Key words: B & R PLC, DCS, water treatment, configuration software, B& R
1, Preamble
Suzhou Chong Bo Industrial Automation Co., Ltd. is a research, development, promotion and application of new technology, to industrial automation and control technology, focusing on research, development, systems integration and product distribution of high-tech enterprises ; Suzhou Chong Bo B & R Industrial Automation Co., Ltd. is the Austrian Industrial Automation Co., Ltd. Chinese partner and system integrator, the company agent in the world famous brand B & R (B& R) industrial automation products and systems, including: DCS, PLC, HMI, servo drives, servo motors, distributed I / O, industrial software. Company to enrich the project organization and management experience, to provide for water, electricity, machinery, metallurgy, environmental protection, chemicals, petroleum industry, automatic control engineering, systems integration, on-site construction of a full range of engineering and technical services.
Second, system block diagram
under development Precision Sheet Co., Ltd. Ningbo Ying s actual situation and the process requirements, the system is popular in today s world, and mature from the workstation computer (IPC) and the site controller (PLC) together to form the distribution control system. The system s hardware and software with open, multi-level nature, the characteristics of modular structure and powerful scalability and fault tolerance. System consists of PC workstations and on-site PLC controller two component, in order to achieve centralized monitoring and management, and decentralized control. Such a centralized control system to overcome the risk of concentration, poor reliability, not easy to extend and control cables and large amount of defects, can provide information, scheduling, management and functions of centralized control with distributed Wei Xian. When the host workstation computer failure, PLC stations can be independent, stable jobs, and fundamentally improving system reliability.
process according to location and installation requirements, electrical system, PC and lower sub-machine two parts, the PC with Advantech s IPC, lower computer system divided into the main control cabinet and control Line and load switchgear cabinet. Control circuit cabinet equipped with a programmable logic controller used to monitor the process, equipment, real-time operation and the state, on the level, pressure, flow, water quality parameters of the acquisition and display and control parameter settings. control cabinet with programmable logic controller circuit, used as points of data collection and through Modbus communication protocol and the main control room of the host computer and the programmable controller communications, the main control room of the host computer PC, through the configuration software (MCGS) on the status of the equipment on-site display, remote control mode in order to achieve human-computer interaction.
3, system
1, workstation computer
& # 8226;; workstation computer use Advantech (IP610P) Industrial computer P42.8/80G/1G/19 "LCD/CP202I.
& # 8226;; operating systems: Chinese MICROSOFT WINDOWS/9X, WINDOWS / NT;
& # 8226;; Control Software: The domestic MCGS Configuration Software (1024 points, development of running WIN98/NT Edition).
& # 8226;; MCGS version control configuration software is used for system monitoring, control and data acquisition of industrial control software. It can run on WinNT platform. MCGS optimized OLE, ODBC and DDE technology, combined with Microsoft technology. It provides object-oriented animated features, image, open DBF database format, and historical data storage, thus improving the traditional MMI functionality.
2, PLC controller
the system controller, the selected site for the Austrian B & R Industrial Automation Co., Ltd. (PCC2005) family of programmable computer controller, PCC2005 controller and PID calculation of powerful computing capabilities, to ensure precise calculation and speed control requirements. B & R (B& R) is headquartered in Austria Saarbourg, specializing in the production and delivery of automation and industrial control equipment, multinational corporations. She was in Europe, the Americas, Africa and Asia more than 50 countries have established cross-border divisions and numerous partners. With years of expertise in automation and experience, and induced into the world of thousands of control systems, B& R beyond its reputation for performance and technology industry.
Fourth, the control object described
1, circulating water treatment system
2, desalination water treatment system
5, control description
control mode into automatic, manual and stop the three types;
manual operation mode, you can spot all the control buttons on the pump every single water treatment system equipment to open, stop and other operations.
automatic operation mode:
circulating water system control functions:
1, control system consists of computer workstations composed of IPC and PLC controllers
2, PLC controller use high-performance B& R s PCC2005 series CP676 as the main CPU, computer workstations and PLC using RS485 mode, an industrial communications networks, data acquisition and exchange, the user can observe the computer workstation on the status of field devices and data, while the master station PLC parameter setting and operation mode selection.
3, PID regulator
A. return water flow regulation function with PID reference volume of circulating water flow rate of water
B. next to the stream flow regulation function with PID reference volume of water flow pump bypass flow
C. inverter A / B can be achieved with PID automatic adjustment of water pressure
4, original pumps: manual switch with thermal overload protection function
5, raw water solenoid valve: the original pump synchronization, so that if one of the original pumps open, raw water solenoid valve opens automatically, as the original water pump all off, the solenoid valve closed.
6, diesel pumps: system failure in the case of loss of power, 6 seconds diesel pump automatically starts (system design).
7, circulation pump C / D: using a soft-start switch, not at the same time start, you must first start and operate normally after a 10S, then start another circulating pump.
8, cooling tower fan: Manual switch with overload and thermal protection function.
9, bypass flow pump: manual switch with overload and thermal protection function.
10, pressure monitoring: in the original pump export / outlet for the water pressure monitoring, and set the alarm limit value;
11, Traffic control: in the original pump export / outlet for water flow monitoring, and set the alarm limit value;
12, all devices have on-site manual and computer work stations moving to open function.
13, all the pumps running, open stop feedback, fault information back to the computer are working.
desalination water treatment system features:
1, control system consists of computer workstations composed of IPC and PLC controllers
2, PLC controller use high-performance B& R s PCC-2005 Series CP476 as the main CPU, computer workstations and PLC using RS485 mode, an industrial communications networks, for data collection and exchange, the user can observe the computer workstation on the status of field devices and data, while the master station PLC parameter setting and operation mode selection.
3, all devices have on-site computer workstation to manually open the remote control function
4, all of the pump has overload protection
5, liquid level / flow / pressure / temperature / conductivity can set the range, and can set the appropriate up / lower limit alarm value
6, concentrated water discharge valve in the system starting conditions, the sewage can be set to work in the regular way, while also choose manual intervention.
7, water flow has accumulated / clear 0 / initial value initially for other functions.
8, high-pressure pump high pressure / low pressure alarm, when the conditions established for 5 seconds, the high-pressure pump / pump off and return to the original manual status, alarm.
9, mixed-bed high-pressure alarm, when the conditions established for 5 seconds, the booster pump to manually shut down and restore the state police.
10, net exports of high-pressure pump (for the limit parameters can be set), 5 seconds, the pure water pump all closed, and alarms.
11, part of the control function: (parameters can be set, = 0, turn off this feature)