PLC Conveyor Motor Ladder Logic

PLC Programming Tutorials for PLC Conveyor Motor Ladder Logic or Conveyor Belt Control using a programmable logic controller (PLC).

PLC Conveyor Motor Ladder Logic

PLC Program for Conveyor Motor

Objective: The sequential tasks as follows

  1. When START button pressed
  2. Motor will be started
  3. RUN (Green Lamp) indication lamp will be activated
  4. Motor Running, so Box will start Move
  5. Proximity Sensor will detect when the box arrives at other end
  6. Motor will be stopped
  7. RUN (Green Lamp) indication lamp will be de-activated
  8. STOP (Red Lamp) indication lamp will be activated
  9. An Emergency Stop push button will be used to stop the motor at any time.

Relay Schematic

Conveyor Relay Logic
  • 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

Conveyor Belt Control using PLC

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3 thoughts on “PLC Conveyor Motor Ladder Logic”

  1. Start-stop motor control relay logic circuit.
    By pressing start button coil relay for magnetic contactor (CR1) and green lamp energized (G). By pressing stop, it will de-energized the coil relay for magnetic contactor (CR1) and the red lamp will ON (R).
    Please convert Relay Logic Circuit into PLC Logic Circuit through complete connection and details below by using the given inputs/outputs based on the given relay logic diagram.
    (INPUT) Stop – I:0.0 , Start – I:0.1
    (OUTPUT) CR1 – O:0.0 , G – O:-0.1 , R – O:0.2

  2. Good Morning editorial team please kindly permit me the use of the PLC conveyor Motor ladder logic and Relay schematic in a Journal Article am working on with my HE student and Co-lecturer .

    Hope to hear from you

    Kind Regards


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