Configuring A Channel For Modbus Rtu Master - Allen-Bradley SLC 500 Series Reference Manual
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Modbus protocol may not be consistently implemented in
IMPORTANT
the field. The Modbus specification calls for the addressing
range to start at 1; however, some devices start addressing
at 0.
The Modbus Data Address in the Message Setup Screen
may need to be incremented by one to properly access a
Modbus slave's memory, depending on that slave's
implementation of memory addressing.
Configuring a Channel for Modbus RTU Master
To configure a channel for Modbus RTU master, first place the processor into
program mode and do the following using your programming software:
To bring up the Channel Configuration
interface, double-click on the Channel
Configuration icon.
SLC Communication Channels
Publication 1747-RM001G-EN-P - November 2008
13-91
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