Rockwell Automation 1329I DeviceNet Option FRN 1.XXX - Manual (Page 85)

Glossary
Numeric 1329I Integrated/Drive Motor
The 1329I Integrated Drive Motor is an AC drive integrally mounted with
an inverter duty motor. It consists of a drive section and a motor section. It
may be connected to a DeviceNet network with an DeviceNet option. In this
manual, the 1329I Integrated Drive Motor is also referred to as “1329I unit,”
“drive,” or “unit.”
A Assembly Objects
The DeviceNet Specification defines Assembly Objects as objects that
“bind attributes of multiple objects to allow data to or from each object to be
sent over a single connection.” The 1329I unit with a DeviceNet option uses
assembly objects to transmit data to and from a scanner over a control I/O
connection. The terms “input” and “output” are defined from the scanner’s
point of view. Output assemblies are sent by the scanner and consumed by
the unit. Input assemblies are sent by the unit and consumed by the scanner.
B Bus Off
A bus off condition occurs when an abnormal rate of errors is detected on
the Control Area Network (CAN) bus in a device. The bus-off device cannot
receive or transmit messages on the network. This condition is often caused
by corruption of the network data signals due to noise or data rate mismatch.
C Change of State (COS) I/O Data Exchange
A device that is configured for change of state I/O data exchange transmits
data at a specified interval if its data remains unchanged. If its data changes,
the device immediately transmits the change. This type of exchange can
reduce network traffic and save resources since old data does not need to be
transmitted or processed.
Classes
A device has many objects. Each type of object is grouped in a class that is
identified with a unique ID number.
Controller
A controller, also called programmable logic controller and processor, 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.
Cyclic I/O Data Exchange
A device configured for cyclic I/O data exchange transmits data at a
user-configured rate. This type of exchange ensures that data is updated at
an appropriate rate for the application, preserves bandwidth for
rapidly-changing devices, and allows data to be sampled at precise intervals
for better determinism.