Rockwell Automation 1763 MicroLogix 1100 Programmable Controllers User Manual - Manual (Page 202)

Publication 1763-UM001D-EN-P - March 2011
200 Connecting to Networks via RS-232/RS-485 Interface
The MicroLogix™ controller supports the DF1 Full-Duplex protocol via
RS-232 connection to external devices, such as computers, or other controllers
that support DF1 Full-Duplex.
DF1 is an open protocol. Refer to DF1 Protocol and Command Set Reference
Manual, publication 1770-6.5.16, for more information.
DF1 Full-Duplex protocol (also referred to as DF1 point-to-point protocol) is
useful where RS-232 point-to-point communication is required. DF1 protocol
controls message flow, detects and signals errors, and retries if errors are
detected.
Example DF1 Full-Duplex Connections
For information about required network connecting equipment, see Chapter 4 ,
Communication Connections .
Personal Computer
Modem cable
Modem
Modem
CH0
1761-CBL-PM02
MicroLogix 1100
Personal Computer
MicroLogix 1100
CH0
1761-CBL-PM02
Null modem
adapter Null modem
adapter Null modem
adapter