Rockwell Automation MD65 EtherNet/IP Communication Module - Manual (Page 168)

Glossary-2 EtherNet/IP Communications Module
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.
fault configuration - When communications are disrupted (for
example, a cable is disconnected), the module and MD65 drive can
respond with a user-defined fault configuration. The user sets the
data that is sent to the drive in the fault configuration parameters
(parameters 20 (Flt Cfg Logic) through 21 (Flt Cfg Ref). When a
fault action parameter is set to use the fault configuration and a fault
occurs, the data from these parameters is sent as the Command
Logic and/or Reference.
flash update - The process of updating firmware in the module.
The module can be flash updated using the ControlFLASH tool or
the X-Modem protocol and a MDCOMM-232 serial converter.
gateway - A device on the network that connects an individual
network to a system of networks. When a node needs to
communicate with a node on another network, a gateway transfers
the data between the two networks. You need to configure the
address for the gateway device in the module if you want the
module to communicate with devices that are not on its network.
hardware address - Each Ethernet device has a unique hardware
address (sometimes called an MAC address) that is 48 bits. The
address appears as six digits separated by colons (for example,
xx:xx:xx:xx:xx:xx). Each digit has a value between 0 and 255 (0x00
to 0xFF). This address is assigned in the hardware and cannot be
changed. It is required to identify the device if you are using a
BOOTP utility.