User`s guide

Modbus Profile: Serial-Connected Slave
58 Chapter 4 Configure Industrial Automation (IA)
Modbus Profile: Serial-Connected Slave
When to Use
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" on page 66.
• To setup a PC and the device server for COM port redirection using
RealPort, see "Set Up COM Port Redirection" on page 69.