of Control Motion On/Off Control (bang-bang) Proportional Control
-- closed loop -- open loop
Boolean Arithmetic
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.
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
Pneumatic Schematics
Pneumatic Schematics
Electric Logic Control Input and Output Ladder diagrams Timing diagrams State machines
I/O Activity Active Levels High - active level is logic 1 (+V) Active Low - active level is logic 0 (GND)
Ladder Diagrams
Example - Relay Logic
Example - Relay Logic
Example - Relay Logic
Example - Relay Logic
Timing Diagrams
State Machines
State Diagram
Logic Equation and Ladder Diagram
Example - Relay Logic
Another Example
/iSENSORiRET
S0
oCYL=0
iSENSOR oCYL=0
S2
...