Lantronix G520 G520 User Guide - Page 203

17: Tunnel Tunneling allows serial devices to communicate over a network without being aware of the devices that establish the network connection between them. The Tunnel settings allow you to configure how the serial network tunneling operates. Tunneling is available on serial lines. The connections on one serial line are separate from those on another serial port. Tunnel Statistics Tunnel statistics contains data counters, error counters, connection time and connection information. Aggregate and individual connection statistics are displayed. To view tunnel statistics, go to Tunnel and select Tunnel 1, Tunnel 2, Tunnel SPP Slave, or Tunnel SPP Master. Tunnel Modbus RTU to Modbus TCP The G520 series gateway acts as a converter between a Modbus RTU and a Modbus TCP device. Modbus RTU polls the data from the Modbus slave and sends it to the Modbus master using Modbus TCP. To use this feature, configure the serial interface and TCP interface. You can use either the RS-232 or RS-485 interface. To configure the serial interface: 1. Go to Serial and select Serial 1 (RS232) or Serial 2 (RS485). 2. Configure the serial port settings. 3. Select Mode as Tunnel/Modbus RTU to Modbus TCP. 4. Click Save & Apply. To configure the TCP interface: 1. Go to Tunnel and select Tunnel 1 or Tunnel 2. 2. Under Modbus RTU to Modbus TCP, select Enable and then enter the configuration settings. See Table 17-1 3. Click Save & Apply. Field Enable Protocol Table 17-1 Tunnel for Modbus RTU to Modbus TCP Description Select to enable and configure the Modbus RTU to Modbus TCP settings. TCP option is selected. G520 Series IoT Cellular Gateway User Guide 203