Rockwell Automation 1761-NET-ENIW MicroLogix Ethernet Interface (ENI) User Manual - Manual (Page 56)

Publication 1761-UM006E-EN-P - August 2005
4-16 ENI/ENIW Configuration (Nodes 241 to 254)
instruction to the ENI/ENIW (or by using the ENI/ENIW Configuration
Utility).
1. Configure a 485CIF/PLC2 write message in the Allen-Bradley
controller.
2. Set the destination (target) node to 250. Using node address 250
directs this message to the TCP/IP configuration function.
3. The local integer file must be set up for at least 4 integer
locations. The first 4 words define the IP address and are
required. All remaining variables are optional.
The table below describes the TCP/IP functions that can be
configured. The sections following the table describe the functions in
more detail.
IMPORTANT
To configure TCP/IP parameters in this manner,
BOOTP and DHCP must be disabled.
Only PLC2 type or 485CIF write messages can
be used to configure the ENI/ENIW, node 250.
Table 4.4 TCP/IP Configuration Parameters
Function (1)
(1) The IP address must be configured. All other functions are optional.
Data
Type Length Notes
IP Address Integer 4 words Format aaa.bbb.ccc.ddd (decimal). The
ENI/ENIW verifies the first/highest octet of any
IP as follows:
• The first octet is between 1 and 223 and
not equal to 127.
• The first two octets are not equal to
169.254 or 169.255.
• The first octet is 0, and the entire IP is
0.0.0.0.
Otherwise the IP address is treated as an error.
For example, 0.168.0.75 is an error, or 127.0.0.0
is an error.
Subnet Mask Integer 4 words If not sent, the default mask is derived from the
class of the IP address as shown in Table 4.5.
Gateway Integer 4 words Only needed if a Gateway is present on the
Subnet. The default is 000.000.000.000.
Security Mask 1 Integer 8 words If not present, the default is no security mask
000.000.000.000.
Security Mask 2