MODBUS Quiz

Which of the following is the alternative name of Modbus protocol ____________.

• Data transfer protocol

• Data Communication Protocol

• Data retrieving protocol

• None of the above

What is the default baud rate for Modbus RTU?

• 9600

• 19200

• 38400

• 57600

What is the Modbus function code for writing a single coil?

• 05

• 06

• 15

• 16

Is Modbus protocol a master-slave or peer-to-peer protocol?

• Master-slave

• Peer-to-peer

Which Modbus protocol variant uses ASCII character encoding?

• Modbus RTU

• Modbus ASCII

Which Modbus function code is used to read the status of discrete inputs?

• 01

• 02

• 03

• 04

How is the Modbus slave address specified in a Modbus RTU packet?

• As a 2-byte value

• As a single byte

• As a 4-byte value

• As a 6-byte value

What is the default value of the transaction identifier in a Modbus TCP packet?

• 0

• 1

• 2

• 3

Modbus RTU is a communication protocol developed by

• Modicon

• JOhn

• David

• Modian

What is the Modbus function code for writing multiple holding registers?

• 13

• 14

• 15

• 16