Rockwell Automation 1771-DA,D17716.5.13 U MNL 1771-DA ASCII I/O MODULE - Manual (Page 129)

ASCII I/O Module Tutorial
Chapter 4
4Ć55
When programming your module in report generation mode, do the
following:
Convert message variables such as timer/counter accumulated values to
BCD by moving them to a decimal file.
Use output files for storing messages to avoid unwanted conversions.
Move message variables into words segregated by delimiters in your
message file.
With a read/write program, you can enter the text of your message into
processor memory by using the industrial terminal as an ASCII data
terminal (as compared with entering data in the data monitor mode of the
industrial terminal described in sections titled “Formatting a Single-Line
Message” and “Formatting a Multi-Line Message.” When entering data
from an ASCII data terminal, you can use the rubout or delete key.
Pressing this key deletes the previous character from the ASCII module’s
input buffer. You can delete one or more characters up to the entire string
bounded by the previous end-of-string delimiter.
NOTE: The correct operation of your module depends on proper
handshake programming for read and write block transfer instructions.
Be sure to read the description of handshaking in chapter 4, block transfer
programming in appendix A, and study the handshake programming
examples.
Summary