Rockwell Automation RECOMM-ENET EtherNet/IP Communications Module - Manual (Page 180)

Glossary-2 EtherNet/IP Communications Module
DPI (Drive Peripheral Interface) - A peripheral communication
interface used by various Reliance Electric drives and power
products.
DPI peripheral - A device that provides an interface between DPI
and a network or user. Peripheral devices are also referred to as
“modules” and “adapters.” The EtherNet/IP module and SP600 OIM
are examples of DPI peripherals.
DPI product - A device that uses the DPI communications interface
to communicate with one or more peripheral devices. For example,
a motor drive such as a SP600 drive is a DPI product. In this
manual, a DPI product is also referred to as “product” or “host.”
duplex - Communications mode. Full-duplex communications
refers to the transmission of data in two directions simultaneously
(as in a telephone). Half-duplex communications refers to the
transmission of data in one direction at a time (as in a walkie-talkie).
The duplex mode used by the module depends on the mode that
other network devices, such as switches, support.
Electronic Data Sheet (EDS) files - Simple text files that are used
by network configuration tools such as RSNetWorx for EtherNet/IP
to describe products so that you can easily commission them on a
network. EDS files describe a product device type, revision, and
configurable parameters.
EtherNet/IP network - 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 - Used to transfer data that does not require
continuous updates. It is typically used to configure or monitor a
device’s parameters on the network.
fault action - Determines how the module and connected product
act when a communications fault occurs (for example, a cable is
disconnected) or when the scanner is switched out of run mode.
The former uses a communications fault action, and the latter uses
an idle fault action.