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Related Experiment Videos

A VxD-based automatic blending system using multithreaded programming.

L Wang1, X Jiang, Y Chen

  • 1Dept. of Electrical and Computer Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260. lfwang@ieee.org

ISA Transactions
|March 6, 2004
PubMed
Summary
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This study presents an object-oriented software design for automatic blending systems in chemical plants, integrating programmable logic controllers (PLCs) and industrial control PCs (ICPCs). The approach enhances system robustness and cost-effectiveness for small- and medium-sized facilities.

Area of Science:

  • Software Engineering
  • Industrial Automation
  • Chemical Engineering

Background:

  • Traditional automatic blending systems often face challenges in robustness and cost-effectiveness, particularly in small- and medium-sized plants.
  • Integrating programmable logic controllers (PLCs) with industrial control PCs (ICPCs) offers potential for enhanced control and flexibility.

Purpose of the Study:

  • To present an object-oriented software design for an automatic blending system tailored for chemical plants.
  • To detail a multithread-based communication approach for system integration.
  • To propose a practical and cost-effective solution for improving the robustness of Windows-based systems.

Main Methods:

  • Development of an automatic blending control system combining PLC and ICPC functionalities.

Related Experiment Videos

  • Implementation of an object-oriented software design.
  • Adoption of a multithread-based communication strategy.
  • Replacement of conventional dynamic link libraries (DLLs) with virtual device drivers (VxDs) for enhanced Windows platform stability.

    • Main Results:

    • A robust and cost-effective automatic blending system architecture was successfully designed and conceptualized.
    • The proposed software design addresses key system requirements and functionalities for chemical plant applications.
    • The use of VxDs instead of DLLs demonstrated an improvement in system robustness on the Windows platform.

    Conclusions:

    • The object-oriented software design, integrating PLCs and ICPCs with a multithreaded communication approach, provides a viable solution for automatic blending systems.
    • The VxD-based approach offers a practical and cost-effective method to enhance the robustness of Windows-based control systems in industrial settings.
    • This design is particularly beneficial for small- and medium-sized chemical plants seeking reliable and efficient blending automation.