Rockwell Automation 1799-DASCII DeviceNet Serial Interface - Manual (Page 12)

12 DeviceNet Serial Interface Module
Publication 1799-IN012B-EN-P - July 2008
RS-485 Mode
To operate in RS-485 mode, follow these steps.
1. Connect TRXD+ to pin 9.
2. Connect TRXD- to pin 1.
3. Connect common to pin 5.
The channel automatically operates in RS-485 mode by connecting these
pins.
Set Software Parameters
The 1799-DASCII module is configured by using the EDS parameters as defined in
the EDS Parameters table.
EDS Parameters
Parameter # Access Description Parameter Choices Default
Setting Default
Value Data
Type
Serial Port Parameters
Serial port
character
framing 1 Get/Set Defines
number of
data bits, stop
bits, and
parity in data
character
frame. 0 = 7N2
1 = 7E1
2 = 7O1
3 = 8N1
4 = 8N2 5 = 8E1
6 = 8O1
7 = 7E2
8 = 7O2 8N1 3 USINT
Serial port
comm speed 2 Get/Set Defines baud
rate of serial
port. 0 = 9600
1 = 1200
2 = 2400
3 = 4800 4 = 19.2 k
5 = 38.4 k
6 = 57.6 k
7 = 115.2 k 9600
baud 0 USINT
Serial port
handshaking 3 Get/Set Enables
RTS/CTS
hardware
handshaking
on serial port. 0 = RTS/CTS disabled
1 = RTS/CTS enabled Disabled 0 USINT