Rockwell Automation 20-COMM-E PowerFlex EtherNet/IP Adapter User Manual
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Glossary
20-COMM-E EtherNet/IP Adapter User Manual
Publication 20COMM-UM010G-EN-P
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.
D
Data Rate
The speed at which data is transferred on the EtherNet/IP network. You can
set the adapter to a data rate of 10 Mbps Full-Duplex, 10 Mbps
Half-Duplex, 100 Mbps Full-Duplex, or 100 Mbps Half-Duplex. If another
device on the network sets or auto-negotiates the data rate, you can set the
adapter to automatically detect the data rate.
Datalinks
A Datalink is a type of pointer used by PowerFlex 7-Class drives to transfer
data to and from the controller. Datalinks allow specified parameters to be
read or written to without using explicit messages. When enabled, each
Datalink consumes either four bytes or eight bytes in both the input and
output image table of the controller. The drive determines the size of
Datalinks.
DPI (Drive Peripheral Interface)
A second generation peripheral communication interface used by various
Allen-Bradley drives and power products, such as PowerFlex 7-Class
drives. It is a functional enhancement to SCANport.
DPI Peripheral
A device that provides an interface between DPI and a network or user.
Peripheral devices are also referred to as ‘adapters’ or ‘modules’. The
20-COMM-E adapter, 1203-USB or 1203-SSS converter, and PowerFlex
7-Class HIMs (catalog number 20-HIM-xxx) are examples of DPI
peripherals.
DPI Product
A device that uses the DPI communication interface to communicate with
one or more peripheral devices. For example, a motor drive such as a
PowerFlex 7-Class drive is a DPI product. In this manual, a DPI product is
also referred to as ‘drive’ or ‘host’.