Question 1

CLX bit level instructions require ____ addresses.
A)DINT
B)INT
C)BOOL
D)REAL

Accepted Answer

CLX bit level instructions require BOOL addresses, as they manipulate individual bits within memory bytes. DINT, INT, and REAL data types do not have individual bit addresses.

Question 2

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.

Accepted Answer

During each program scan, the processor reads all inputs and takes these values to control the outputs according to the program. This is the basic principle of process control and how a program controls a process.

Question 3

OTL is an acronym for the output unlatch instruction.

Accepted Answer

OTL stands for "Output Latch," which is used in PLC programming to set an output and keep it on or latched until it is specifically turned off by an "Output Unlatch" (OTU) instruction.

Question 4

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

Accepted Answer

An ONS instruction ("output on one shot") is used to turn an output on for one scan only.

Question 5

OTE is an acronym for output empty.

Accepted Answer

OTE actually stands for One-Shot Output, not Output Empty.

Question 6

All ladder logic rung contacts represent output instructions.

Accepted Answer

Ladder logic rung contacts can represent both input and output instructions.

Question 7

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

Accepted Answer

Internal relay instructions are used to perform logical operations within the PLC program without the need for physical input or output devices; they act as internal switches or flags.

Question 8

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

Accepted Answer

This is true. A tag is essentially a variable name used to store information in a programmable logic controller (PLC) or other type of control system. It can be used to represent anything from a sensor value to an output signal, and can be accessed and manipulated by the controller's logic program.

Question 9

A CLX controller executes the program in real time.

Accepted Answer

CLX controllers are designed to execute the program in real time, meaning that they process the code as it is received without delay. This is important in applications where rapid response times and precise control are required.

Question 10

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

Accepted Answer

The answer of The edit tags window shows the state...

Question 11

XIO is an acronym for examine if open.

Accepted Answer

The answer of XIO is an acronym for examine if...

Question 12

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.

Accepted Answer

A CLX processor has the capability of updating the input tag from the field and writing the output tag to the field at various points during program execution.

Question 13

XIC is an acronym for examine if closed.

Accepted Answer

XIC is an acronym for examine if closed.

Question 14

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

Accepted Answer

A ladder logic program rung can contain only output instructions, such as setting or resetting a bit, but it needs at least one input instruction to trigger the execution of the rung.

Question 15

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

Accepted Answer

Tag-based addressing uses tags to identify data instead of memory addresses, allowing for greater flexibility in the memory structure.

Question 16

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

Accepted Answer

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

Question 17

All ladder logic rung coil instructions are input instructions.

Accepted Answer

Ladder logic rung coil instructions are output instructions. They are used to control outputs based on the status of inputs.

Question 18

OTU is an acronym for the output latch instruction.

Accepted Answer

OTU is an acronym for One's Complement Unary. The instruction for the output latch is OUT.

Question 19

ONS is an acronym for the on instruction.

Accepted Answer

ONS is not an instruction in any programming language.

Question 20

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

Accepted Answer

CLX logic allows for multiple output instructions to be placed in parallel on a single rung, allowing for more efficient and streamlined programming.

Quiz 16: Controllogix Controllers - Part 2 - Bit Level Programming

CLX bit level instructions require ____ addresses.

During each program scan the processor:

OTL is an acronym for the output unlatch instruction.

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

OTE is an acronym for output empty.

All ladder logic rung contacts represent output instructions.

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

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

A CLX controller executes the program in real time.

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

XIO is an acronym for examine if open.

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.

XIC is an acronym for examine if closed.

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

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

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

All ladder logic rung coil instructions are input instructions.

OTU is an acronym for the output latch instruction.

ONS is an acronym for the on instruction.

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