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

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Presentation on theme: "Control of Motion On/Off Control (bang-bang) Proportional Control –open loop –closed loop."— Presentation transcript:

1 Control of Motion On/Off Control (bang-bang) Proportional Control –open loop –closed 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 Control Input and Output Ladder diagrams Timing diagrams State machines

5 Electric Logic Elements wired in series = AND wired in parallel = OR Relay = NOT

6 Boolean Arithmetic

7 Relays

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

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

10 Example – Light Switch

11 Example – Light Relay

12 Example – Light Relay, “And” Logic

13 Example – Light Relay – “OR” Logic

14 Timing Diagrams

15 State Machines

16 State Diagram

17 Logic Equation and Ladder Diagram

18 Example – Latching Relay Logic


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