Basic PLC Instructions Quiz

What is the function of the output enable instruction in a PLC?

• It enables the logical continuity from left to right

• It enables the ladder logic program

• It enables the outputs

• It enables the input devices

What is the response of a make instruction when it receives a logical zero at the input?

• It deenergizes the output

• It energizes the output

• It does not allow logical continuity from left to right

• It allows logical continuity from left to right

What is the response of a make instruction when it receives a logical one at the input?

• It allows logical continuity from left to right

• It does not allow logical continuity from left to right

• It deenergizes the output

• It energizes the output

What is the response of a break instruction when it receives a logical zero at the input?

• It deenergizes the output

• It energizes the output

• It does not allow logical continuity from left to right

• It allows logical continuity from left to right

What is the response of a break instruction when it receives a logical one at the input?

• It energizes the output

• It deenergizes the output

• It does not allow logical continuity from left to right

• It allows logical continuity from left to right

What is the term used to describe the electromechanical nature of real world field input devices like switches and contacts?

• Logical zero and logical one

• Positive and negative logic

• Normally open and normally closed

• Make and break

What is the term used to describe the absence or presence of full pilot voltage in a PLC system?

• Make and break

• Positive and negative logic

• Logical zero and logical one

• Normally open and normally closed

What is the response of the output enable instruction when it receives a logical zero?

• It disables the outputs

• It enables the outputs

• It enables the ladder logic program

• It enables the input devices

What is the response of the output enable instruction when it receives a logical one?

• It disables the outputs

• It enables the input devices

• It enables the ladder logic program

• It enables the outputs

What is the function of the parentheses enclosing the output of interest in a PLC program?

• It enables the input devices

• It enables the ladder logic program

• It enables the outputs

• It disables the outputs