Uses converters to make linear DC power because of its smooth voltage

What best describes the basic layout or structure of a PLC system?

The basic PLC setup follows a pattern of input to software to output

Which is true about how binary data is communicated?

The binary system has only two characters available

What is the main difference between CompactLogix and ControlLogix

Compactlogix is for application that are machine-level control applications

Which statement about the I/O section of a PLC is true? The I/O section of a PLC:

Sends the power signals to and from I/O devices

Which statement is true of digital devices?

Any device that has two possible states is considered binary

What was the main reason PLCs were invented?

It is much easier and cheaper to reprogram a PLC than to rewire a circuit

Choose the list that contains the steps a PLC takes during operation in the correct order:

Check I/0, store data in memory, logically execute program, update outputs

Which statement is true of data files?

Allen Bradley PLCs refer to registers as data locations

What is the purpose of a circuit's logic function? Logic functions:

Determine the operation of a circuit

Which of the following statements are true when troubleshooting PLCs?

Errors are classified as programming and hardware

Solid-state device that replace relay circuits - provide electrical control

Which is NOT the best practices when installing PLC hardware:

Humidity should be high enough to allow for condensation, above 65%

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Questions 14

Answers

1
A PLC power supplyL
Uses converters to make linear DC power because of its smooth voltage
Provides power to the input and output devices
Is always built into the CPU
2
What best describes the basic layout or structure of a PLC system?
The inputs perform the action when told via a signal sent by an input relay
The basic PLC setup follows a pattern of input to software to output
Inputs and outputs -internal software devices replacing physical components
3
Which is true about how binary data is communicated?
The binary system has only two characters available
Binary words vary greatly in length depending on signal strength
Binary data has 26 letters used to remember information
4
Pushbuttons, photo eyes, and limit switches are all examples of:
Output devices
Input devices
Internal relays
5
What is the main difference between CompactLogix and ControlLogix
Devicenet that allows for multiple device control is only in controllogix
Contrologix has guard security protocols
Compactlogix only allows for 8 inputs and eight outputs
Compactlogix is for application that are machine-level control applications
6
Which statement about the I/O section of a PLC is true? The I/O section of a PLC:
Cannot be located far away from the controller of the PLC
Sends the power signals to and from I/O devices
Has screw terminals that convert AC to DC
Has a very limited selection of sizes, configurations, or capacities
7
Which statement is true of digital devices?
Any device that has two possible states is considered binary
A word is the smallest unit of microprocessor data
A nibble is a larger digital unit than a byte
8
What was the main reason PLCs were invented?
There was previously no way to provide electrical control to machines
It is much easier and cheaper to reprogram a PLC than to rewire a circuit
PLCs use a ladder logic that is easy for workers to understand
9
Choose the list that contains the steps a PLC takes during operation in the correct order:
Store data in mem, update the I/O, logically execute the program, check I/O
Check I/0, store data in memory, logically execute program, update outputs
Logically execute program, update the outputs, check I/0, store data in mem
10
Which statement is true of data files?
Allen Bradley PLCs refer to registers as data locations
Data files cannot be retrieved from storage while a program is running
Data files are typically stored strings
11
What is the purpose of a circuit's logic function? Logic functions:
Activate a circuit so that current flows
Store signals to keep a circuit energized
Determine the operation of a circuit
12
Which of the following statements are true when troubleshooting PLCs?
Most PLCs require u2 install a separate diagnostic routine to detect errors
If the CPU light is off + power light is off it means a fatal error occured
All CPU errors can be resolved by power cycling the system
Errors are classified as programming and hardware
13
What is a PLC?
A hard wired machine used in assembly processes to reduce mechanical wear
Solid-state device that replace relay circuits - provide electrical control
System of physical switches that act in a logical fashion to power machines
14
Which is NOT the best practices when installing PLC hardware:
Humidity should be high enough to allow for condensation, above 65%
Wear anti-static wrist and touch a grounded object before handling the CPU
Separate enclosure for transformers, fuses, disconnects, master relays

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