PLC LAB 2

Question 1

What are the major Hardware components of a basic automated control system?

Answer 1

1) PLC
2) Input devices
3) Output devices
4) AC circuits

Question 2

What are the major components of a PLC?

Answer 2

Processor
Input modules
Output modules
Power supply

Question 3

What are the AC circuits involved in an automated control system?

Answer 3

CPU power supply
Power supply for input devices and
Power supply for output devices

Question 4

In the compactlogix modular controllers which device is always the first module to the left in the assembly?

Answer 4

The processor

Question 5

Where are the io modules and power supply in a compactlogix modular controller?

Answer 5

To the right of the processor (position #1 to #12)

Question 6

What is the maximum amount of IO modules that can eat in between the processor and the power supply?

Answer 6

3

Question 7

What is the maximum amount of IO modules that can be between the power supply and end cap in a single bank system?

Answer 7

8

Question 8

What is the overall maximum amount of modules that can be installed in a single bank system?

Answer 8

11 (3+8)

Question 9

What is contained in the processor module?

Answer 9

Central processing unit, memory for data tables, user ladder logic programs.

Question 10

What is the function of the processor module?

Answer 10

Data is received by the processor and sent to other PLC components

Question 11

What does the power supply supply power to?

Answer 11

Processor and communication bus

Question 12

What does the power supply not supply power to?

Answer 12

Field devices

Question 13

What does the power supply need to be sized to?

Answer 13

To accommodate the loading of all cards in the assembly.

Question 14

What is the function of an input module?

Answer 14

Provide interface between the field device input signal and the processor.

Question 15

What is the function of output modules?

Answer 15

Provide an interface from the processor to control a discrete output field device

Question 16

What is an analog module?

Answer 16

Module that operates over a continuously changing range.

Question 17

What is the function of an analog module?

Answer 17

Provide an interface between the processor and the analog input and or output field devices

Question 18

What is the function of the leftmost end plate?

Answer 18

How’s the battery for the eeprom in the processor

Question 19

What is the function of the rightmost end plate?

Answer 19

House the terminal assembly required to complete and terminate the backplane

Question 20

What is the device or which ladder logic programs are interred to the processor?

Answer 20

Programming device

Question 21

What is the function of the backplane?

Answer 21

• Provides a common bus that enables all the modules to receive power from the power supply and
• provides communication between modules and the processor

Question 22

What provides housing for the modules?

Answer 22

A chassis or separate enclosure

Question 23

What are the two roles of the power supply?

Answer 23

• Supply DC operating voltage for major plc components

- provide communication bus voltage

Question 24

What is the first line of system reliability and integrity?

Answer 24

The power supply

Question 25

2.3

Answer 25

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