Rockwell Automation 25-COMM-D PowerFlex 525 DeviceNet Adapter User Manual
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Rockwell Automation Publication 520COM-UM002A-EN-E - April 2013
Glossary
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
Class
A class is defined by the DeviceNet specification as ‘a set of objects that all
represent the same kind of system component. A class is a generalization of an
object. All objects in a class are identical in form and behavior, but may contain
different attribute values.’
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
Scanner.
Cyclic I/O Data Exchange
A device configured for Cyclic I/O data exchange transmits data at a user-
configured interval. This type of exchange ensures that data is updated at an
appropriate rate for the application and allows data to be sampled at precise
intervals for better determinism.
Data Rate
The speed at which data is transferred on the DeviceNet network. The available
data rates depend on the type of cable and total cable length used on the network.
Each device on a DeviceNet network must be set for the same data rate. You can
set the DeviceNet adapter to 125 Kbps, 250 Kbps or 500 Kbps. Or you can set it
to Autobaud if another device on the network has set the data rate.
Cable
Maximum Cable Length
125 Kbps
250 Kbps
500 Kbps
Thick Trunk Line
500 m (1,640 ft)
250 m (820 ft)
100 m (328 ft)
Thin Trunk Line
100 m (328 ft)
100 m (328 ft)
100 m (328 ft)
Maximum Drop Length
6 m (20 ft)
6 m (20 ft)
6 m (20 ft)
Cumulative Drop Length
156 m (512 ft)
78 m (256 ft)
39 m (128 ft)