Rockwell Automation 1746-BAS-T SLC 500 Basic Basic-T Modules - Manual (Page 22)

Publication 1746-UM004B-EN-P - December 2005
1-10 Module and Development Software Overview
The 1747-PIC interface/converter converts the RS-232 signals from the
personal computer RS-232 serial port to RS-485 format.
Module Network Configurations
Your module may communicate with a DH485 network or it can
communicate with a remote device through a modem using the DF1
protocol. When DF1 protocol is used on PRT2, port DH485 is
disabled.
Typical communication configurations are shown in the following
figures.
• DH485 network configurations - Figure 1.7 and Figure 1.8
• DF1 protocol configuration - Figure 1.8
Figure 1.7 shows the module interfaced with a DH485 network
through a 1747-AIC isolated link coupler.
The link coupler also provides an interface to the DH485 network for
a personal computer with the BASIC Development Software.
IMPORTANT
When using the BASIC development software to
interface with port DH485 of the module, PBASE
must be configured for DH485 communication
through the configuration and terminal selection
menus. Refer to the BASIC Development Software
Programming Manual, publication 1746-PM001, for
additional information.
ATTENTION
Do not place the module on an active DH485
network until the node address and communication
rate of the module are configured. Refer to the
BASIC Language Reference Manual, publication
1746-RM001, for additional information on setting the
module node address and communication rate.