Rockwell Automation RECOMM-CNET ControlNet Communications Module - Manual (Page 153)

Glossary Glossary-1
G
LOSSARY
CAN (Controller Area Network) - A serial bus protocol on which
DPI is based.
ControlNet - An open producer/consumer communication network,
with features such as redundant media and deterministic I/O timing,
designed for high-performance or time-critical requirements.
controller - Also called programmable logic controller. 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.
data rate - The data rate is the speed at which data is transferred
on the ControlNet network (fixed at 5 Mbps).
Datalink - A type of pointer used by some SP600 drives to transfer
data to and from the controller. Datalinks allow specified parameter
value(s) to be accessed or changed 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 peripheral communication
interface used by various Reliance Electric drives and power
products.
DPI peripheral - A device that provides an interface between DPI
and a network or user. Peripheral devices are also referred to as
“modules” and “adapters.” The ControlNet module and SP600 OIM
are examples of DPI peripherals.
DPI product - A device that uses the DPI communications interface
to communicate with one or more peripheral devices. For example,
a motor drive such as a SP600 drive is a DPI product. In this
manual, a DPI product is also referred to as “product” or “host.”
Electronic Data Sheet (EDS) files - Simple text files that are used
by network configuration tools such as RSNetWorx for ControlNet to
describe products so that you can easily commission them on a
network. EDS files describe a product device type, revision, and
configurable parameters.