User`s manual

MGate MB3000 User’s Manual Typical Applications

3-3

Modbus TCP Masters with ASCII and RTU Slaves

Link TCP master devices with both ASCII and RTU serial devices simultaneously

When integrating Modbus networks, you may encounter different Modbus serial networks that use

different baudrates or a different protocol. Modbus ASCII might be used by some devices, while

Modbus RTU is used by other devices.

The MGate MB3280 and MB3480 can integrate serial Modbus networks that use different

parameters or protocols. You can configure each serial port to a specific Modbus serial

environment, set up an SID map. After configuration, only the gateway will be visible to Modbus

TCP masters, and all serial devices will be integrated behind it.

Serial Master with Serial Slaves over Internet

Let Modbus serial devices communicate over the Internet

Many Modbus devices communicate over RS-485, which limits the number of devices in a

network to 32 and the transmission distance to 1.2 km.

With the MGate MB3000 Modbus gateway, you can link all Modbus devices over an Ethernet

network. Up to 32 Modbus gateways can be installed in a single control network, so each device

can now be accessed from anywhere the TCP/IP network can reach.

MB3000

MB3000 MB3000 MB3000

RS-485

RS-232

Modbus/RTU

Master device

Modbus/RTU

Slave devices

Ethernet

Flow meter

Drives

Loop controller

Power measurement

PLC

DCS