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Network connection of Modbus RTU fieldbus components made easy

Wednesday, June 3, 2020

In industrial and building automation projects, the connection of different fieldbus devices in a network infrastructure is already known. The challenge is to connect different manufacturers with different protocol standards in a comprehensive IP network. Sensors and actuators on the fieldbus level, which communicate via Modbus RTU, must be integrated into a Modbus TCP network.

For the conversion of the Modbus RTU protocol into a Modbus TCP protocol, a Modbus gateway is used. The Modbus gateway is a Modbus RTU/ Modbus TCP gateway which primarily converts Modbus RTU protocols to Modbus TCP protocols (or reversed).

The METZ CONNECT Modbus Gateway MR-GW helps to integrate Modbus RTU devices into a Modbus TCP network and offers a very simple and cost-effective communication option of Modbus TCP clients with one or more Modbus RTU slaves.

Modbus Gateway MR-GW
System Overview


Simple configuration via webinterface

Simple configuration via webinterface

The MR-GW guides the user in a very short time through the configuration of the device via an intuitive menu navigation. A modern and user-friendly responsive design allows the device to be easily parameterized with smartphone, tablet or laptop.


Simple configuration via webinterface


Features

The Modbus gateway MR-GW offers a high level of comfort connecting Modbus RTU fieldbus modules in an IP network:

Status monitoring

Status monitoring

The Modbus gateway provides an overview of the current connection status of the respective Modbus TCP client connections. The status, duration, all Modbus TCP client requests (including incorrect) and Modbus RTU responses are displayed.

Simple Modbus RTU device search

Simple Modbus RTU device search

This function is used to search and display all connected Modbus RTU devices. Initial function tests can be performed and simple Modbus RTU commands can be executed.

Fast connection via jumper plug technology
Fast connection via jumper plug technology

The Modbus Gateway can be easily connected to Modbus RTU I/O components using the proven METZ CONNECT jumper plug technology. This not only reduces the wiring effort for the power supply and bus connection, but also enables seamless integration of the entire METZ CONNECT Modbus RTU module series MR-xx.

Application in building automation

In many building automation projects, customers demand a consistent connection of all automation components into a structured network cabling inside the building. Fieldbus components, e.g. temperature sensors or measuring devices, usually have a Modbus RTU interface. They are integrated into the automation level by a Modbus TCP controller. The use of a controller is oversized in many applications, because of the complex programming and expensive hardware. The optimal solution is using a Modbus gateway. With the function of a protocol converter, the Modbus gateway enables simple integration of Modbus RTU slaves into a Modbus TCP network.


Example of use

Interconnection of 2 Modbus RTU lines in an IP network

Example of use


Your benefits

  • connection of max. 32 Modbus RTU Slaves per line
  • Ethernet available throughout the building
  • no limitation to cable lengths
  • independent of technology and manufacturer
  • defined and default METZ CONNECT Modbus RTU slave devices

    Innovation and consistency

    The MR-GW is easy and intuitive to configure and establishes communication from the fieldbus level to an IP network very quickly. The new Modbus Gateway provides the base for modern building automation systems. By simply adding and integrating METZ CONNECT Modbus RTU I/O fieldbus modules, METZ CONNECT offers a consistent product range for intelligent system components in building automation.


    We offer more - Complementary METZ CONNECT products

    The project planning of automation systems requires additional control cabinet, peripheral and network infrastructure components. METZ CONNECT offers an extensive range of products for comprehensive and transparent communication "from the field level to the management level".


    Coupling relays & interface modules
    Coupling relays & interface modules

    with integrated manual operating level for control and manual operation of loads such as valves, pumps, motors, etc.

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    Modbus RTU I/O-fieldbus modules
    Modbus RTU I/O-fieldbus modules

    Compact and intelligent I/O fieldbus modules for decentralized applications with an optimized mixing ratio of inputs and outputs

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    Network infrastructure components
    Network infrastructure components

    Highly specialised, internationally standardised and high-performance network solutions in copper and fiber optic technology such as patch cables, R45 connection units or RJ45 field plugs.

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    Ethernet Switches
    Ethernet Switches

    Compact Ethernet Switches with 10/100BaseT(X) for mounting on standard DIN rails.

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    Do you have any questions on this topic?

    Then simply contact your METZ CONNECT employee using the link below:

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