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On Process Logic Control
On Process Logic Control
On Process Logic Control
On Process Logic Control
On Process Logic Control
On Process Logic Control
On Process Logic Control
On Process Logic Control
On Process Logic Control
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On Process Logic Control

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A very brief dispaly on process control concept and framework, with an example project by DCS (Eurotherm) and SCADA (Iconics Genesis32)

A very brief dispaly on process control concept and framework, with an example project by DCS (Eurotherm) and SCADA (Iconics Genesis32)

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  • 1. On Process Logic Control Experience and Comprehension By Tian LIN
  • 2. Process Logic Control
    • To improve the yields, quality and safety of the production
    • By monitoring the physical and/or chemical processes with instruments
    • Employing proper control and algorithms
    • Aiming at automatic and efficient operations
  • 3. Process Logic Control --- and touched areas
    • Control engineering
    • Measurement technology
    • Process Systems Engineering
    • --- Soft sensing & Inferential control
    • Iterative Learning Control (ILC)
    • --- For robots and batch processes
    • Engineering projects
    • --- Vacuum arc furnace
    • --- Benzene distillation columns
    • --- Magnesia refractory materials tunnel furnace
  • 4. The Process Mechanics --- The key of process logic control
    • To clarify by exploring the process mechanics:
    • Control target
    • Controlled variables
    • Measured variables
    • Manipulated variables
    • System characteristics: (capacity) delays, restraints
    • System models
  • 5. Decompose Process Logic Control Initialisation Phase Termination Phase 1st Phase n th Phase …… Production Process Logic Signals Logic Controller 1st Phase Controller n th Phase Controller …… Initialisation Controller Termination Controller Controller Executors Instruments Soft Sensor Analysers Products Process Mechanics / Models Reference signals Control Outputs Measurements Estimated Quality Quality Results Learning Laws Learning Laws
  • 6. Example: Tunnel Furnace --- Magnesia refractory materials
  • 7. Example: Tunnel Furnace --- Magnesia refractory materials Control System HMI Production MIS Printer LAN ALIN DCS DCS Recorder & Temperature Controller Simulation Screen Signals from/to Tunnel Furnace Microcontroller
  • 8. Control Strategies
    • Logic control
    • Event: Gate open:
    • --- Hold control outputs
    • --- Record cart data
    • Measurements
    • --- Disturbances
    • Alarms
    • Upper/lower limits
    • MIS
    • --- Communication
    • --- Original data
    • --- Periodic statistics
    • Process control
    • --- Influence between zones
    • --- Temperatures
    • --- Air flows
    • --- Pressures
    • --- Fuel flow
    • --- Oxygen
    • Control method
    • --- PID
    • --- Cascade
    • --- Feedforward
  • 9.
    • Thank you!

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