Allen-Bradley 1756-L61 User Manual page 114

Chapter 6 Serial Communication on 1756-L6x Controllers
114
b. Specify the parameters for the protocol.
5. If you are using the User mode protocol (ASCII), click the User Protocol
tab and specify the ASCII parameters.
After you have configured the controller for ASCII protocol
communication, reference the Logix5000 Controllers General Instruction
Reference Manual, publication
instructions.
Rockwell Automation Publication 1756-UM001O-EN-P - October 2014
1756-RM003, for the available ASCII