The first thing you will do is create four control modules for the process equipment and flow loop. In the figure above, the labels in the ovals (LI-101, MTR-101, and so on) are the names you will give to the DeltaV control modules. The labels LT-1, FT-1, XI-1, and so on, are the Device Tags that you will use for the transmitters, valves, and other I/O instruments.
The Device Tags are assigned to I/O card channels as part of the I/O configuration process.