PLC

Question 2

ControlLogic PLC timers have only one time base which is

Answer 2

0.001 Second

Question 3

Factor I/O only works with RS Studio (T or F)

Answer 3

False

Question 4

To link factory I/O to the controller they must both have the same MAC Address (T or F)

Answer 4

False

Question 5

An example of a discrete Input device for a PLC would be an inductive prox switch (T or F)

Answer 5

True

Question 6

Multiple programs can be store in a PLC and a programmer can choose which one to run (T or F)

Answer 6

True

Question 7

A push button which is wired normally open in the field will be:

Answer 7

False on the screen when not pushed, if programmed EXAMINE IF ON

Question 8

Factory I/O will only recognize a program from a PLC if

Answer 8

tags much be controlled, type alias and same subnet

Question 9

In a PLC ladder diagram, the output coil is always displayed:

Answer 9

ON the right

Question 10

what is an example of a discrete output device

Answer 10

Contactor

Question 11

If a limit switch is wired to the negative of the supply, then the input module is said to be

Answer 11

Sourcing

Question 12

The examine if off instruction can be used to check for bit status of

Answer 12

Internal bit
Input date file (I:0)
output date file (O:0)

Question 13

A starter with a coil rated at 480v must pick up as a result of a 240v rated relay type PLC output going on. What is required

Answer 13

A electromechanical relay with 240v coil and 480v rated contacts

Question 14

A selector switch would be considered an input field device on a PLC (T or F)

Answer 14

True

Question 15

A pilot light would be considered an input field device for a PLC (T or F)

Answer 15

False

Question 16

In a PLC system, there is an electrical connection between the field input devices and the output devices (T or F)

Answer 16

False

Question 16

A PLC address of Local:1:I.data.14 refers to:

Answer 16

Bit 14, Input, Module, Slot 1

Question 17

A start button, which is normally wired normally open in the field will be:

Answer 17

False on the screen when not pushed, if programmed EXAMINE IF ON

Question 18

If a photo-eye input switched to the negative when it detects an object, then the device is:

Answer 18

Sinking and the input module must be sourcing

Question 19

A example of a discrete input devices from PLC would be a potentiometer (T or F)

Answer 19

False

Question 20

A stop button that is wired normally closed in the field would be FALSE on the screen when not pushed and programmed EXAMINE IF OFF (T or F)

Answer 20

False

Question 21

A solenoid is NOT an example of a PLC discrete input device (T or F)

Answer 21

True

Question 22

A programmed PLC latches do not require any wiring (T or F)

Answer 22

True

Question 23

A large number of Examine if OFF or examine if ON instructions can be drived by one PLC Latch coil (L) instruction (T or F)

Answer 23

T

Question 24

A stop button that is required to 'FAIL SAFE" MUST be wired normally

Answer 24

Closed

Question 24

A latch relay bit that pertains to an internal variable will be of data type

Answer 24

Bool

Question 24

PLC latches have built-in undervoltage protection (T or F)

Answer 24

False

Question 25

With in a PLC, the process of continuously reading the inputs, executing the program and setting the outputs in called:

Answer 25

Scanning

Question 26

What is the process of a PLC synchronous scan

Answer 26

1 - Reading the inputs 2 - Executing the program 3 - Setting the outputs

Question 27

Compactlogix time DoNe bit addresses refer to internal bits that may be used to drive coils that have real I/O addresses (T or F)

Answer 27

True

Question 27

If you are using a counter, which bit must be utilized to start the count over again

Answer 27

Reset bit

Question 27

A moving box on a converyor stops the conveyor by breaking a photo-eye beam. The operator will then restart the converyor by stepping on a foot switch momentarliy until the box clears the beam

Answer 27

The foot switch N.O and the photo eye contact closed with the beam broken