Rockwell Automation 2100-ENET CENTERLINE 2100 Motor Control Centers EtherNet/IP Network Adapter - Manual (Page 66)

66 Rockwell Automation Publication 2100-UM006A-EN-P - July 2013
Glossary
N
Nonvolatile Storage (NVS) NVS is the permanent memory of a device. Devices such as the adapter and E3
Plus module store parameters and other information in NVS so that they are not
lost when the device loses power. NVS is sometimes called EEPROM.
P
Ping A message that is sent by one end device to its peripheral devices. They use the
ping to gather data about the product, including whether it can receive messages
and whether they can log in for control. On an EtherNet/IP network, a ping can
be used to determine if a node exists.
R
RSLogix 5, RSLogix 500, and
RSLogix 5000 Software
RSLogix software is a tool for configuring and monitoring controllers to
communicate with connected devices. It is a 32-bit application that runs on
various Windows operating systems. Information about RSLogix software can be
found at
http://www.software.rockwell.com/rslogix .
S
Scanner A scanner is a separate module (of a multi-module controller) or a built-in
component (of a single-module controller) that provides communication with
adapters connected to a network. See also Controller.
Status Indicators Status indicators are LEDs that are used to report the status of the adapter,
network, and end device. They are on the front face of the adapter.
Subnet Mask An extension to the IP addressing scheme that lets you use a single network ID
for multiple physical networks. A bit mask identifies the part of the address that
specifies the network and the part of the address that specifies the unique node
on the network. A ‘1’ in the subnet mask indicates the bit is used to specify the
network. A ‘0’ in the subnet mask indicates that the bit is used to specify the
node.
For example, a subnet mask on a network can appear as follows: 11111111
11111111 11111111 11000000 (255.255.255.192). This mask indicates that 26
bits are used to identify the network and 6 bits are used to identify devices on
each network. Instead of a single physical Class C network with 254 devices, this
subnet mask divides it into four networks with up to 62 devices each.
Switches Network devices that provide virtual connections that help to control collisions
and reduce traffic on the network. They are able to reduce network congestion by
transmitting packets to an individual port only if they are destined for the
connected device. In a control application, in which real time data access is
critical, network switches can be required in place of hubs.