Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 118)

Publication AG-UM008C-EN-P - February 2005
3-50 Configuring MicroLogix 1100/1200/1500 Controllers
Modbus RTU Slave Configuration
The Modbus RTU Slave configuration screen and configuration
procedure are shown below:
1. To set up Channel 0 and data files for Modbus communication,
select the Channel 0 Configuration tab. For the 1764-LRP only,
you can select either Channel 0 or Channel 1.
2. Choose ‘Modbus RTU Slave’ driver and assign driver
characteristics.
3. Enter Modbus Data Table File Numbers. Select the Expansion
check box to utilize multiple holding register data files. (All
MicroLogix 1100, MicroLogix 1200 Series C FRN6 and higher,
and MicroLogix 1500 Series C FRN7 and higher only. Requires
RSLogix 500 version 5.50 or higher to program.)
TIP
The controller default is one data file of 256 registers.
The Expansion check box enables an additional five
files and 1280 holding registers.
The five additional tables do not need to be
individually defined, but sequentially follow the first
integer or bit file. For example, if the first file is N10
(or B10), then the additional five files will be N11 (or
B11), N12 (or B12), N13 (or B13), N14 (or B14), and
N15 (or B15).