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PLC-Based Conveyor Motor Ladder Logic.
conveyor belt plc programming examples.
Conditions:
When we press the X0 push button the indicator led will be activated and the motor is running, so the box will start and move the conveyor belt. The proximity sensor will detect when the box arrives at the other end then the motor will be stopped. the run indicator lamp will be Off. And the stop indication lamp will be On. An emergency stop push button will be used to stop the motor at any time.
PLC Ladder Logic:
Network1:
In the first network, we are creating a dol stator. A dol stator means that once the start button is pressed, the load will be latched. A latch means that it is turned on by a pulse. So our load also stays on. We used a memory bit (M0) for convenience. When we press the (X0) button our memory bit will turn on and it will be in latch form. and using the (X1) emergency stop button. If there is a problem with the program for any reason, pressing the emergency stop button will reset or shut down the entire system.
Network2:
In this network, we connect to the previous network through memory bit(M0) contacts. And as per the name of the Proximity sensor(X2) we have connected a normally closed (NC) contact and at the output we are connecting two loads, one motor(Y0) and another green light(Y2). As soon as the start button(X0) is pressed, the motor(Y0) and the green light(Y2) will turn on and our conveyor belt will continue to run. When the Proximity sensor( X2) detects an object in front of the sensor, the normally open contact will turn on, turning off the motor(Y0) and the green light(Y2).
Network 2:
In the last network, I connected an ordinarily open(X2) contact as per the name of the sensor and used the red light(Y1) as load, and took (Y3) sensor load to see if the sensor is turning on and off. Normally the sensor is off. When an object is detected in front of the sensor(X2), the sensor will immediately go high and the output's red light(Y1) will turn on. At the same time, the motor(Y0) of the previous network and the green light(Y2) will turn off. If any problem occurs during this sequence, pressing the emergency stop button will stop the entire system.
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