1 / 18

Control of Motion

Control of Motion. On/Off Control (bang-bang) Proportional Control closed loop open loop. Digital Logic Expressions. Cut 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.

zarifa
Download Presentation

Control of Motion

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

  2. Digital Logic Expressions • Cut 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.

  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 Control • Input and Output • Ladder diagrams • Timing diagrams • State machines

  5. I/O Activity Levels • Active = TRUE Inactive = FALSE • Active High - active level is +24 volts • Active Low - active level is 0 volts (GND)

  6. Boolean Arithmetic

  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

  17. oCYL=0 /iSENSOR•iRET S0 iSENSOR S2 oCYL=0 S1 iEXT oCYL=1 Another Example

  18. oCYL=0 /iSENSOR•iRET S0 iSENSOR S2 oCYL=0 S1 iEXT oCYL=1 Example #2 State Diagram cS0 = cS2•/iSENSOR•iRET + cS0•/iSENSOR + /cS0•/cS1•/cS2 cS1 = cS0•iSENSOR + cS1•/iEXT cS2 = cS1•iEXT + cS2•/(/iSENSOR•iRET) = cS1•iEXT + cS2•(iSENSOR + /iRET)

More Related