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Evolution of PLC Technology Quiz

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Questions and Answers

What problem arises due to frequent changes in the control system of machines?

Frequent changes in the control system of machines result in expensive operations.

Explain the main purpose of designing PLCs.

The main purpose of designing PLCs is to eliminate the large cost involved in replacing the complicated relay based machine control systems.

What led to the introduction of PLCs in the 1960s?

The introduction of PLCs in the 1960s was led by the need to eliminate the large cost involved in replacing complicated relay based machine control systems.

Why does the presence of many relays in a control panel make installation and maintenance difficult?

<p>The presence of many relays in a control panel makes installation and maintenance difficult due to the complex initial wiring and strict maintenance schedules required.</p> Signup and view all the answers