User`s guide

2
2. EtherNet/IP
Introduction
EtherNet/IP is an Industrial Ethernet Protocol defined by the ODVA association. The protocol is open to the
public and vendors can implement EtherNet/IP into their industrial devices without incurring a license fee.
Many vendors have adopted this protocol as the standard communication protocol between devices. For
example, Rockwell Automation uses EtherNet/IP as the standard protocol for their Logix controllers over
Ethernet networks.
To allow complete integration with a Rockwell system, Moxa switches not only provide a full-functioning of
industrial network infrastructure, but also enable the SCADA system to monitor the status of the switches
as well as that of the PLCs, .making the switches part of a Rockwell system.
Messaging Types
EtherNet/IP supports two types of communication methods for EtherNet/IP devices: Explicit Messaging and
Implicit Messaging. Explicit Messaging is unscheduled and is used for a request/response communication
procedure (or client/server procedure). Explicit Messaging uses TCP/IP over Ethernet. Implicit Messaging is
scheduled and is used for a producer/consumer communication with UDP over Ethernet. Implicit Messaging
is also called I/O Messaging.
Configuring EtherNet/IP on Moxa Switches
Type 1:
Check the Enable checkbox to enable EtherNet/IP. With EtherNet/IP enabled, IGMP Snooping and IGMP
Query functions will be enabled automatically to be properly integrated in Rockwell systems for multicast
Implicit (I/O) Messaging.