Modbus TCP
Modbus TCP for all our Ethernet modules
In addition to DEDITEC Ethernet protocols, all of our Ethernet modules also support the Modbus TCP protocol.
The latest firmware for the module is required to use this function.
This means that even older modules can be easily equipped with the Modbus function.
What is Modbus?
Modbus is one of the most widely used communication protocols
in automation technology. It is easy to understand and can be used across manufacturers due to its open protocol.
Data exchange is based on a master-slave structure, whereby the master unit initiates requests and the slave units respond to its commands.
The protocol comprises four basic data types:
- Coils -> write and readback – 1 bit
- Discrete Inputs -> read – 1 bit
- Input Registers -> read – 16 bit
- Holding Registers -> write and readback -16 bit
The two most important transmission types are Modbus RTU (serial) and
Modbus TCP (Ethernet-based).
What is Modbus used for?
Modbus is typically used in automation technology, process and plant control systems, building automation, and energy and environmental technology. The most common applications here are communication between a PLC and connected sensors, actuators, or frequency converters, as well as reading energy meters or other measuring devices. This can be done using a mix of Modbus devices from different manufacturers.
Advantages of Modbus
- Open protocol
- Can be used independently of manufacturer
- Modbus TCP can be applied to an existing network infrastructure.
Easy communication thanks to open Modbus protocol
The open Modbus protocol enables fast and uncomplicated communication with our devices. Thanks to the clearly structured register assignment, status and measured values can be conveniently read out or specifically described at any time.
To help you make the most of the possibilities, we provide the complete Modbus protocol as a download.