GE Industrial Solutions AF-300 P11_G11 Ethernet Interface - Manual (Page 8)

About the OPC-G11S-ETN 2
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.