Sewage treatment plant entire factory automatic control system

(1) system survey
The Wuxi city reed village sewage treatment plant is the Wuxi city discharge pipe 理处 subordinate's enterprise unit, is the date processing sewage 200,000 tons automations, the information degree very high entire processing sewage treatment plant.
This factory control system stands, long-distance I/O by four Simens S7-300 PLC stands (ET200) and center controls the room constitution, each PLC stands with long-distance I/O stands all is loaded with a Simens the TP system to take the field data demonstration and the operation, the entire factory has the control system (PLC to stand) connects a unified communication network through a ring-like optical fiber industry ethernet, forms a complete entire factory supervisory system network, simultaneously, in order to manage conveniently, established has managed the local area network, and the control system data will send out manages the local area network.
Control system main constituent:
* 1#PLC station: Feed pump room. Primary cognizance feed pump room, 集水�? craft, equipment parameter and so on cut well gathering, control and transmission.
* 2#PLC station: Air blower room. Primary cognizance 1#, 2#, 3#, the 4# biology pond, the air blower room, initially sink the pond, 1# two sinks the pond, 2# two sinks the pond and so on the craft, equipment parameter gathering, the control and the transmission.
* 3#PLC station: Putty processing. Primary cognizance putty processing, old dehydrated engine room, methane cabinet and so on
* 4#PLC station: 5#, 6#, 7#, the 8# biology pond and 3#, 4# two sink the pond data monitor and control;
* Long-distance I/O station: Stand connected through PROFIBUS and 4#PLC, is responsible to dehydrate the engine room craft, equipment parameter gathering, the control and the transmission.
* Center controls the room:
(1) has through the industry ethernet entire factory control system gathering the data dynamic demonstration to control in the center on the room computer, and passable center has controlled the room computer to carry on the adjustment to the entire factory craft parameter and to carry on the operation to the equipment, and may the logarithm according to carry on processing to form each kind of report form, and memory history data.
(2) transmits through the computer the field data to the simulation screen on, vividly demonstrates the entire factory production and the equipment movement situation.
(3) will concern the data to bequeath the administrative unit through the wireless way (environmental protection bureau and so on).
(4) control network computer does is the data server, the control system related data will issue the synthesis building through the optical fiber (office building) the local area network, will enable the authorized user in the office to be allowed to understand the entire factory production and the equipment condition, the privilege user also might carry on the operation in the office to the entire factory equipment.

(2) project characteristic
1. The system scale is big. The system has four to disperse in different position Simens the PLC subsystem, various subsystems are mutually independent, also constitutes an organic network through the industry ethernet.
2. The network system is complex. Both has the siemens the DP network, the MPI network, and has each PLC interstation the optical fiber industry ethernet, but also has the control system to the management system management system standard ethernet.
3. The equipment involves the breadth. Both has the control system, and has the simulation screen, also has the ordinary measuring appliance, also has the massive imports the analysis measuring appliance.
4. Has realized the entire factory control network unification and the control network and the management network organic synthesis.

(3)th, the project completes the situation
The project throws transports in the recent year, the control system movement stable is reliable, each target had achieved the design request, obtained the party of the first part highly the high praise, in the project overseeing project summary, the automatic control system has obtained the high quality project by each specialty most high score.