Glossary – Rockwell Automation 1769-SM2 Compact I/O DSI/Modbus Communication Module User Manual
Page 191
Glossary
C
CIP (Common Industrial Protocol)
CIP is the transport and application layer protocol used for messaging
over EtherNet/IP, ControlNet, and DeviceNet networks. The protocol is
used for implicit messaging (real time I/O) and explicit messaging
(configuration, data collection, and diagnostics).
Class
A class is defined by the DeviceNet specification as “a set of objects that
all represent the same kind of system component. A class is a
generalization of an object. All objects in a class are identical in form
and behavior, but may contain different attribute values.”
ControlFLASH
An Allen-Bradley software tool that lets users electronically update
firmware on printed circuit boards.
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
DeviceNet Network
An open producer/consumer Controller Area Network (CAN) which
connects devices (for example, controllers, drives, and motor starters).
Both I/O and explicit messages can be transmitted over the network. A
DeviceNet network can support a maximum of 64 devices. Each device
is assigned a unique node address and transmits data on the network at
the same data rate.
A cable is used to connect devices on the network. It contains both the
signal and power wires. Devices can be connected to the network with
drop lines, in a daisy chain connection, or a combination of the two.
General information about DeviceNet and the DeviceNet specification
are maintained by the Open DeviceNet Vendor’s Association (ODVA).
ODVA
.
DSI (Drive Serial Interface)
DSI is based on the Modbus RTU serial communication protocol and is
used by various Allen-Bradley drives, such as PowerFlex 4-Class drives.