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 .
Topics Covered in this example is PLC Timer (ON Delay).
X1 � Start Switch.
Y1 � Output Indicator
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.
Note: Example is only for training purposes. No practical implementation is done.
See More PLC Ladder Programming Examples
See More PLC Ladder Programming Examples
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