Rockwell Automation 1757-FFLD Linking Device Configuration Manual - Manual (Page 143)

1 Publication 1757-PM002A-EN-E - June 2006
Glossary
We use these words and acronyms throughout the document.
Term Definition
Application Layer A layer in the communication stack containing the object dictionary.
Automation
System A process automation, control, and diagnostic system that is composed of distinct
modules. These modules may be physically and functionally distributed over the plant
area. The automation system contains all the modules and associated software
required to accomplish the regulatory control and monitoring of a process plant. This
definition of automation system excludes field instruments, remote terminal units,
auxiliary systems and management information systems.
Auto Sense Capability by the system to automatically detect and recognize any hardware upon
addition to, or removal from, the system without any user intervention.
Basic Device A device that can communicate on the fieldbus, but cannot become the LAS.
Block See function block.
Block Tag A character string name that uniquely identifies a block on a fieldbus network.
Brick Fully connected passive junction located on the bus.
Bridge An interface in a fieldbus network that interconnects two or more H1 networks.
Bus An H1 fieldbus cable between a host and field devices connected to multiple segments,
sometimes through the use of repeaters.
Capabilities File Describes the communication objects in a fieldbus device. A configuration device can
use Device Description (DD) Files and Capabilities Files to configure a fieldbus system
without having the fieldbus devices online.
Common File
Format File (CFF) A software file used by the host to know the device detailed FF capabilities without
requiring the actual device. This file format is used for Capabilities and Value files.
Communications
Stack Layered software supporting communication between devices. A Communications
Stack is device communications software, which provides encoding and decoding of
User Layer messages, deterministic control of message transmission, and message
transfer.
Configurable The capability to select and connect standard hardware modules to create a system; or
the capability to change functionality or sizing of software functions by changing
parameters without having to modify or regenerate software.
Configuration The physical installation of hardware modules to satisfy system requirements; or the
selection of software options to satisfy system requirements.
Connector A Connector is a coupling device used to connect the wire medium to a fieldbus device
or to another segment of wire.
Contained
Parameter An internal parameter that cannot be linked to other function blocks or devices (i.e., it
does not have a pin).
Control Loop A set of connections between blocks used to perform a control algorithm.
Control Strategy See function block.
Coupler A physical interface between a trunk and spur, or a trunk and a device.
Cycle The scanning of inputs, execution of algorithms and transmission of output values to
devices.