Rockwell Automation 25B PowerFlex 525 Embedded EtherNet/IP Adapter User Manual
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Rockwell Automation Publication 520COM-UM001B-EN-E - March 2013
Glossary
Data Rate
The speed at which data is transferred on the EtherNet/IP network. You can set
the adapter to a data rate of 10Mbps Full-Duplex, 10Mbps Half-Duplex,
100Mbps Full-Duplex, or 100Mbps Half-Duplex. If another device on the
network sets or auto-negotiates the data rate, you can set the adapter to
automatically detect the data rate.
Datalinks
A Datalink is a type of pointer used by PowerFlex 525 drives to transfer data to
and from the controller. Datalinks allow specified parameter value(s) to be
accessed or changed without using explicit messages. When enabled, each 16-bit
Datalink in a PowerFlex 525 drive consumes 4 bytes in the input image table and/
or 4 bytes in the output image table of the controller.
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.
EDS (Electronic Data Sheet) Files
Simple text files that are used by network configuration tools 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
.
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
.
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.
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 its PowerFlex 525 drive can respond with a user-defined fault