Rockwell Automation 1771-DA,D17716.5.13 U MNL 1771-DA ASCII I/O MODULE - Manual (Page 14)

Getting Started with Your ASCII Module
Chapter 2
2Ć7
2. Locate the programming plugs and set them according to RS-232-C
without control lines (figure 2.8).
Entering the ““Getting Started Program””
You may want to record on tape the ladder diagram of your application
program before proceeding because you will need to load ASCII logic
into a cleared memory for chapters 1 and 3.
Using your industrial terminal, enter the ““Getting Started Program””
(Figure 1.3) into processor memory. At this point, you do not need to
understand how the program works, but you should enter it exactly as
shown.