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Control of Motion

Control of Motion. On/Off Control (bang-bang) Proportional Control closed loop open loop. Digital Logic Expressions. Pickup when part is ready, and cylinder is retracted, and emergency stop is not on, or while cylinder is not fully extended and emergency stop is not on.

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Control of Motion

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  1. Control of Motion • On/Off Control (bang-bang) • Proportional Control • closed loop • open loop

  2. Digital Logic Expressions • Pickup when part is ready, and cylinder is retracted, and emergency stop is not on, or while cylinder is not fully extended and emergency stop is not on. oPICK = (iPARTRDY • iCYLRETRACT + oPICK • /iCYLEXTEND) • /iESTOP

  3. Pneumatic Logic Elements • Directional control valve • Shuttle valve - OR function • Twin pressure valve - AND function • Other functions • Check valve • Speed control valve • Time delay valve

  4. Electric Logic Elements • wired in series = AND • wired in parallel = OR • Relay = NOT

  5. Boolean Arithmetic

  6. Relays

  7. Ladder Diagrams Coil N.O. Contact N.C. Contact

  8. Example – Light Switch

  9. Example – Light Relay

  10. Example – Light Relay, “And” Logic

  11. Example – Light Relay – “OR” Logic

  12. Timing Diagrams

  13. State Machines

  14. State Diagram

  15. Logic Equation and Ladder Diagram

  16. Example – Latching Relay Logic

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