Glossary – Rockwell Automation 20-750-PBUS Profibus DPV1 Option Module User Manual
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Rockwell Automation Publication 750COM-UM004B-EN-P - September 2012
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Glossary
Acyclic Messaging
Profibus DPV1 acyclic messages are used to transfer data that does not require
continuous updates. Typically the read and write services used for acyclic
messaging are used to configure, monitor, and diagnose devices over the Profibus
network.
Connected Components Workbench
software
The recommended tool for monitoring and configuring Allen-Bradley products
and network communication adapters. It can be used on computers running
various Microsoft Windows operating systems. You can obtain a free copy of
Connected Components Workbench software at
.
ControlFLASH
A free software tool used to electronically update the firmware of Allen-Bradley
products and network communication adapters. ControlFLASH software is
downloaded automatically when the firmware revision file for the product being
updated is downloaded from the Allen-Bradley updates website to your
computer.
Controller
A controller, also called programmable logic controller, is a solid-state control
system that has a user-programmable memory for storage of instructions to
implement specific functions such as I/O control, logic, timing, counting, report
generation, communication, arithmetic, and data file manipulation. A controller
consists of a central processor, input/output interface, and memory. See also
master.
Data Rate
The speed at which data is transferred on the Profibus network. The available
data rates depend on the type of cable and total cable length used on the network.
Datalinks
A Datalink is a type of pointer used by PowerFlex 750-Series drives to transfer
data to and from the controller. Datalinks allow specified parameter values to be
accessed or changed. When enabled, each 32-bit Datalink in a PowerFlex 750-
Series drive consumes 4 bytes in the input image table and/or 4 bytes in the
output image table of the controller.
DriveExplorer Software
A tool for monitoring and configuring Allen-Bradley products and network
communication adapters. It can be used on computers running various Microsoft
Windows operating systems. DriveExplorer software, version 6.xx or later, can be
used to configure this adapter and connected drive. This software tool has been
discontinued and is now available as freeware at
There are no plans to provide future updates
to this tool and the download is being provided ‘as-is’ for users that lost their
DriveExplorer CD, or need to configure legacy products not supported by
Connected Components Workbench software.
Data Rate
Maximum Cable Length
Data Rate
Maximum Cable Length
9.6 K
1000m
500 K
400m
19.2 K
1000m
1.5 M
200m
45.45 K
1000m
3 M
100m
93.75 K
1000m
6 M
100m
187.5 K
1000m
12 M
100m