Omron PLC Program Example for Beginners

Write ladder logic for the simple ON/OFF of the conveyor motor and lamps.

1. Switch 1 on —— conveyor motor on
2. Switch 2 and switch3 on ——- lamp 1 on & lamp2 on
3. Switch 4 or switch5 on —– conveyor motor off
4. Switch 6 on —– lamp 1 off, lamp2 off

PLC Program Example Logic

PLC Program Description

When switch 1 is pressed, the motor will turn ON. Switch 4 and 5 are connected as normally closed contact in series with output which will make output go OFF when anyone goes ON.

Switch 2 and 3 are connected as normally open contact in series with output which will make output lamp 1 and 2 go ON only if both are ON.

Switch 6 is connected as normally closed contact to break the power line when it goes ON.

Note: This PLC example is from the Omron PLC course.

Author: Hema