Rockwell Automation RECOMM-DNET DeviceNet Adapter for use with DPI AC Drives - Manual (Page 161)

Glossary Glossary-5
operator interface module (OIM) - A device that can be used to
configure and control a SP600 drive.
programmable controller communications command (PCCC) -
The protocol used by some controllers to communicate with devices
on a network. Some software products (for example, VS Utilities)
also use PCCC to communicate.
peer-to-peer hierarchy - An adapter that is configured for a peer-
to-peer hierarchy can exchange data with a device on the network
that is not a scanner. This type of hierarchy can be set up so that a
scanner configures or transmits data to one SP600 drive which then
sends the same configuration or data to other SP600 drives on the
network. To use a peer-to-peer hierarchy, you configure one adapter
to transmit data (2 – 4 words) and one or more adapters to receive
the data.
ping - A message that is sent by a DPI product to its peripheral
devices. They use the ping to gather data about the product,
including whether it can receive messages and whether they can
log in for control.
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 adapter receives a Logic
Status Command from the scanner and then sends the Logic Status
of the connected SP600 drive.
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.
reference/feedback - The reference is used to send a reference
(for example, speed, frequency, torque) to the product. It consists of
one word of input to the adapter from the network. The size of the
word (either a 16-bit word or 32-bit word) is determined by the drive.
Feedback is used to monitor the speed of a product. It consists of
one word of output from the adapter to the network. The size of the
word (either a 16-bit word or 32-bit word) is determined by the drive.
RSNetWorx for DeviceNet - A software tool for configuring and
monitoring DeviceNet networks and connected devices. It is a 32-bit
Windows application that runs on Windows 95, Windows 98, and
Windows NT. Information about RSNetWorx for DeviceNet software
can be found at http://www.software.rockwell.com/rsnetworx.