Main components: • input section → 2. , buttons or switches receive 3. from outside •4. section → devices regulated by 5. • memory 6. → stores data from inputs and 7. •8. → microprocessor that receives, processes inputs, and sends output signals
Advantages: • flexibility → quick modifications and 9. • reliability → operate 10. in harsh conditions • real-time operation → control tasks in 11. • cost-effective → reduce installation time, efficient use of 12.
Applications: • production 13. • traffic lights control • packaging machines • lifts and 14. • automatic gate systems • heating control systems
5.1 Answer the question: what is a PLC and what is it used for?
aperta
Soluzione suggerita:It is a digital computer used for industrial automation which works as an autonomous system that can automate a specific process, machine function, or even an entire production line.
5.2 Answer the question: what does the input section consist of?aperta
Soluzione suggerita:It consists of sensors, buttons, or switches connected to the PLC that provide signals from the external world.
5.3 Answer the questions: what is the function of the memory unit?aperta
Soluzione suggerita:It stores data from both the inputs and the programs that will be executed by the processor.
5.4 Answer the question: what is the function of the microprocessor in the CPU?aperta
Soluzione suggerita:It receives inputs, processes them according to the programs stored in the memory, and sends output signals.
5.5 Answer the question: why is flexibility one of the advantages of PLCs?aperta
Soluzione suggerita:Because they allow quick modifications and updates without the need for extensive rewiring or hardware changes, in fact they can easily be programmed and reprogrammed.
5.6 Answer the question: in what kind of applications are real-time operations important?aperta
Soluzione suggerita:In applications that require immediate actions, like safety systems or high-speed processes.
5.7 Answer the question: why do PLCs reduce costs?aperta
Soluzione suggerita:Because they eliminate the need for expensive wiring, reduce installation time, and enable efficient use of resources.
5.8 Answer the question: in what fields are PLCs used?aperta
Soluzione suggerita:In production plants, traffic lights control, packaging machines, lifts and escalators, automatic gate systems, and heating control systems.
6. Watch the video about PLCs and complete the sentences with the missing word.
1. A PLC is a special computer that is programmed to control certain in industries. 2. If we want a motor to turn on and off when a is pressed, we must write a program for this operation then download it to the CPU. 3. After writing the program, we must connect the to the input and the motor to the output. 4. When we press the button, an electrical will be sent to the PLC and the PLC input will deliver this signal to the CPU. 5. The CPU will process the received and send the result to the output. 6. The output will turn the data into a raw signal again and apply that to the motor to turn it on.