modbus

Modbus is a communication protocol and protocol specification used to communicate between different devices in industrial automation systems. It was developed in the 1970s and became popular in industries for its ability to easily and reliably transfer data between devices.

There are different variants of the Modbus protocol, among which the most famous are:

Modbus RTU (Remote Terminal Unit): This version uses an asynchronous serial communication protocol to transfer data in binary form. Each character is represented as a group of bits, which simplifies communication and enables efficient data transfer.

Modbus ASCII: This variant also uses an asynchronous serial protocol, but the data is represented in ASCII format. This may be less efficient compared to Modbus RTU, but provides the ability to check for errors through visual inspection.

Modbus TCP/IP: This is a variant of Modbus that uses Ethernet and TCP/IP protocols for communication. This protocol enables the connection of various devices to the network and the sending of data within IP packets.

Modbus is used to communicate between various devices in industrial environments, including sensors, actuators, controllers, PLC (Programmable Logic Controller) and other elements of automation systems. The protocol allows data to be read and written between devices and is often used for monitoring, control and management in industrial environments.

One of the advantages of Modbus lies in its simplicity and wide support among different equipment manufacturers. This means that different devices from different manufacturers can communicate with each other, which is important in industrial applications where different technologies and devices are often combined.