Basic PLC Ladder Programming Examples 10

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 Example: 

Automatically infusing the container with liquids A and B in order when START is pressed. When it reaches the set level, mix the two liquids evenly then open the valve to let out the
mixture.

PLC based Batch Process Ladder Program Example
PLC based Batch Process Ladder Program Example

 

Topics Covered in this example is PLC based Batch Process.
Number of PLC Inputs Required
X1 – Start Switch.
X1 – Low level float sensor. X1 = ON when the liquid level reaches X1.
X2 – High level float sensor. X2 = ON when the liquid level reaches X2.
X3 – Stop Switch.
X10 – EMERGENCY STOP button. X10 = ON when the button is pressed.
Number of PLC Outputs Required
Y0 – Liquid A Inlet
Y1 – Liquid B Inlet
Y2 – Mixture Outlet
Y3 – Agitator /Stirrer
Number of PLC Timer Required
T0 – 60 second Timer, 100 ms Time Base. (See K60 Preset Value for Timer)
T1 – 120 second Timer, 100 ms Time Base. (See K1200 Preset Val. for Timer)

PLC Ladder Programming:

PLC based Batch Process Ladder Program Example
PLC based Batch Process Ladder Program Example

 

PLC Ladder Program Example Description:

·       X0 = ON when START is pressed. Y0 will be ON and latched, and the valve will be opened for infusing liquid A until the level reaches the low-level
float sensor. 
·       X1 = ON when the level reaches the low-level float sensor. Y1 will be ON and latched, and the valve will be opened for infusing liquid B until the level
reaches the high-level float sensor.  
·       X2 = ON when the level reaches the high-level float sensor. Y3 will be ON and activates the agitator. Also, timer T0 will start to count for 60 sec.
After 60 sec, T0 will be ON, and the agitator motor Y3 will stop working. Y2 will be ON and latched, and the mixture will drain out of the container. 
·       When Y2 = ON, timer T1 will start to count for 120 sec. After 120 sec, T1 will be ON and Y2 will be OFF. The draining process will be stopped. 
·       When an error occurs, press EMERGENCY STOP button X10. The NC contact X10 will be ON to disable all the outputs. The system will then stop running.

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2 thoughts on “Basic PLC Ladder Programming Examples 10”

  1. Dear Sir,
    Greetings. I hope you are doing well in this day.
    Thank you very much for the : “Ladder program plc examples”, there is too much insights, and I would like to be in contact with if you can provide me with your email address and the whatsapp number.

    Reply
  2. Once more again, I would like to thank you for the “Traffic lights ladder diagram plc” which I really wanted to get the insight.
    These examples are very helpful.
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