Deck 14: Bit Level Programming

Question 1

OTU is an acronym for the output latch instruction.

Answer 1

False

Question 2

A CLX controller executes the program in real time.

Answer 2

True

Question 3

A tag is a text-based name for an area of the controller where data is stored.

Answer 3

True

Question 4

Tag-based addressing is not tied to specific memory locations in the memory structure.

Question 5

A CLX processor can update the input tag from the field and write the output tag to the field at different points during execution of the program.

Question 6

Output instructions can be placed in series on a rung in CLX logic.

Question 7

XIO is an acronym for examine if open.

Question 8

A ladder logic program rung does not need to contain any input instructions.

Question 9

All ladder logic rung contacts represent output instructions.

Question 10

Output instructions can be placed in parallel on a rung in CLX logic.

Question 11

CLX bit level instructions require ____ addresses.

A)DINT
B)INT
C)BOOL
D)REAL

Question 12

All ladder logic rung coil instructions are input instructions.

Question 13

Internal relay instructions are used when real-world field devices are needed as input or output reference instructions.

Question 14

ONS is an acronym for the on instruction.

Question 15

During each program scan the processor:

A)reads all inputs and takes these values to control the outputs according to the program.
B)reads all outputs and takes these values to control the inputs according to the program.
C)reads all inputs and adjusts these values to control the outputs according to the program.
D)reads the program and adjusts all inputs and outputs accordingly.

Question 16

The edit tags window shows the state of the tags created for a program.

Question 17

An ONS instruction can be used to turn an output on for one scan.

Question 18

OTL is an acronym for the output unlatch instruction.

Question 19

OTE is an acronym for output empty.

Question 20

XIC is an acronym for examine if closed.

Question 21

Internal relay instructions are used when:

A)real-world input field devices are needed as inputs.
B)real-world output field devices are needed as outputs.
C)other than real-world field devices are needed as input or output reference instructions.
D)both a and b.

Question 22

When creating a ladder rung:

A)all input instructions must be to the right of an output instruction.
B)a rung must contain at least one input instruction.
C)the last instruction must be an output instruction.
D)all of these.

Question 23

For the motor start/stop program shown, what would the value of the tags be when the motor is not operating?

A)Motor_Start (0), Motor_Stop (1), Motor_Run (0)
B)Motor_Start (0), Motor_Stop (0), Motor_Run (0)
C)Motor_Start (1), Motor_Stop (1), Motor_Run (0)
D)Motor_Start (1), Motor_Stop (1), Motor_Run (1)

Question 24

The OTL instruction

A)is a retentive output instruction.
B)even if the status of its input becomes false.
C)is used in conjunction with an OTU instruction with the same referenced tag.
D)all of these.

Question 25

The physical address for the tag Limit_Switch would be:

A)Local:I:3.Data.1
B)Local:I:1.Data.3
C)Local:O:3.Data.1
D)Local:O:1.Data.3

Question 26

The OTE instruction:

A)is true when the rung associated with it has logic continuity.
B)when true can be used to energize an output.
C)when true can be used to set a value in memory to 1.
D)all of these.

Question 27

The XIO instruction:

A)processor checks for a logic input of 0 or 1.
B)returns a true value if the input is logic 1.
C)returns a true value if the input is 0.
D)both a and c.

Question 28

For the latch/unlatch program shown, what would the value of the tags be after momentary actuation of the Fan_Off_ Button?

A)Fan_On _Button (0), Fan_Off _Button (1), Vent Fan (0)
B)Fan_On _Button (0), Fan_Off _Button (0), Vent_Fan (0)
C)Fan_On _Button (1), Fan_Off _Button (1), Vent_Fan (0)
D)Fan_On _Button (0), Fan_Off _Button (1), Vent_Fan (0)

Question 29

The physical address for the tag High_limit_light would be:

A)Local:I:2.Data.5
B)Local:I:5.Data.2
C)Local:O:2.Data.5
D)Local:O:5.Data.2

Question 30

For the one shot program shown, the ADD function is executed:

A)only once per actuation of the limit switch.
B)as long as the limit switch is closed.
C)as long as the limit switch is opened.
D)either b or c.

Question 31

The real-word pushbutton associated with an XIC stop contact in a motor start/stop control logic is:

A)normally closed
B)normally open
C)timed closed
D)timed open

Question 32

The real-word pushbutton associated with an XIC start contact in a motor start/stop control logic is:

A)normally closed
B)normally open
C)timed closed
D)timed open

Question 33

The window shown is an example of creating a tag in the:

A)New Tag window.
B)Controller Organizer window.
C)Edit Tag window.
D)Monitor Tag window.

Question 34

The XIC instruction:

A)processor checks for a logic input of 0 or 1.
B)returns a true value if the input is logic 1.
C)returns a true value if the input is 0.
D)both a and b.