Rockwell Automation 1203-EN1 EtherNet/IP-to-SCANport Module - Manual (Page 172)

G-4 Glossary
Flash Update
The process of updating firmware in the module. The module can be
flash updated using the Allen-Bradley software tool ControlFLASH or
the X-modem protocol and a 1203-SFC serial cable.
G
Gateway
A gateway is a device on a 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.
H
Hardware Address
Each Ethernet device has a unique hardware address (sometimes called a
MAC address) that is 48 bits. The address appears as six bytes separated
by colons (for example, xx:xx:xx:xx:xx:xx). Each byte has a value
between 0 and 255 (0x00 and 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.
HIM (Human Interface Module)
A device that can be used to configure and control an Allen-Bradley
drive.
Hold Last
When communications are disrupted (for example, a cable is
disconnected), the module and 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
Idle Action
An idle action determines how the module and connected drive act when
the controller is switched out of run mode.
I/O Data
I/O data, sometimes called “ implicit messages” or “input/output,”
transmit 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.