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Publication 1761-UM006A-EN-P - February 2001
7-6 Connecting 1769-L20 CompactLogix Controllers on Ethernet
Then, connect the serial cable between your computer and ENI #1
and click on the ENI IP Addr tab. From this tab, under the “Save To”
column, click the ENI ROM button. This will download your
configuration parameters to ENI #1 and save it to non-volatile
memory.
Configuring 1761-NET-ENI
#2
ENI #2 is connected to the L20 controller. This ENI must be configured
with its own IP address (131.200.50.94 for this example) and we must
add the IP addresses of the SLC 5/05 controller and the
1756-ENET/5550 controller to its Message Routing table. The Message
Routing table allows for up to 50 IP addresses to be linked to DF1
destination node addresses, for the following purposes:
At this point we could merely configure ENI #2 as we did ENI #1. Or,
we could use the method outlined in Chapter 5 to configure ENI #2.
This method sends configuration Messages from the L20 controller via
the DF1 link. If for any reason this ENI would need to be replaced, it
could then be easily and quickly configured via messages from the
L20 controller. A ladder program to accomplish this is as follows:
Table 7.2 Message Routing
Nodes Function
Nodes 0 to 44 When sending messages to any Ethernet device, other than
ControlLogix, that supports the same command set as the 1769-L20
controller, i.e. SLC 5/05, PLC-5E and other ENI modules. We will
use the PLC-5 Typed Write commands for this example. CIP
commands are not supported by the ENI.
Nodes 45 to 49 When sending messages to a 1756-ENET/ControlLogix Controller,
the controller MUST be in slot 0 of the ControlLogix chassis for the
message to be delivered to it.