Rockwell Automation 25-COMM-P PowerFlex PROFIBUS DPV1 Adapter User Manual
Page 87
Rockwell Automation Publication 520COM-UM004A-EN-E - November 2013
87
Glossary
I/O Data
I/O data, sometimes called “implicit messages” or “input/output,” is time-critical
data such as a Logic Command and Reference. The terms “input” (To Net) and
“output” (From Net) are defined from the controller’s point of view. Output is
produced by the controller and consumed by the adapter. Input is produced by
the adapter and consumed by the controller.
Logic Command/Logic Status
The Logic Command is used to control the PowerFlex 520-series drive (for
example, start, stop, direction). It consists of one 16-bit word of output to the
adapter from the network. The definitions of the bits in this word are shown in
Logic Command/Status Words: PowerFlex 520-Series Drives on page 81
.
The Logic Status is used to monitor the PowerFlex 520-series drive (for example,
operating state, motor direction). It consists of one 16-bit word of input from the
adapter to the network. The definitions of the bits in this word are shown in
Logic Command/Status Words: PowerFlex 520-Series Drives on page 81
.
Master-Slave Hierarchy
An adapter 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 connected to PROFIBUS DPV1 adapters)
are slave devices.
On a network with multiple masters (called a multi-master hierarchy), each slave
device must have one specified master.
MVI69-PDPMV1 PROFIBUS
DPV1 Master
A Profibus communication module interface for CompactLogix controllers. It is
developed under license from Rockwell Automation, and incorporates
proprietary backplane technology that enables data exchange with
CompactLogix processors. More information for the MVI69-
PDPMV1CompactLogix module can be found at
.
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 1 and 126.
NVS (Non-Volatile Storage)
NVS is the permanent memory of a device. Devices such as the adapter 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.”
PowerFlex 523 Drives
The Allen-Bradley PowerFlex 523 drives are part of the PowerFlex 520-series of
drives.
PowerFlex 525 Drives
The Allen-Bradley PowerFlex 525 drives are part of the PowerFlex 520-series of
drives.