Specifications

• Select the type of translation from Modbus to RipEX IP address (mask or table), as described in

chapter 3.

• Set the UDP interface to COM1 or COM2 depending on the port that the remote RipEX uses to

connect to the Slave device.

To set up RipEX connected to Modbus RTU Slave:

• As described in chapter 1 set the appropriate COM to Modbus and the Mode of Connected to Slave.

8.5. Master Modbus TCP, slaves Modbus RTU or Modbus TCP

RipEX radio modems enable full featured cooperation between the Master using Modbus TCP and

slave devices using Modbus RTU or Modbus TCP within a single network.

RS232

ModbusRTU

RS485

ModbusRTU

ETH

ModbusTCP

LocalTCP

connection

ETH

ModbusTCP

LocalTCP connection

ETH

ModbusTCP

LocalTCP connection

Fig. 8.6: Modbus TCP, Slave RTU or TCP

To set up RipEX connected to Modbus TCP Master:

• Set the translation from Modbus to RipEX IP addresses to table-based, as described in chapter 3.

• For devices connected over Modbus RTU, set the UDP interface to COM1 or COM2 (as in chapter

4).

• For devices connected over Modbus TCP, set the UDP interface to TS1-TS5, as described in chapter

• You can define address ranges in the table for greater ease of use.

To set up RipEX connected to Modbus RTU Slave:

• See chapters 4 and 1 respectively.

To set up RipEX connected to Modbus TCP Slave:

• See chapter 3.

8.6. Multiple Modbus TCP or Modbus RTU Masters and Slaves

Any combination of network designs described in chapters 1–5 is possible. The only limitation is that

a Master with Modbus RTU cannot communicate with a Slave using Modbus TCP.

Modbus TCP/RTU