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Publication 1761-UM006A-EN-P - February 2001
7-2 Connecting 1769-L20 CompactLogix Controllers on Ethernet
The computer must include the following software:
• RSLOGIX5000, version 7.00 or later
• RSLINX, version 2.30.00 or later
• RSLOGIX500
• ENI Configuration Tool
The 1769-L20 controller must contain firmware 7.17 or later.
The Ethernet Interface Card in the computer is used to connect
directly to the SLC 5/05 controller (channel 1) and to the 5550
controller via the 1756-ENET card. The computer COMM Port is used
to connect to the 1769-L20 controller via the 1761-NET-ENI modules
and an Ethernet hub/switch.
Purpose
Provide Ethernet connectivity for 1769-L20 CompactLogix controllers
via the RS-232 serial port and the 1761-NET-ENI module.
Scope
Connecting 1769-L20 controllers on Ethernet requires one
1761-NET-ENI per L20 controller. The ENI converts RS-232 hardware
connections and DF1 full-duplex protocol to Ethernet, TCP/IP.
The ENI must be configured with IP addresses assigned to node
numbers 0 to 49. The Destination Node Address in DF1 messages is
then used by the ENI to route the message to the proper device on
Ethernet.
This application example will show how to configure the ENI module
and how to send messages from the 1769-L20 controller to the other
Controllers on Ethernet. This example will also show how to initiate
messages from the Ethernet controllers to the L20 controller. Messages
sent to the ENI module’s IP address will be delivered to the serial port
of the L20 controller.
TIP
In the ENI, node addresses 45 through 49 are
dedicated for 1756-ENET/ControlLogix controllers.
Node addresses 0 through 44 are to be used for all
other Ethernet devices, such as other 1769-L20
controllers connected to ENI modules and SLC 5/05
controllers.