Modbus Overview

Modbus is a communication protocol that allows devices to communicate over serial lines (RS-232/RS-485) or TCP/IP networks. It supports two main types:

• Modbus RTU: A binary protocol typically used over serial communication (RS-485 or RS-232).
• Modbus TCP: A version of Modbus that uses TCP/IP for communication over Ethernet networks.

Modbus allows for the transfer of data (such as readings from sensors or control commands) between devices, typically using client-server communications. This is characterized by communication between client devices that initiate communication and make requests of server devices that process requests and return an appropriate response (or error message).

The Modbus point manager implements the Modbus communication protocol in GENESIS, and it is typically used for industrial automation and data acquisition. The Modbus protocol is a widely used communication standard for connecting devices in industrial environments, such as programmable logic controllers (PLCs), sensors, actuators, and other automation devices.

What's Next?

• Modbus Data Model
• The Purpose of Modbus Conversions