HW5 Chapter 5 - PLC

What is the main function of the ladder logic diagram program?

• To compute scan time

• To organize memory files

• To store input and output status

• To control outputs based on input conditions

Which PLC programming language is designed to mimic hardwired relay logic?

• Instruction list programming language

• Sequential function chart programming language

• Ladder diagram language

• Functional block diagram programming

What is the function of the Examine If Closed (XIC) instruction in ladder logic?

• To allow rung continuity when the input is true

• To examine if the contact is open

• To allow rung continuity when the input is false

• To de-energize the output

What is the purpose of the Output Energize (OTE) instruction in ladder logic?

• To store input and output status

• To create parallel paths of input conditions

• To examine if the contact is open

• To energize or de-energize the output

What is the advantage of using internal outputs in PLC programming?

• Speeds up processor scan time

• Increases the number of series contacts allowed

• Directly controls an output field device

• No physical connection to a field device is needed

Which mode of operation is used to execute the user program in a PLC processor?

• Test mode

• Program mode

• Remote position

• Run mode

What is the function of the timer file in the processor's memory?

• Stores input and output status

• Stores the timer status and timer data

• Stores integer data values

• Stores data that requires a decimal point

Which instruction in ladder logic looks and operates like a normally open relay contact?

• Examine If Closed (XIC)

• Examine If Open (XIO)

• Output Energize (OTE)

• Branch instructions

What is the purpose of branch instructions in ladder logic?

• To store input and output status

• To energize or de-energize the output

• To create parallel paths of input condition instructions

• To examine if the contact is open

How is the memory structure for a PLC processor organized?

• With sequential function chart programming language

• With ladder diagram and functional block diagram

• With tag-based and rack-based memory structures

• With structured text program