Ethernet network topology – Rockwell Automation 1766-Lxxxx MicroLogix 1400 Programmable Controllers User Manual User Manual
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Rockwell Automation Publication 1766-UM001H-EN-P - May 2014
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Connecting to Networks via Ethernet Interface Appendix G
MicroLogix 1400 and PC
Connections to the
Ethernet Network
The MicroLogix 1400 Ethernet connector conforms to ISO/IEC 8802-3 STD
802.3 and utilizes 10/100Base-T media. Connections are made directly from the
MicroLogix 1400 to an Ethernet hub or switch. The network setup is simple and
cost effective. Typical network topology is pictured below.
Ethernet Network Topology
Connecting an Ethernet switch on the Ethernet Network
The MicroLogix 1400 Ethernet port supports the following Ethernet settings:
• 10 Mbps half duplex or full duplex
• 100 Mbps half duplex or full duplex
Mode selection can be automatic, based on the IEEE 802.3 auto negotiation
protocol. In most cases, using the auto negotiation function results in proper
operation between a switch port and MicroLogix 1400 Ethernet port.
With RSLogix500/RSLogix Micro programming software version 8.10.00 or
later, you can manually set the communication rate and duplex mode of an
Ethernet port you have connected to the switch port. The settings of the
Ethernet port and the switch port must match.
Optimal Performance: MicroLogix 1400 to MicroLogix 1400 controller
Operation
Words
MSG per Second
Words per Second
Single Typed Read
1
20
20
Single Typed Reads
20
20
400
Single Typed Reads
100
20
2,000
IMPORTANT
The MicroLogix 1400 controller contains a 10/100Base-T, RJ45
Ethernet connector which connects to standard Ethernet hubs or
switchs via 8-wire twisted-pair straight-through cable. To access other
Ethernet mediums, use 10/100Base-T media converters or Ethernet
hubs or switchs that can be connected together via fiber, thin-wire, or
thick-wire coaxial cables, or any other physical media commercially
available with Ethernet hubs or switchs.
to PC Ethernet Card
to MicroLogix 1400
Channel 1
RJ45 connectors on both ends
of cable (10/100Base-T)
Ethernet Hub or
Switch