PLC Programming Tutorials for PLC Conveyor Motor Ladder Logic or Conveyor Belt Control using a programmable logic controller (PLC).
PLC Conveyor Motor Ladder Logic
Objective: The sequential tasks as follows
- When START button pressed
- Motor will be started
- RUN (Green Lamp) indication lamp will be activated
- Motor Running, so Box will start Move
- Proximity Sensor will detect when the box arrives at other end
- Motor will be stopped
- RUN (Green Lamp) indication lamp will be de-activated
- STOP (Red Lamp) indication lamp will be activated
- An Emergency Stop push button will be used to stop the motor at any time.
Relay Schematic
- R : STOP Indication lamp,
- G : RUN Indication lamp,
- M : Motor,
- OL : Overload Relay (Motor Protection Relay),
- LS1 : Proximity Switch,
- PB1 : Start push button,
- PB2 : Emergency Stop Pushbutton,
- CR : Contractor Relay
Operational Sequence
- Start button is actuated.
- CR1-1 closes to seal in CR1 or to latch the start command
- CR1-2 opens, switching the red stop pilot light off
- CR1-3 closes, switching the green run pilot light on
- CR1-4 closes to energize the motor starter and motor
- The box/package moves, and proximity switch (LS1) detects the box when it reached and de-energize coil CR1
- CR1-1 opens to open the seal-in contact ( unlatched start command)
- CR1-2 closes, switching the red pilot light on
- CR1-3 opens, switching the green pilot light off
- CR1-4 opens to de-energize the starter coil, stop the motor, and end the sequence
PLC Ladder Logic