PLC Chapter2 HW2

What is the primary purpose of Programmable Logic Controllers (PLCs)?

• To play music

• To control industrial processes

• To manage databases

• To design graphics

What advantage do PLCs offer over hard-wired relay control systems?

• Higher energy consumption

• Increased wiring complexity

• More reliability and flexibility

• Limited communication capabilities

Which type of microprocessors do Siemens PLCs usually use?

• AMD

• Intel

• ARM

• IBM

What is the function of Input/Output (I/O) sections in a PLC?

• To display data

• To store programs

• To interface with field devices

• To cool down the system

What is the significance of the chassis in a PLC system?

• It enhances the PLC's aesthetic appeal

• It houses I/O modules, processor modules, and power supplies

• It reduces the system's overall weight

• It increases processing speed

How are discrete I/O modules characterized?

• By their ability to process analog signals

• By their capability to interface with ON/OFF type devices

• By their large storage capacity

• By their high voltage ratings

What is the role of a Human Machine Interface (HMI) in PLC systems?

• To provide physical support for the PLC

• To replace manual input devices with digital interfaces

• To increase the memory capacity of PLCs

• To enhance the PLC's processing speed

What type of memory is considered volatile in PLCs?

• RAM

• EEPROM

• Flash memory

• ROM

In the context of PLCs, what does the term 'Load Memory' refer to?

• A type of memory used for temporary storage during processing

• Memory used to store the operating system

• Memory containing the user program and hardware configuration

• Memory used for long-term data storage

What is a major issue with PLC outputs when dealing with mixed power sources?

• Increased processing time

• Decreased system reliability

• The need to isolate all power supplies

• Enhanced communication capabilities