ISC - PLC

The memory on the CPU is where the program resides. What kind of memory is used?

• Static RAM

• Eprom

• Dynamic Ram

• All of the above

What are examples of analog field devices?

• heat detectors, flooding detectors, UV Detectors

• Limit Switch,

  Flame detectors, Motion sensors

• flow meters, pressure sensors, temperature sensors

• Float switch, Infra red detectors, proximity sensors

Which of the following statement best describes a closed system?

• A set of PLC controller devices that automaticallyregulates a process variable to a desired state or set point without human interaction.

• A set of electronic devices that automaticallyregulates a process variable to a desired state or set point without human interaction.

• A set of mechanical devices that automaticallyregulates a process variable to a desired state or set point without human interaction.

• A set of mechanical and or electronic devices that automaticallyregulates a process variable to a desired state or set point without human interaction.

What is the main function of an input module?

• An analog to digital signal converter for the CPU to process

• A digital to analog signal converter for the CPU to process

• A signal isolator

• All of the above

What does the CPU performs in the PLC controller?

• It It implements specific instructions, such as;

  i. Logic

  ii. Process Sequencing

  iii. Timing

  iv. Coupling

  v. Arithmetic

• It It implements specific instructions, such as;

  i. Logic

  ii. Process Sequencing

  iii. Timing

  iv. Coupling

  v. Arithmetic

• It implement specific instructions, such as;

  i. Process Sequencing

  ii. Timing

  iii. Coupling

  iv. Arithmetic

• It implements specific instructions, such as;

  i. Logic

  ii. Process Sequencing

  iii. Coupling

  iv. Arithmetic

What is the main function of specialised RTD modules?

• It supplies a small milliamp current for each RTD connected tenth input module

• It supplies a small voltage for each RTD connected tenth input module

• It reads the voltage drop across the RTD

• All of the above

What is main function of the specialised thermocouple module?

• To compare the room temperature vs measured temperature

• To provide cold junction compensation

• To supply a milliamp current

• To normalise the the room temperature and measured temperature

Are the PLC Controller modules able to be hot swapped under power?

• Yes

• No

• Under some instances

• Under isolated cases

What is the communication protocol used in a Modicon/Momemntum PLC system between PLC and I/Os?

• Modbus

• Modbus+

• TCP/IP

• Modbus RTU

What physical medium used for transmission of data amongst the switches in the network?

• Unshielded twisted pair cables

• Shielded twisted pair cables

• Multimode Fibre optic cables

• Single mode Fibre optic cables