Rockwell Automation 1771-DB BASIC MODULE - Manual (Page 48)

Chapter
Using the Communication Ports 2
2 -10
DF1 Protocol
If you set JW4 to the configuration shown at the left, PRT2 port can be
configured via a BASIC program for DF1 protocol. The BASIC module
uses DF1 protocol to communicate with external devices using, for
example, a leased phone line, radio link or dial-up modem.
Important: When DF1 protocol is selected on port PRT2, DH-485
communications are disabled.
PLC
processor
with BASIC
module
Modem
Modem
1747-C11 cable
Link
Coupler
1747-AIC
Link
coupler
1747-AIC
Console device
DH-485
communication
cable
Belden #9842
Interface/Converter
RS-232 to RS-485
(1747-PIC)
1747-C13 cable
PLC
processor
with BASIC
module
SLC 500
controller
with
1747-KE
module
1747-C10 cable
Important: The 1747-C13 cable acts only as a communication link and
does not carry 24V dc power. The 1747-C10, 1747-C11, 1747-C20 cable
carries 24V dc power from the processor to the link coupler.
(The 1747-C10 cable, 1747-C11 and 1747-C20 cables are
interchangeable.)
Important: If the modems are dial-up, the BASIC program may initiate
dial-up and then switch port PRT2 to DF1 protocol when connection is
made to the 1747-KE or 1770-KF3 DH-485 Communication Interface
Module. JW4 must still be set for DF1 protocol; however, the port is not
active until you enable it with CALL 108 (page 13 -38).
JW4 DF1 Protocol Configuration