Download 20-COMM-E EtherNet/IP Adapter User Manual

Glossary
G-3
Duplex
Duplex describes the mode of communication. Full-duplex communications
let a device exchange data in both directions at the same time. Half-duplex
communications let a device exchange data only in one direction at a time.
The duplex used by the adapter depends on the type of duplex that other
network devices, such as switches, support.
E
EDS (Electronic Data Sheet) Files
Simple text files that are used by network configuration tools such as
RSNetWorx for EtherNet to describe products so that you can easily
commission them on a network. EDS files describe a product device type
and revision. EDS files for many Allen-Bradley products can be found at
http://www.ab.com/networks/eds.
EtherNet/IP Network
EtherNet/IP (Industrial Protocol) is an open producer-consumer
communication network based on the Ethernet standard (IEEE 802.3), TCP/
IP, UDP/IP, and CIP. Designed for industrial communications, both I/O and
explicit messages can be transmitted over the network. Each device is
assigned a unique IP address and transmits data on the network. The
number of devices that an EtherNet/IP network can support depends on the
class of IP address. For example, a network with a Class C IP address can
have 254 nodes.
General information about EtherNet/IP and the EtherNet/IP specification
are maintained by the Open DeviceNet Vendor’s Association (ODVA).
ODVA is online at http://www.odva.org.
Explicit Messaging
Explicit Messages are used to transfer data that does not require continuous
updates. They are typically used to configure, monitor, and diagnose
devices over the network.
F
Fault Action
A fault action determines how the adapter and connected drive act when a
communications fault (for example, a cable is disconnected) occurs or when
the controller is switched out of run mode. The former uses a
communications fault action, and the latter uses an idle fault action.
Fault Configuration
When communications are disrupted (for example, a cable is disconnected),
the adapter and PowerFlex drive can respond with a user-defined fault
configuration. The user sets the data that is sent to the drive using specific
fault configuration parameters in the adapter. When a fault action parameter
is set to use the fault configuration data and a fault occurs, the data from
these parameters is sent as the Logic Command, Reference, and/or
Datalink(s).
20-COMM-E EtherNet/IP Adapter User Manual
Publication 20COMM-UM010E-EN-P