Lesson 6 Understanding Programmable Logic Controllers (PLCs)

What does PLC stand for?

• Programmable Logic Controller

• Programmable Logical Circuit

• Permanent Logic Circuit

• Programmable Logic Circuit

What are the two main components of engineering systems mentioned?

• Switches and LEDs

• Variables and Constants

• Batteries and Circuits

• Inputs and Outputs

What does the truth table represent in logic circuits?

• The relationship between inputs and outputs

• The type of switches used

• The color of the LED

• The physical layout of the circuit

What logic configuration requires both switches to be closed to illuminate the LED?

• AND logic

• OR logic

In the 'OR' logic configuration, when does the LED turn off?

• When both switches are closed

• When one switch is closed

• When both switches are open

• When one switch is open

Which logic configuration allows the LED to illuminate if at least one switch is closed?

• AND logic

• NAND logic

• OR logic

• XOR logic

What is the main advantage of using PLCs in complex systems?

• They eliminate the need for manual input

• They reduce the need for physical wiring changes

• They increase the system's power consumption

• They simplify the design of the system

How can the logic in a PLC be changed?

• By changing the battery

• By reprogramming through a laptop

• By replacing the LED

• By manually adjusting the switches

Why are PLCs preferred in managing complex systems with numerous inputs and outputs?

• They are easier to install

• They are cheaper than traditional circuits

• They offer a flexible and efficient way to modify system logic

• They consume less power