DCS5200 Pulp and Paper Distributed Control System
Product introduction:
Pulp and paper DCS process control system is the key equipment for paper mill automation. It is divided into pulping DCS and paper making DCS according to the situation of paper mills. According to different conditions, pulping DCS can be divided into different pulp DCS, such as dough DCS, base slurry DCS, core slurry DCS, as well as alkali recovery DCS, wastewater DCS, heat pump DCS and so on.
Guangzhou Bo Hao Automation has launched the DCS5200 process control system for the domestic paper industry. The system adopts Siemens fully automated solutions to realize full-line integrated DCS control in the pulp and paper production process. The highly reliable industrial field bus PROFIBUS-DP and industrial Ethernet combined network structure effectively achieves data sharing, and operation stations are mutually effective. Backup. The distributed I/O module not only saves on-site cables, but also improves the signal's anti-interference ability, and completely solves the entire process from pulping, pulping, slurry distribution, flow delivery, wire mesh, drying and coiling. control. In particular, the comprehensive sharing of quantitative moisture, thickness, color, and paper disease data fully realizes the integrated control of the final product quality and the entire process parameters of pulp and papermaking.
System Overview:
Communication system: Industrial Ethernet and PROFIBUS fieldbus are used. Ethernet is used for data communication between system stations. It conforms to ISO/OSI regulations and has open system features. The network equipment adopts the peer-to-peer communication method, and the network equipment can be added or removed online without affecting the normal operation of other equipment. Uses PROFIBUS industrial fieldbus and distributed I/O modules for field control and inspection of the data exchange standard of the acquisition unit Controller: The controller uses Siemens with PROFIBUS-DP and standard industrial Ethernet interface S7400 series controllers, combining Network technology, automation control technology, computer technology. Covers the security of large distribution systems, network expansion capabilities, integrated user interface, and large-capacity information access capabilities. The system can monitor and control process variables throughout the process to meet process control requirements and scheduling strategies. The system not only can complete the conventional single-loop control, but also has special functions such as high-speed digital processing, high-speed sequential event recording (SOE), programmable logic control, etc.; the system scale can be flexibly changed, and the process control from one unit to the whole plant can be realized. Automated integration.
Overview of Hardware Performance The field control station is a large-scale I/O processing system that deals directly with the site. It is a field control device with signal acquisition, loop adjustment, logic chaining, sequence control, and local operation functions. The on-site control station consists of a main control unit, analog and digital I/O modules, communication modules, power supply modules, and cabinets that accommodate multiple types of signals.
Operation station configuration CPU: P4,
Frequency: 2.4GHZ
Hard disk capacity: 80G
Memory: 256M color display: 21 inch flat screen, 1600 × 1200 resolution TCP/IP network communication 52 × CDROM
3.5-inch floppy drive
52-speed optical drive controller The central processing unit of the on-site control station undertakes tasks such as signal processing, control calculations, communication with servers and other units of the station. The high-speed and reliable AS416-2 is configured to exchange data with the switch module upwards via the Ethernet and communicate with the I/O module via the advanced fieldbus ProfiBus-DP. Each AS-400 central processor has enough I/O signal processing capability: up to 3,768 digital input/output channels and 2048 analog input/output channels.
The I/O system I/O system includes the expansion module ET200M, I/O module, active bus template, and an expansion module with 8 I/O modules. The expansion module is mounted on the standard rail. The I/O expansion module is inserted along the slot on the module. The on-site cabinet standard cabinets, for the on-site process conditions of the paper mill paper machine, the on-site remote control station cabinets are imported brand cabinets designed and manufactured by Germany specifically for the harsh environment of the factory, and the IP level is 55. The main control unit, power supply module, and I/O module are all firmly installed. The field instrument signal line enters the cabinet through the channel at the bottom of the cabinet and is directly connected to the terminals of the I/O module.
Software Technology Description:
WINCC has all the functions of advanced man-machine interface products, and its integrated functions include: 1. The graphic system is used to freely configure the picture and operate completely through graphic objects. The graphic object has dynamic attributes and online attributes can be set. state.
2. The alarm information system records and stores events and displays them. Information classification, information display and reports can be freely selected. The operation is very simple. 3. The variable archives receive, record, and compress measurements for curve and chart display and further editing functions.
4. Report system users are free to select a certain report format, and output the user report for information operations and document current data according to the time sequence or event trigger.
5. Data processing The actions of graphic objects are edited using C language and C compiler. Standard interface: Access SYBASE database for configuration and process data via ODBC and SQL. Application Program Interface: Allows the user to write standard applications that can be used to extend the basic functions of WinCC.
System features:
1) Based on the idea of ​​fully integrated automation;
2) High-speed, reliable and open PROFIBUS network;
Connect the engineering station, operator station, control station and communication processing unit with Ethernet. The network adopts a bus topology and follows the open field bus standard.
3) Decentralized, independent and powerful control station;
4) The system configuration is flexible; all the modules of the control station (such as various types of I/O modules) are configured according to the requirements of 20% redundancy.