DESIGN AND IMPLEMENTATION of PLC BASED
6 LADDER DIAGRAM The ladder diagram for the system is shown in figure 5 To turn on the PLC the switch at port I 1 is used and to turn it OFF the switch at port I2 is used When system is started by I 1 than the conveyor belt Q 1 and indicator Q 3 will be datrats as well When I 3 sensed by photo sensor at that time the conveyor belt Q 1