Rockwell Automation 20-750-ENETR PowerFlexDual-Port EtherNet/IP Option Module - Manual (Page 193)

Rockwell Automation Publication 750COM-UM008A-EN-P - July 2012 193
Glossary
NVS (Nonvolatile Storage) NVS is the permanent memory of a device. Devices such as the option module
and drive store parameters and other information in NVS so that they are not lost
when the device loses power. NVS is sometimes called “EEPROM.”
Option Module Devices such as drives, controllers, and computers usually require a network
communication option module to provide a communication interface between
them and a network such as EtherNet/IP. An option module reads data on the
network and transmits it to the connected device. It also reads data in the device
and transmits it to the network.
The 20-750-ENETR Dual-port EtherNet/IP option module connects
PowerFlex 750-Series drives to an EtherNet/IP network. Option modules are
sometimes also called “adapters,” “cards,” “embedded communication options,”
and “peripherals.” On PowerFlex 750-Series drives, option modules can also be
I/O modules, encoder modules, safety modules, and so forth.
PCCC (Programmable Controller
Communications Command)
PCCC is the protocol used by some controllers to communicate with devices on
a network. Some software products (for example, DriveExplorer software and
DriveExecutive software) also use PCCC to communicate.
Peer-to-Peer Hierarchy An option module that is configured for a peer-to-peer hierarchy can exchange
data with a device on the network that is not a scanner. This type of hierarchy can
be set up so that a scanner configures or transmits data to one PowerFlex 750-
Series drive which then sends the same configuration or data to other PowerFlex
750-Series drives on the network. To use a peer-to-peer hierarchy, you configure
one option module to transmit data and one or more option modules to receive
the data.
Ping A message that is sent on the network to determine if a node exists.
PowerFlex 750-Series (Architecture
Class) Drives
Allen-Bradley PowerFlex 750-Series drives are part of the PowerFlex 7-Class
family of drives.
Reference/Feedback The Reference is used to send a setpoint (for example, speed, frequency, torque)
to the drive. It consists of one 32-bit word of output to the option module from
the network.
Feedback is used to monitor the speed of the drive. It consists of one 32-bit word
of input from the option module to the network.
RSLogix 5000 software RSLogix 5000 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 .
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
Option Modules connected to a network. See also Controller.
SI (Serial Interface) A next generation communication interface used by various Allen-Bradley drives,
such as PowerFlex 750-Series drives.