Practical application of IEC1131-3 standard in DCS - Database & Sql Blog Articles

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The SIMATIC PCS7 dcs from Siemens AG in Germany were developed on the basis of SIMATIC S5 and S7. The Engineering Toolset used in the engineering toolset is based on the IEC1131-3 standard. Moore Process Automatic Solution uses 4-mation configuration software in its quadruple redundant safety plc (QUADLOG) control system. The software conforms to four programming languages ​​in the IEC1131-3 standard: ladder diagrams, sequential function diagrams, function block diagrams and structural texts, and 4-mation software is also used in the company's APACS DCS/PLC hybrid control system. The DeltaV, a control system with fieldbus, introduced by Fisher-Rosemount in 1996, uses the IEC1131-3 standard configuration. The MAX1000+PLUS DCS from L&N has integrated the ISaGRAF software from CJ International of France in its configuration tool MAXVUE and expanded it to provide five programming functions of the IEC1131-3 standard. DigiTool, the Freelance2000 DCS configuration software from Hartmann & Braun, ABB, Switzerland, supports four programming languages ​​in the IEC1131-3 standard: Ladder Diagram, Sequential Function Chart, Function Block Diagram and Instruction List, and it can provide more than 190 field-tested function block subroutines and more than 200 user-configured graphical symbols. The MOX modular open control system (including the CSS sampling monitoring system) of CiT, which is famous for producing Citect industrial control software, adopts the IEC1131-3 standard configuration, and the software used is also ISaGRAF of CJ International of France. software. In order to realize the interoperability of each company's products, the International Fieldbus Foundation has developed dozens of commonly used standard function blocks and their parameters. The Foundation claims that these function blocks follow the functional block diagram of the IEC1131-3 standard.
In the above example, the ISaGRAF software of CJ International of France is mentioned twice. It is one of the three configuration softwares currently conforming to the IEC1131-3 standard (the other two are InControl of Wonderware of the United States and Paradym of Wizdom Controls of the United States). 31). ISaGRAF software is a Windows-style, graphical, graphically friendly platform for configuring, debugging and maintaining your system.
Domestic DCS products are not backward in this respect. The earliest introduction of IEC1131-3 standard is the Intelligent Equipment Institute of the Institute of Automation of the Ministry of Metallurgy, which is adopted in the EIC2000 fieldbus control system produced by the institute. The OnLon software included in the EIC2000-LON subsystem and the Workbench software included in the EIC2000-ST subsystem are supported by ISaGRAF software. Beijing Hollysys also recognized the importance of the IEC1131-3 standard earlier, so they have adopted the standard language of ladder diagram, function block diagram and structure text in HS2000 DCS, and the FOCS band site launched in 1999. In the bus control system and the MACS advanced control system, all five programming languages ​​of the IEC1131-3 standard are adopted. In the XDPS-400 DCS of Shanghai Xinhua Control Engineering Co., Ltd., which has outstanding performance in the power industry, the control configuration software adopts the functional block diagram programming language of IEC1131-3 standard. Zhejiang Weisheng Automation Co., Ltd., which has a large number of applications in the chemical industry, has adopted the control configuration software conforming to the IEC1131-3 standard in its newly introduced FB-3000 DCS supporting fieldbus. In the domestic DCS application has reached 500 sets of Zhejiang Zhehai Naizhong Automation Co., Ltd., its latest system JX-300X also supports the ladder diagram, function block diagram and sequence function diagram of IEC1131-3 standard. In June 2000, Shenzhen Deweisen Company introduced the TCS flexible control system, and its control configuration software TP311 and TP321 adopted the software package of IEC1131-3 standard.
In the engineering practice, the HS2000 DCS used for material composition batching control software configuration, using ladder diagram, function block diagram and structure text and other programming languages, especially the structure text pair X fluorescence analyzer Analysis results In the complex algorithm configuration for material ratio control, it was found to be quite powerful and did not produce any feeling that the IEC1131-3 standard was not suitable for process control.
In summary, the programming language using IEC1131-3 standard is convenient and practical, and the degree of standardization is high. Users can quickly become familiar with the configuration work and apply the original knowledge to the new system. For the manufacturer, Put human and material resources into the hardware, network or other aspects of DCS. From this point of view, DCS control configuration software using IEC1131-3 standard should be one of the development direction of DCS.