G-6
Glossary
PowerFlex 750-Series Drive DeviceNet Option Module User Manual
Publication 750COM-UM002A-EN-P
Polled I/O Data Exchange
A device that is configured for polling I/O data exchange sends data
immediately after it receives a request for the data. For example, an
Option Module receives a Logic Command from the scanner and then
sends back the Logic Status of the connected PowerFlex drive.
PowerFlex 750-Series (Architecture Class) Drives
Allen-Bradley PowerFlex 750-Series drives are part of the PowerFlex
7-Class family of drives.
Producer/Consumer Network
On producer/consumer networks, packets are identified by content
rather than an explicit destination. If a node needs the packet, it will
accept the identifier and consume the packet. The source therefore
sends a packet once and all the nodes consume the same packet if they
need it. Data is produced once, regardless of the number of consumers.
Also, better synchronization than Master-Slave networks is possible
because data arrives at each node at the same time
R
Reference/Feedback
The Reference is used to send a setpoint (for example, speed or
frequency) to the drive. It consists of one 32-bit REAL (floating point)
piece of output control data from the network to the Option Module.
Feedback is used to monitor the speed of the drive. It consists of one
32-bit REAL (floating point) piece of input control data from the
Option Module to the network.
RSLogix 5000
RSLogix 5000 software is a tool for configuring and monitoring
controllers to communicate with connected devices. It is an application
that runs on various Windows operating systems. Information about
RSLogix software can be found at
http://www.software.rockwell.com/
.
S
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.
Status Indicators
Status indicators are LEDs that are used to report the status of the
Option Module, network, and drive. They are on the Option Module and
can be viewed when the drive is powered and its cover is removed.
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