Rockwell Automation 22-COMM-D DeviceNet Adapter - Manual (Page 131)

Glossary-7
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 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
RSNetWorx for DeviceNet software is a 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.
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 adapters connected to a network. See also
Controller.
Status Indicators
Status indicators are LEDs that are used to report the status of the
adapter, network, and drive. They are on the adapter and can be viewed
on the front cover of the drive when the drive is powered.
T
Type 0/Type 1/Type 2 Control
When transmitting I/O, the adapter can use different types of messages
for control. The Type 0, Type 1, and Type 2 events help Allen-Bradley
personnel identify the type of messages that an adapter is using.