Measure temperature of the given liquid using RTD or Thermocouple and PLC

Aim:

Measure temperature of the given liquid using RTD or Thermocouple and PLC.

Apparatus Required:

PLC software, NO and NC switches.

Procedure:-

1. Load the RS Logix software to the PC.
2. Open the RS Logix software.
3. Switch On the PLC trainer.
4. Open the New project and draw the ladder logic program.
5. Compile the program.
6. Run the Program.
7. Give force and observe the output.

Concept structure:

Problem statement :

1. Temperature controller will start when START switch is closed.
2. Temperature shall be maintained between 60⁰C to 70⁰C.
3. When the temperature is less than 60⁰C the heater is turned ON and cooler is OFF.
4. When the temperature is greater than 70⁰C the heater is turned OFF and cooler is ON.
5. Temperature range is 0⁰C to 100⁰C.

Ladder diagram:

Explanation:

Observations:

Conclusion:

1. When the measured temperature is less than lower cut off temperature------------------------------then (heater/cooler) is ON.
2. When the measured temperature is greater than higher cut off temperature ------------------------------then (heater/cooler) is ON.

Questions:

1. State need of temperature controller in various industries?
2. List advantages of temperature controller using PLC.
3. List comparing instruction of PLC.
4. List out types of continuous and discontinuous controller.
5. List out various type of temperature transducer used for measurement of temperature.