Modbus profile: serial-connected master

Use this profile to connect a master device using Modbus RTU or Modbus ASCII to the serial port of the device server.

Configuration Options

The serial port connection must be configured for the protocol required by the master, in this case Modbus RTU or Modbus ASCII. If the remote slave supports TCP socket communication, which is the case if the remote slave is connected to another device server, Digi recommends this option. Modbus/TCP is the other supported network option. This master can be configured to control up to 8 slaves.

Setup Information

To configure the port for Modbus ASCII or Modbus RTU and the network for TCP socket communication, see Configure a serial-connected master: TCP/UDP sockets.

To configure the port for Modbus ASCII or Modbus RTU and the network for Modbus/TCP, see Configure a serial-connected master: generic procedure.