PLC Memory Quiz

What is the term used for a PLC continuously running through its program and updating it as a result of input signals?

• Cycle

• Loop

• Sequence

• Iteration

What is the purpose of system read-only-memory (ROM) in a PLC system?

• Provides temporary storage for user programs

• Gives permanent storage for the operating system and fixed data

• Stores data temporarily during processing

• Manages input and output operations

What are the two main types of PLC memory?

• Volatile and non-volatile memory

• Temporary and permanent memory

• Static and dynamic memory

• Primary and secondary memory

What type of memory is used for temporary data storage in a PLC?

• Non-volatile memory

• Volatile memory

• Static memory

• Dynamic memory

Which type of memory retains data even when the power is turned off?

• Volatile memory

• Non-volatile memory

• Temporary memory

• Dynamic memory

What happens to the memory location each time it is examined by the CPU?

• It is deleted

• It is revised

• It is ignored

• It is duplicated

What are the two general categories of memory?

• Volatile and non-volatile

• Static and dynamic

• Temporary and permanent

• Internal and external

What happens to volatile memory if all operating power is lost?

• It retains all information

• It loses its stored information

• It becomes non-volatile

• It doubles its capacity

What is the primary characteristic of Read Only Memory (ROM)?

• It can be easily modified.

• It is volatile and loses data when power is lost.

• It stores programs and data permanently.

• It is used for temporary data storage.

What feature do some processors have to provide battery backup when the battery is disconnected?

• Solar panel

• Capacitor

• External hard drive

• USB port