Basic PLC Ladder Programming Example 13


Basic PLC
Ladder Programming Training Example 13: Product Packaging PLC Ladder Program 

Basic PLC Ladder Programming Training Examples for Beginners. Hi
Friends here we are starting a series of Free Training on PLC Ladder
Programming. These PLC Ladder Programs are important to get basics of Ladder
Programs

PLC Ladder
Practice Problem:


·        
Once the photoelectric sensor detects 10 products, the robotic arm
will begin to pack up. When the action is completed, the robotic arm and the
counter will be reset.

Topics
Covered in this example is using counter
in PLC Program  

Number of
PLC Inputs Required 

X0 – Photoelectric sensor for counting
products. X0 = ON when products are   detected.
X1 – Robotic arm action completed sensor. X1
= ON when packing is completed. 

Number of
PLC Counter Required


C0 – Counter: 16-bit counting up (general
purpose) 
Number of PLC
Outputs Required 

Y0 – Robotic arm for packing

PLC Ladder
Programming: 


PLC Ladder Program


PLC Ladder
Programming Description: 


  • Once the photoelectric sensor detects a product, X0 will go from
    OFF to ON once, and C0 will count for one time.
  •  When the present value in
    C0 reaches 10, the Normally Open contact C0 will be closed. Y0 = ON, and the
    robotic arm will begin to pack.
  • When the packing is
    completed, the robotic arm action completed sensor will be enabled. X1 will go
    from OFF to ON and RST instruction will be executed. Y0 and C0 will be reset
    for the next packing task.  

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