Modbus profile: serial-connected slave

Use this profile to connect a slave device (or devices) using Modbus RTU or Modbus ASCII. This profile is applicable to environments in which multiple masters will control the slave or slaves.

Configuration Options

The serial port connection must be configured for the protocol required by the slave, in this case Modbus RTU or Modbus ASCII.

The network connection usually does not require configuration. The only exception is if the master requires COM port redirection. In this case, the master is an application that resides on a PC, such as a Microsoft Windows system, and communicates only with devices on COM ports.

Setup Information

To configure the serial port for Modbus ASCII or Modbus RTU, see Configure a serial-connected slave: generic procedure.

To setup a PC and the device server for COM port redirection using RealPort, see Set up COM port redirection.