User Documentation

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8.3 Serial Master (RTU) with multiple serial Slaves (RTU) over
Ethernet
Application:
One serial Master (Modbus RTU/ASCII) is connected to the serial port of the Modbus Gateway.
At remote side multiple groups of serial Slaves are connected each to a Modbus Gateway.
Each Modbus Gateway is able to communicate via Ethernet/Internet with each other.
Using this scenario a serial Master can access a serial Modbus control network over long distances by
using Ethernet/Internet connections. Up to 32 Modbus Gateways can be installed in a single control
network.
The Modbus RTU Master can access the serial devices of the Modbus network by addressing them
via their virtual public -Master Gateway).
Screenshot of Slave ID Map of Gateway running as Modbus RTU Master