The COM ports are used for serial communication, such as Modbus. With an assigned application and a connected field device, serial communication is enabled in a few steps. The following instructions are an example.

  • Logged in as administrator to the Connect gateway with minimum OS version 5.0.13, an assigned Modbus application (for example, DESIGO Optic, minimum version 2.8.5) and field device (for example Siemens e-meter PAC2200).
  1. In Network > COM ports, connect the selected port (say, COM1) to the application. Modbus protocol is enabled by default.
  1. In Network > Firewall, open a TCP port for the remote tunnel (say, port 8090).
  1. Set up the remote tunnel. The URL is automatically given by the application.
  1. Configure the parameters for the protocol: speed (baud rate), parity and stop bits where indicated in the figure.
  1. Reboot the device.
  1. Open the application over the created tunnel in the Devices Application.

The final configuration steps are application specific. Please refer to the application documentation for details.