Basic PLC Ladder Programming Examples 7

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 Practice Problem: 

Enabling the indicator to be ON after a 3 sec delay when switch pressed and OFF immediately by the switch 

PLC Ladder Programming Training Examples
PLC Ladder Programming Training Examples
 Topics Covered in this example is PLC Timer (ON Delay).

Number of PLC Inputs Required

X1 – Start Switch.

Number of PLC Outputs Required

Y1 – Output Indicator

Number of PLC Timer Required

T0 – 3 second Timer, 100 ms Time Base. (See K30 Preset Value for Timer)

PLC Ladder Programming:



PLC Ladder Program Description:


·       When X1 = ON, TMR instruction will be executed. Timer T1 will be ON and start counting for 3 sec. When T1 reaches its set value, the NO (Normally Open)
contact T1 will be activated and indicator YI will be ON. 
·       When X1 = OFF, TMR instruction will not be executed. Timer T1 will be OFF and so will NO contact T1. Therefore, the indicator Y1 will be OFF. 
 See More PLC Ladder Programming Examples

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

Youtube Link

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