Rockwell Automation 1766-Lxxxx MicroLogix 1400 Programmable Controllers User Manual - Manual (Page 373)

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 333
Connecting to Networks via Ethernet Interface Appendix G
The MicroLogix 1400 supports a maximum of 32 EtherNet/IP connections and
32 Modbus TCP connections, allowing a maximum of 32 outgoing and a
maximum of 32 incoming simultaneous connections with up to 64 other devices
or applications.. The connections are dedicated as follows:
Duplicate IP address
Detection The MicroLogix 1400 firmware supports duplicate IP address detection. In Series
B, duplicate IP address detection can be disabled in the Channel 1 configuration
in order to eliminate this source of broadcast traffic for low bandwidth
applications.
When you change the IP address or connect one of the MicroLogix to an
EtherNet/IP network, the MicroLogix 1400 controller checks to make sure that
the IP address assigned to this device does not match the address of any other
network device. The MicroLogix 1400 will check every 2 minutes for a duplicate
IP address on the network. If the MicroLogix 1400 determines that there is a
conflict (another device on the network with a matching IP address), the
following message gets posted on the LCD display.
To correct this conflict, use the instructions in this chapter to change the IP
address of the Ethernet/IP device. Then cycle power to the device or reset the
device (such as disconnecting the ethernet cable and reconnecting the cable).
There is also the possibility that two Ethernet/IP device can detect a conflict
simultaneously. If this occurs, remove the device with the incorrect IP address
or correct its conflict. To get the second device out of conflict mode, cycle
power to the module or disconnect its ethernet cable and reconnect the cable.
Number of Connections (1)
(1) Connections established by an INTERCHANGE client, RSLinx client, and peers are all included when
counting the number of connections.
Dedicated to:
16 Incoming EtherNet/IP Connections
16 (Series B only) Incoming Modbus TCP Connections
16 Outgoing EtherNet/IP Connections
16 (Series B only) OutgoingModbus TCP Connections
IMPORTANT For outgoing connections, no more that one connection per destination
node is established. If multiple MSG instructions use the same
destination node, they share the same connection.