Numatics G3 Series - Glossary of Terms

G3 Series EtherNet/IP
TM
DLR Technical Manual
16-162
TDG3EDM1-6EN 3/18
Subject to change without notice
www.asco.com/g3
16.4 Glossary of Terms
The following is a list and description of common terms and symbols used throughout this document:
Term
Description
Address
Resolution
Protocol (ARP)
A protocol used to set an IP address using a MAC Address hardware address. This can be done in the
command prompt window.
Bit
Smallest unit of digital information either a “0” or “1”
Bit Mapping
Chart showing which bit is connected to which physical input or output point.
Bootstrap
Protocol (BOOTP)
A protocol used to set an IP Address, Subnet Mask, and Gateway using a server.
Broadcast
A transmission method that sends packets to multiple unspecified devices.
Byte
8 bits (1/2 word)
Comm. Fault
One or more of the I/O connections have timed out.
DLR
Device Level Ring
Discrete I / O
The inputs / outputs that are available via the “Discrete I/O” side of manifold.
Dynamic Host
Configuration
Protocol (DHCP)
A protocol used by a node to obtain an IP Address, Subnet Mask, and Gateway Address from a server.
EDS File
Electronic Data Sheet. A text file, which contains specific product information, definitions of product
capabilities and configurable parameters necessary for operation on an EtherNet/IP
TM
network.
Explicit
Messaging
Messaging that sends data to perform request/response functions.
Ground
This term is used to indicate an earth or chassis ground.
I/O
Any combination of inputs and outputs
Idle
A zero (0) length poll message (i.e.: scanner in program mode)
IGMP Snooping
See Implicit Messaging
Implicit
Messaging
A function that that can control I/O messaging to another I/O device.
Internet Group
Management
Protocol (IGMP)
A protocol used to keep local switches informed in a multicast group. Nodes that leave the group will no
longer be sent packets of information from switches and routers.
Layer 2
(data link layer
or level)
The data layer that physically refers to the frame format and addressing. A layer 2 address is an Ethernet
address.
Layer 3
(network layer or
level)
The data layer that refers to IP and the IP packet format. A layer 3 address is an IP address.
Link
A group of nodes with different MAC addresses. Segments connected by repeaters make a link. Links that
are connected by routers make up a network.
MAC Address
Media Access Connection Address
Multicast
A transmission where a packet is sent to all possible nodes of a certain subset.