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When it comes right down to it, these two protocols exist so that you can transmit data in a way that is cost effective and comfortable for you. The benefit of using Modbus TCP/IP is using the existing Ethernet network equipment that is widely and available and cost effective.” ”Essentially, the Modbus TCP/IP command is a Modbus RTU command included in an Ethernet TCP/IP wrapper. The TCP, or transport protocol, is used to ensure data is received and sent correctly, and the IP is the address and routing information.”
#Modbus tcp vs modbus rtu serial#
The Modbus data structure is defined using the application layer used in the TCP/IP protocol. Modbus RTU over TCP allows you to use an Ethernet port to communicate with the serial Modbus devices by adding a terminal server box at each remote device.
![modbus tcp vs modbus rtu modbus tcp vs modbus rtu](https://www.beckhoff.com/media/pictures/content-images/products/i-o/modbus_e.jpg)
“Modbus TCP/IP is basically the Modbus RTU protocol using the TCP interface in an Ethernet network. Our very own Kyle Yost, Design Engineer, explains: Modbus TCP/IP was developed to take advantage of the benefits of an Ethernet network.
#Modbus tcp vs modbus rtu software#
RTU is extremely popular for industrial control networks as it has been around for a long time, and there is a lot of hardware and software that support it. Modbus sensors and devices can be daisy-chained in a network.
![modbus tcp vs modbus rtu modbus tcp vs modbus rtu](https://s3.amazonaws.com/opc-downloads/product_picture/5a455d1cd72e55482bc904022efde9e6161848991027345514.png)
Modbus RTU is a network of field devices using serial communication. You can have a lot of issues trying to get the RS485 network to work correctly. Modbus TCP/IP also uses a 6-byte header to allow routing. While Modbus defines how the data is structured for transmission, RTU and TCP/IP wrap the structured data for specific methods of transmission. The most basic difference between MODBUS RTU and MODBUS TCP/IP is that MODBUS TCP/IP runs on an Ethernet physical layer, and Modbus RTU is a serial level protocol. Essentially, these are simply two different ways of transmitting data. There are two common types of Modbus – RTU and TCP/IP. Modbus is a popular fieldbus that allows a lot of data to be transferred, and supports two-way communication for remote operation (such as device programming and set-up). Fieldbus is a type of communication protocol that allows networking industrial devices, such as pressure transducers and level sensors to a PLC. The specific way data is packaged and transmitted is known as a communication protocol.