Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 87)

Publication 1756-UM534B-EN-P - November 2010 87
Link Module Configuration with RSLogix 5000 Project Chapter 4
Use Monitor Mode to Upgrade an Existing System to a
ControlLogix System
To upgrade an existing system, such as a PLC-5, PLC-3, or SLC system, to a
ControlLogix system, you have to perform these steps.
1. Monitor the network in adapter mode.
2. Write the new control program in RSLogix 5000 programming software
to write to the internal array.
3. Compare the existing system’s outputs with the ControlLogix outputs,
using the same live inputs.
4. Once both systems write the same outputs and have the same timing,
switch over to the RSLogix 5000 control program for control.
Now it’s writing the real outputs instead of the placeholder array, using
the 1756-RIO module to scan the network.
You could use the same 1756-RIO module to monitor and scan the network.
You would have to download the scanner firmware after you compare the
systems using the module in adapter mode to monitor the network. Or, you
could use two 1756-RIO modules; one as a scanner, and one as an adapter on
the Remote I/O network.
The following example breaks down the process. It explains using the 1756-
RIO module:
• as an adapter and its configuration in the configuration tool’s I/O tree.
• with the configuration tool to create the aliases based on the I/O
configuration tree.
• configuration tool’s process of exporting aliases to convert an existing
system to a ControlLogix system using the module in scanner mode.
Create a Network Configuration and Export Aliases
Follow these steps to create a network configuration in the configuration tool
and to create the aliases based on that configuration.
1. Set the 1756-RIO module to adapter mode.
See Launch the Configuration Tool and Select the Module Mode on
page 30 .
2. Create the network configuration in the configuration tool’s tree for the
1756-RIO module in adapter mode.