Lantronix X300 Series X300 Series User Guide Rev B - Page 190

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 the serial line. Tunnel Statistics Tunnel statistics contains data counters, error counters, connection time and connection information. Statistics are available at each individual connection and aggregated across all connections. To view tunnel statistics, go to Tunnel and select Tunnel 1, Tunnel SPP Slave, or Tunnel SPP Master. Tunnel Modbus RTU to Modbus TCP The 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 Modbus Master using Modbus TCP. To use this feature, configure the serial interface and TCP interface. To configure the serial interface: 1. Go to Serial and select Serial 1. 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. 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 Mode 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.  Server - the gateway acts as a server and listens for the TCP connection from the external Modbus master. TCP Port number is required.  Client - the gateway acts as a TCP client and sends the TCP connection request to the external Modbus master. The IP address and TCP port of the Modbus master is required. X300 Series IoT Cellular Gateway User Guide 190