management terminal, and the system 1#PLC or the center monitoring computer collects various real-time information of the internal power transmission and distribution system of the plant through the management terminal.
Field control station includes: Pre-processing control station (1#PLC), Biochemical pool control station (2#PLC), Mud treatment control station (3#PLC)
Among them, the pre-processing control station (1#PLC) and the in-plant power distribution system management terminal perform data communication through the 2# industrial switch. The biochemical pool control station (2#PLC) is connected to the optical fiber industry Ethernet ring network through a 3# industrial network switch. Mud treatment control station (3#PLC, this PLC is supplied by other manufacturers and establishes a set of independent control system) is connected to the optical fiber industry Ethernet ring network through 4# industrial network switch. The central monitoring computer is connected to the optical fiber industry Ethernet ring network through the 1# industrial network switch, and performs data exchange with the field control station.
Among them, the pre-processing control station (1#PLC) and the in-plant power distribution system management terminal perform data communication through the 2# industrial switch. The biochemical pool control station (2#PLC) is connected to the optical fiber industry Ethernet ring network through a 3# industrial network switch. Mud treatment control station (3#PLC, this PLC is supplied by other manufacturers and establishes a set of independent control system) is connected to the optical fiber industry Ethernet ring network through 4# industrial network switch. The central monitoring computer is connected to the optical fiber industry Ethernet ring network through the 1# industrial network switch, and performs data exchange with the field control station.
Monitoring system communication network structure: