Rockwell Automation 20-750-PBUS Profibus DPV1 Option Module - Manual (Page 89)

Rockwell Automation Publication 750COM-UM004B-EN-P - September 2012 89
Glossary
The Logic Status is used to monitor the PowerFlex 750-Series drive (for example,
operating state, and motor direction). It consists of one 32-bit word of input from
the option module to the network. The definitions of the bits in this word are
shown in
Appendix C .
Master-Slave Hierarchy An option module configured for a master-slave hierarchy exchanges data with
the master device. Usually, a network has one master which is the master device,
and all other devices (for example, drives with installed Profibus DPV1 option
modules) are slave devices.
On a network with multiple masters (called a multi-master hierarchy), each slave
device must have one specified master.
Master 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.
MVI56-PDPMV1 Profibus DPV1
Master
A Profibus communication module interface for ControlLogix controllers. It is
developed under license from Rockwell Automation, and incorporates
proprietary backplane technology that enables data exchange with ControlLogix
processors. More information for the MVI56-PDPMV1ControlLogix module
can be found at
http://www.prosoft-technology.com/content/view/full/8109 .
Node Address A unique address identifier for a device assigned to a Profibus network. A
Profibus network can have as many as 126 devices connected on it, where each
device on the network must have a unique node address between 0 and 126.
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 Profibus. 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-PBUS Profibus DPV1 option module connects PowerFlex 750-
Series drives to a Profibus DPV0/DPV1 network. Option modules are
sometimes also called ‘adapters’, ‘cards’, ‘embedded communication options’, or
‘peripherals’. On PowerFlex 750-Series drives, option modules can also be I/O
modules, encoder modules, safety modules, and so forth.
Ping A message that is sent by a DPI product to its peripheral devices. Pings are used to
gather data about the product, including whether it can receive messages and if
they can log in for control.
PowerFlex 750-Series (Architecture
Class) Drives
Allen-Bradley PowerFlex 750-Series drives are part of the PowerFlex 7-Class
family of drives.