Rockwell Automation RECOMM-ENET EtherNet/IP Communications Module - Manual (Page 181)

Glossary Glossary-3
fault configuration - When communications are disrupted (for
example, a cable is disconnected), the module and SP600 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 25 (Flt Cfg Logic) through 34 (Flt Cfg D2 In). 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, Reference, and/or Datalink(s).
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 RECOMM-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.
hold last - When communications are disrupted (for example, a
cable is disconnected), the module and SP600 drive can respond
by holding last. Hold last results in the drive receiving the last data
received via the EtherNet/IP connection before the disruption. If the
drive was running and using the reference from the module, it will
continue to run at the same reference.
I/O messaging - Time-critical data such as a Logic Command and
Reference. The terms “input” and “output” are defined from the
scanner’s point of view. Output is transmitted by the scanner and
consumed by the module. Input is transmitted by the module and
consumed by the scanner.
IP addresses - A unique IP address identifies each node on an
EtherNet/IP network. An IP address consists of 32 bits that are
divided into four segments of one byte each. It appears as four
decimal integers separated by periods (xxx.xxx.xxx.xxx). Each “xxx”
can have a decimal value from 0 to 255. For example, an IP
address could be 192.168.0.1.
An IP address has two parts: a network ID and a host ID. The class
of network determines the format of the address