Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 231)

Publication AG-UM008C-EN-P - February 2005
Configuring Logix Controllers 7-5
Line Drivers
Line drivers, also called short-haul modems, do not actually modulate
the serial data, but rather condition the electrical signals to operate
reliably over long transmission distances (up to several miles).
Allen-Bradley’s AIC+ Advanced Interface Converter is a line driver that
converts an RS-232 electrical signal into an RS-485 electrical signal,
increasing the signal transmission distance from 50 to 4000 feet. In a
point-to-point line driver topology, configure the Logix controller for
DF1 full-duplex protocol. In a point-to-multipoint line driver topology,
configure the Logix controllers for DF1 half-duplex master or slave
protocol. If these line drivers require RTS/CTS handshaking, configure
the control line parameter to Half-Duplex Modem without Continuous
Carrier.
Configuring the Controller
to Use the Serial Port To configure the serial port:
1. To bring up the Controller Properties
interface, click on the controller icon
just beneath the keyswitch icon.