Application:-There is one machine in the factory, we
want to start/stop motor using push button g from the panel. Give motor ON lamp
and motor trip lamp on the panel. When motor is running ON lamp should be ON
and if motor trip due to some problem, trip lamp should be ON. Write the PLC
program in LAD and FBD language.
Solution:-Here
we will make PLC program in the PLC so operator can operate motor from the
panel and get indication on the panel. And also we will take inputs signal and
outputs for our application
Diagram:-
PLC
Program:-Write the PLC program from above application using
LAD diagram language.
PLC
program explanation:-
As per our application we wrote PLC program. In this
program we have considered following inputs and outputs for our application. We
can use any make PLC for our application.
Inputs:-
Start Button:-I0.0
Stop Button:-I0.1
Trip Input:-I0.2
Outputs:-
Motor:-Q0.0
Motor On Lamp: Q0.1
Trip Lamp:-Q0.2
Network
1:-In
this network we are starting and stopping motor by push button. By pressing
Start (I0.0) motor can be started and by pressing stop PB (I0.1), motor (Q0.0)
can be stopped.
Network
2:-In
this network we wrote the logic for motor ON lamp or indication (Q0.1). SO when
motor is running, Motor ON lamp is also ON.
Network
3:-For
safety purpose we have considered here trip lamp (Q0.2). So when trip signal
(I0.2) is ON, trip lamp is also ON.