Basic PLC Ladder Programming Examples 2

Basic PLC
Ladder Programming Training Examples for Beginners.

 Hi friends here we are starting here a series of Free Training on PLC Ladder Programming training & tutorials.These PLC Ladder Programs are important to get basics of Ladder programs.

 PLC
Ladder Practice Problem:



Switching
on/off the Lamp whether they are at the bottom or the top of the staircase.

PLC Ladder Programming Practice Problem 2

 

Topics Covered in this example is using Contacts in parallel.

Number
of PLC Inputs Required

X0 – Switch at the bottom of Staircase
i.e. X0 turns ON when the bottom switch is turned to the right.
X1 – Switch at the top of Staircase
i.e. X1 turns ON when the top switch is turned to the right.

Number
of PLC Outputs Required

Y0 – Lamp

PLC
Ladder Programming:

PLC Ladder Programming Practice Problem 2

PLC Ladder Program Description: 


  •       
    If the states of the bottom switch and the top switch are the same, both
    ON or OFF, the light will be ON. If different, one is ON and the other is OFF,
    the light will be OFF
  •        
    When the light is OFF, users can turn on the light by changing the state
    of either top switch at the bottom switch of the stairs. Likewise, when the
    light is ON, users can turn off the light by changing the state of one of the
    two switches.

Note:
Example is only for training purposes. No practical implementation is done.

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