Start/Stop PB latched with memory B3:0/0.
B3:0/0 enabled to turn ON conveyor motor (O:0/0 ). B3:0/1 is connected in series with normally closed contact to break the line when counter accumulator value reached 3.
B3:0/0 and proximity sensor (I:0/2) are connected in series to input the counter presented at 3 with one shot coil.
B3:0/0 and comparator block is used to enable B3:0/1 to turn OFF conveyor motor. It is also latched to avoid to restrict the motor to turn ON again. Restart button is pressed to start the process from the beginning.
Two ways are used to reset the counter, using manual reset switch and B3:0/1 when the counter accumulator reached preset value.
We can use this example to understand the programming logic in Allen Bradley Programmable Logic Controllers (PLC).
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I would like to learn about PLC any advise