Rockwell Automation 1761-NET-ENIW MicroLogix Ethernet Interface (ENI) User Manual - Manual (Page 54)

Publication 1761-UM006E-EN-P - August 2005
4-14 ENI/ENIW Configuration (Nodes 241 to 254)
Node 253 - Baud Rate
The first time the ENI/ENIW is powered-up (out-of-the-box), it is set
to Autobaud so that it can synchronize to the attached controller. The
baud rate can be changed by sending a message to address 253 with
one of the configuration values shown in the table below. Changes to
the baud rate take effect when the ENI/ENIW power is cycled or
when a Save configuration to flash command (write to node 248) is
received. The ENI/ENIW also performs a CRC/BCC check when
autobaud is operational.
When Autobaud is selected in an ENI/ENIW series B or higher, the
ENI/ENIW communicates with the DF1 device attached to it at each
power up to determine whether or not the ENI/ENIW should be in
‘CompactLogix Routing’ mode, and to set the baud rate and
checksum.
Table 4.2 ENI/ENIW Baud Rate Options
Baud Rate Configuration Value
For CRC with CompactLogix
Routing Disabled
(Series A and higher) For CRC with CompactLogix
Routing Enabled
(Series B and higher)
Autobaud 0 100
1200 1 101
2400 2 102
4800 3 103
9600 4 104
19.2K 5 105
38.4K
(1)
(1) All CompactLogix devices must be configured to use two stop bits when communicating with the ENI/ENIW
series A and B at 38.4K.
6 106
57.6K
(2)
(2) 38.4K is the maximum serial port speed for Allen-Bradley controllers. The 57.6K setting may only be used with
RSLinx.
7 107
Autobaud
Enabled Autodetect of CRC/BCC occurs when autobaud is selected using values 8
to 99 and 108 to 65535.
IMPORTANT
If the controller’s baud rate is from 1200 to 38.4K,
and the ENI/ENIW is configured for Autobaud, the
ENI/ENIW will synchronize with the controller’s
baud rate. The ENI/ENIW cannot Autobaud to 57.6K
to synchronize to the attached controller. You must
manually set the baud rate to 57.6K.