Rockwell Automation Logix5000 Controllers ASCII Strings Programming Manual - Manual (Page 12)

Chapter 1 Communicating with an ASCII device
To configure the user protocol, use these steps.
1. In the Controller Properties dialog box, click the User Protocol tab.
• Enter a buffer size greater than or equal to the greatest number of
characters in a transmission. Twice the number of characters is a good
guideline.
• For ABL or ARL instructions, enter termination characters to mark the
end of the data. For ASCII codes, see ASCII Character Codes on page
29 .
If the device sends Then Tips
One termination character • In the Termination Character 1 box, type the
hexadecimal ASCII code for the first character.
• In the Termination Character 2 box, type $FF.
For printable characters, such as 1 or A, type the character.
Two termination characters In the Termination Character 1 and 2 boxes, type the
hexadecimal ASCII code for each character.
• For AWA instruction, enter append characters. For ASCII codes, see
ASCII Character Codes on page 29 .
To append Then Tips
One character • In the Append Character 1 box, type the
hexadecimal ASCII code for the first character.
• In the Append Character 2 box, type $FF.
For printable characters, such as 1 or A, type the character.
Two characters In the Append Character 1 and 2 boxes, type the
hexadecimal ASCII code for each character.
Configure the User Protocol
12 Rockwell Automation Publication 1756-PM013D-EN-P - October 2014