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

2. Boolean Arithmetic

3. Digital Logic Expressions
When part is ready, cylinder is retracted, and emergency stop is not on, then cut while cylinder is not fully extended and emergency stop is not on.

4. 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

5. Pneumatic Schematics

6. Pneumatic Schematics

7. Electric Logic Control
Input and Output
Ladder diagrams
Timing diagrams
State machines

8. I/O Activity Levels
Active High - active level is logic 1 (+V)
Active Low - active level is logic 0 (GND)

9. Ladder Diagrams

10. Example - Relay Logic

11. Example - Relay Logic

12. Example - Relay Logic

13. Example - Relay Logic

14. Timing Diagrams

15. State Machines

16. State Diagram

17. Logic Equation and Ladder Diagram

18. Example - Relay Logic

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

20. Example #2 State Diagram
iSENSOR S0 S1 S2
iEXT
/iSENSOR•iRET
oCYL=1
oCYL=0
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)