Rockwell Automation 1771-DB BASIC MODULE - Manual (Page 47)

Chapter
Using the Communication Ports 2
2 -9
Program Port
You can configure either PRT1 or DH485 as your program port.
PRT1 Configured as Program Port
If you set JW4 to one of the configurations shown at the left, PRT1 is the
program port. In this configuration, the serial port on the console device is
connected to port PRT1 on the BASIC module. The console device
communicates with the BASIC module through terminal emulation over an
RS-232 interface.
PLC processor
with BASIC module
Console device
Null modem cable
Important: When using PBASE to interface with the RS-232 port of the
BASIC module, PBASE must be configured for RS-232 communication through
the configuration and terminal selection menus. Refer to the BASIC
Development Software Programming Manual (publication number 1746-6.2).
DH485 Configured as Program Port
If you set JW4 to the configuration shown at the left, port DH485 is the
program port. In this configuration, the serial port on the personal
computer interfaces with port DH485 on the BASIC module through a
1747-PIC Interface/Converter. The 1747-PIC Interface/Converter converts
the RS-232 signals from the personal computer RS-232 serial port to
RS-485 format. When DH485 is the program port you must use PBASE to
program the BASIC module.
Personal computer
with PBASE software
1747-C10 cable
Interface/Converter RS-232 to RS-485 (1747-PIC)
PLC processor
with BASIC
module
Important: You must use PBASE to use the DH485 port as a program
port. Configure PBASE for DH-485 communication through the
configuration and terminal selection menus. Refer to the BASIC
Development Software Programming Manual (publication number
1746-6.2) for additional information.
JW4 PRT1 Program Port Configurations
(See chapter 1 for additional
information on these settings.)
JW4 DH485 Program Port Configuration