Deck 38: Programmable Logic Controllers

Question 1

The input I\O uses ____________________ to electrically separate the incoming signal from the central processing unit (CPU).

Answer 1

opto-isolation

Question 2

Programmable logic controllers are designed to be programmed with common computer languages.

Answer 2

False

Question 3

The ____________________ is used to connect the central processing unit to the load.

Answer 3

output module

Question 4

The I\O rack is used to connect the CPU to the outside world.

Question 5

The ____________________ is used to program the central processing unit (CPU).

Question 6

What is the function of the power supply?

Question 7

There is a physical timer or counter in the programmable logic controller (PLC).

Question 8

The microprocessor chip used in most programmable logic controllers (PLCs) is the same as found in most home and business personal computers.

Question 9

The central processing unit of a programmable logic controller is sensitive to what two things?

Question 10

Programmable logic controllers can be divided into four primary parts. What are they?

Question 11

The actual logic of the control circuit is performed by ____________________.

Question 12

A programmable logic controller (PLC) is a computer.

Question 13

Figure 38-10


In the accompanying diagram, what does MOV stand for? How does it help?

Question 14

Output modules provide ____________________ between the central processing unit (CPU) and external circuit.

Question 15

In a central processing unit (CPU), what does a physical switch or a software switch prevent?