On Process Logic Control   Experience and Comprehension By Tian LIN
Process Logic Control <ul><li>To improve the yields,  quality  and safety of the production </li></ul><ul><li>By  monitori...
Process Logic Control --- and touched areas <ul><li>Control engineering </li></ul><ul><li>Measurement technology </li></ul...
The Process Mechanics --- The key of process logic control <ul><li>To clarify by exploring the process mechanics: </li></u...
Decompose Process Logic Control Initialisation Phase Termination Phase 1st Phase n th Phase …… Production Process Logic Si...
Example: Tunnel  Furnace ---  Magnesia   refractory materials
Example: Tunnel  Furnace ---  Magnesia   refractory materials   Control System HMI Production MIS Printer LAN ALIN DCS DCS...
Control Strategies <ul><li>Logic control </li></ul><ul><li>Event: Gate open: </li></ul><ul><li>--- Hold control outputs </...
<ul><li>Thank you! </li></ul>
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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)

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On Process Logic Control

  1. 1. On Process Logic Control Experience and Comprehension By Tian LIN
  2. 2. Process Logic Control <ul><li>To improve the yields, quality and safety of the production </li></ul><ul><li>By monitoring the physical and/or chemical processes with instruments </li></ul><ul><li>Employing proper control and algorithms </li></ul><ul><li>Aiming at automatic and efficient operations </li></ul>
  3. 3. Process Logic Control --- and touched areas <ul><li>Control engineering </li></ul><ul><li>Measurement technology </li></ul><ul><li>Process Systems Engineering </li></ul><ul><li>--- Soft sensing & Inferential control </li></ul><ul><li>Iterative Learning Control (ILC) </li></ul><ul><li>--- For robots and batch processes </li></ul><ul><li>Engineering projects </li></ul><ul><li>--- Vacuum arc furnace </li></ul><ul><li>--- Benzene distillation columns </li></ul><ul><li>--- Magnesia refractory materials tunnel furnace </li></ul>
  4. 4. The Process Mechanics --- The key of process logic control <ul><li>To clarify by exploring the process mechanics: </li></ul><ul><li>Control target </li></ul><ul><li>Controlled variables </li></ul><ul><li>Measured variables </li></ul><ul><li>Manipulated variables </li></ul><ul><li>System characteristics: (capacity) delays, restraints </li></ul><ul><li>System models </li></ul>
  5. 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. 6. Example: Tunnel Furnace --- Magnesia refractory materials
  7. 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. 8. Control Strategies <ul><li>Logic control </li></ul><ul><li>Event: Gate open: </li></ul><ul><li>--- Hold control outputs </li></ul><ul><li>--- Record cart data </li></ul><ul><li>Measurements </li></ul><ul><li>--- Disturbances </li></ul><ul><li>Alarms </li></ul><ul><li>Upper/lower limits </li></ul><ul><li>MIS </li></ul><ul><li>--- Communication </li></ul><ul><li>--- Original data </li></ul><ul><li>--- Periodic statistics </li></ul><ul><li>Process control </li></ul><ul><li>--- Influence between zones </li></ul><ul><li>--- Temperatures </li></ul><ul><li>--- Air flows </li></ul><ul><li>--- Pressures </li></ul><ul><li>--- Fuel flow </li></ul><ul><li>--- Oxygen </li></ul><ul><li>Control method </li></ul><ul><li>--- PID </li></ul><ul><li>--- Cascade </li></ul><ul><li>--- Feedforward </li></ul>
  9. 9. <ul><li>Thank you! </li></ul>

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