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

Question 5

Figure 38-10
In the accompanying diagram, what does MOV stand for? How does it help?

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

Question 9

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

Question 10

A programmable logic controller (PLC) is a computer.

Question 11

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

Question 12

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

Question 13

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

Question 14

Figure 38-10
In a central processing unit (CPU), what does a physical switch or a software switch prevent?