Rockwell Automation 1799-DASCII DeviceNet Serial Interface - Manual (Page 20)

20 DeviceNet Serial Interface Module
Publication 1799-IN012B-EN-P - July 2008
Serial Character Framing (parameter 1)
This defines the number of data bits and stop bits used in each character's data
frame. It also defines the type of character frame parity used.
Serial Comm Speed (parameter 2)
This defines the baud rate options available on the serial port.
RTS/CTS Hardware Handshaking (parameter 3)
With an RS232 connection, the 1799-DASCII module supports hardware
handshaking for data exchange via RTS/CTS control lines on the DB9 connectors.
When used with an ASCII device that also supports hardware handshaking, the RTS
and CTS lines are used to meter data flow between the module and device and
prevent data buffer overflow. This option can be enabled and disabled via
software.
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
hand-
shaking 3 Get/Set Enables
RTS/CTS
hardware
handshaking on
serial port. 0 = RTS/CTS disabled
1 = RTS/CTS enabled Disabled 0 USINT