Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 110)

Chapter 7
Using the Serial Ports
7-2
Prior to Series A Revision E (1.30) of the firmware, all the COMM ports
on the control coprocessor and serial expander were initialized at the
factory for connection to a programming terminal. These initial settings
would process control-character sequences, pause characters, and program
abort sequences. If you have a firmware release earlier than Series A
Revision E (1.30) and you want to connect a COMM port to a device other
than a terminal, you must reconfigure the port.
The 9-pin serial port COMM 0, used for configuring the coprocessor,
retains the factory settings for connection to a programming terminal.
In Series A Revision E (1.30) of the firmware and later, however,
COMM1, COMM2, and COMM3 have all serial-port settings prepared
for raw binary data transfers. For example, the XON and XOFF settings
are set to 0xFF in order to turn of software and hardware handshaking;
this setting allows for proper RS-485 communication.
The exact changes made to the serial port settings are listed in the
following table.
Settings Prior to Series A
Revision E (1.30)
Settings in Series A
Revision E (1.30) and Later
noupc noupc
bsb nobsb
bsl nobsl
echo noecho
lf nolf
null=0 null=0
nopause nopause
pag=24 pag=0
bsp=08 bsp=00
del=18 del=00
eor=0D eor=00
eof=1B eof=00
reprint=04 reprint=00
dup=01 dup=00
psc=17 psc=00
abort=03 abort=00
quit=05 quit=00
bse=08 bse=00
bell=07 bell=00
type=00 type=00
baud=9600 baud=9600
xon=11 xon=FF
xoff=13 xoff=FF
tabc=09 tabc=00
tabs=4 tabs=0
Setting Up Communication
Parameters