Rockwell Automation 2706-NP3 DL20 OFFLINE PROGRAMMING MANUAL - Manual (Page 30)

Message Operations
Chapter 5
5–7
The screen below shows the text for Message 20 entered in the first
two blocks.
2. When finished entering the message text, press [End]. Message 20 is
automatically saved to file MSG0020.DAT.
The screen clears and returns you to the Message Number prompt. Type
another message number or press [End] to return to the Main Menu.