Allen-Bradley MicroLogix 1400 Instruction Manual page 432

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430 Communications Instructions
Publication 1766-RM001A-EN-P - October 2008
Example 4 - Configuring a Modbus Message
This section describes how to configure a local message using the
Modbus communication commands. Since configuration options are
dependent on which channel is selected, the programming software has
been designed to only show the options available for the selected
channel.
Before configuring the MSG instruction, open the Channel Configuration
screen and set the Driver to Modbus RTU Master. For more information
on Channel Configuration, see Modbus RTU Master Configuration on
page 612.
Message Setup Screen
Rung 0 shows a standard RSLogix 500/RSLogix Micro message (MSG)
instruction preceded by conditional logic.
1. Access the message setup screen by double-clicking Setup Screen.
2. The RSLogix 500/RSLogix Micro Message Setup Screen appears.
This screen is used to setup or monitor message parameters for
"This Controller", "Target Device", and "Control Bits". Descriptions
of each of these sections follow.