BOTTLE FILLING PROCESS
The bottle filling process is an automated one and it is commonly implemented one in all industries. The objective is to fill bottles in a sequence. PLC has been implemented to control this sequence.
The bottle filling process is an automated one and it is commonly implemented one in all industries. The objective is to fill bottles in a sequence. PLC has been implemented to control this sequence.
The process starts when an empty bottle is placed on the rotating conveyor belt, the bottle starts moving as the infeed motor rotates. As soon as the bottle comes in front of the position sensor (limit sensor), a signal goes to PLC to stop the infeed motor to open the solenoid valve. Now the bottle starts to fill. The bottle liquid level is measured by a photosensor. The solenoid valve is closed and the infeed motor is started when photosensor output goes high. The liquid tank level is continuously monitored and the inlet solenoid valve is closed/opened accordingly. The bottle filling process is continuously carried out.
PROCESS DIAGRAM
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| Bottle Filling Process Diagram |
Application of PLC in a Bottle Filling Process
PLC stands for Programmable Logic Controller. A PLC is a special form of microprocessor based controller designed to operate in noisy industrial environment. It has a programmable memory to store control instructions. The term logic is used because the programming is based on logic, switching, sequencing, timing, counting and arithmetic operations. The programming language used in PLCs are simple. Example: Ladder Diagram
LADDER DIAGRAM OF BOTTLE FILLING PROCESS
Inputs and Outputs in a Bottle Filling Process
Inputs
Start Switch - I1.6
Low Limit Level Sensor - I1.7
High Limit Level Sensor - I2.0
Position Sensor - I2.1
Photosensor - I2.2
Photosensor - I2.2
Outputs
Output Feed Motor - Q0.0
Input Feed Motor - Q0.1
Tank Inlet Solenoid Valve - Q0.2
Tank Outlet Solenoid Valve - Q0.3
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LADDER DIAGRAM OF BOTTLE FILLING PROCESS
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Rung 2: When both the level sensors (low limit and high limit) are at off condition, the inlet solenoid valve is opened. The tank is getting filled up with the liquid.
Rung 3: when the high limit level sensor is activated, the inlet solenoid valve is closed and the liquid flow is started.
Rung 4: When the position sensor is activated, the input feed motor is turned off and the outlet solenoid valve is opened.
Rung 5: When the photosensor is activated, the input feed motor is turned on and the outlet solenoid valve is closed.
Rung 6: When the start switch is turned off, all the outputs are turned off.
Also read: Application of PLC in Mixing Process
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