Rockwell Automation 1772-AF4,D17726.5.3 User Manual, AUX FUNCT PROM - Manual (Page 16)

Programming
Chapter 3
3Ć8
b. digit location
Sample entry and display rungs. Although there are several techniques to
enter this data, we use get instructions.
Error messages. If an AF4 function has special error message responses to
specific illegal programming procedures, we state these responses.