Exploring Fieldbus Technologies

What is the primary function of the Modbus protocol?

• To facilitate data storage in databases.

• To enhance the security of network communications.

• To provide a graphical user interface for devices.

• To enable communication between industrial devices.

HART communication is based on which modulation technique?

• Frequency shift keying (FSK)

• Amplitude modulation (AM)

• Phase shift keying (PSK)

• Time-division multiplexing (TDM)

What are the key features of HART communication?

• bidirectional communication, compatibility , digital communication capabilities, standard command usage.

• with 4-20 mA signals

• low-speed data transmission

• support for multiple devices,

How does Fieldbus communication differ from serial communication?

• Serial communication can connect multiple devices simultaneously.

• Fieldbus is slower than serial communication.

• Fieldbus supports multiple devices and real-time communication

• Fieldbus is only used for wireless communication.

CRC error checking in Modbus is used to:

• Compress data packets

• Encrypt data

• Detect communication errors

• Synchronise devices

What are the advantages of using Foundation Fieldbus?

• Increased installation time

• reduced wiring costs

• real-time data exchange, Interoperability

• Improved communication reliability, enhanced diagnostics, , and support for advanced control strategies.

Which of the following is true about Modbus RTU?

• It uses Ethernet for communication

• It is a text-based protocol

• It is binary-based and more efficient than ASCII

• It supports only wireless communication

What components are essential in a Foundation Fieldbus system?

• Field devices

• power supplies

• Wireless communication devices

• Fieldbus network

How does HART communication enhance traditional 4-20 mA signals?

• HART communication reduces the signal range of 4-20 mA to 0-10 mA.

• HART communication replaces 4-20 mA signals entirely.

• HART communication only transmits analog signals without any digital data.

• HART communication allows for digital data transmission alongside 4-20 mA signals, enabling enhanced diagnostics and configuration.

Which layer of the OSI model does Modbus primarily operate on?

• Network layer

• Transport layer

• Application layer

• Physical layer