Ethernet/ip network overview, Ethernet global data (egd) network overview – GE Industrial Solutions AF-300 P11_G11 Ethernet Interface User Manual

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About the OPC-G11S-ETN

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EtherNet/IP Network Overview

EtherNet/IP is an industrial networking standard that takes advantage of commercial off-the-shelf Ethernet
communication chips and physical media. IP, stands for 'industrial protocol' and is what distinguishes this

network. Unlike many options in the industrial Ethernet crowd, EtherNet/IP uses an open protocol at the
application layer. Further, more than one vendor or organization backs EtherNet/IP. It is the only standard

supported by three networking organizations: ControlNet International (CI), the Industrial Ethernet
Association (IEA) and the Open DeviceNet Vendor Association (ODVA)

For further information:

ODVA

1099 Highland Drive, Suite A

Ann Arbor, Michigan 48108

Phone: 1-734-975-8840

Fax: 1-734-922-0027

Email: [email protected]

http://www.odva.org

Ethernet Global Data (EGD) Network Overview

Ethernet Global Data (EGD) supports the ability to share information between controllers (nodes) in a
networked environment. EGD allows one controller, referred to as the producer of the data, to simultaneously

send information to any number of peer controllers (consumers) at a fixed periodic rate.

In addition, EGD supports a set of commands for accessing data and protocol information on EGD nodes.

EGD also defines a mechanism for sharing configuration information among nodes.

EGD protocol messages are categorized as command, data, or configuration messages.

Command messages can be used to monitor and control the operation of EGD on the destination node.
Data messages are individually configured to send a sample of data at a fixed periodic rate. Each data message

that a node sends or receives is associated with a specific identifier, which uniquely defines the configuration
of the data sample. This configuration is referred to as an exchange. EGD allows the configuration of

exchanges that are sent to a single destination address (IP Unicast addressing), a group of addresses (IP
Multicast addressing), or to all EGD nodes (IP Broadcast addressing). An assigned set of 32 IP Multicast

addresses has been defined for use by applications requiring the transmission of data exchanges to a group of
nodes.

EGD configuration messages are transferred using HTTP on the connection based TCP/IP transport layer,
utilizing XML as a data abstraction layer.

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