Rockwell-automation 1788-FFCT NI-FBUS Configurator User Manual Manual de usuario descargar pdf (Pagina 77)

1 Publication 1788-UM052B-EN-P - April 2002

Glossary

We use these abbreviations, acronmys, and initialisms throughout the

document.

Term Definition

AI Analog Input

AO Analog Output

basic device a device that can communicate on the fieldbus, but cannot

become the LAS

BG Bias Gain

block A logical software unit that makes up one named copy of a block

and the associated parameters its block type specifies. The values

of the parameters persist from one invocation of the block to the

next. It can be a resource block, transducer block, or function block

residing within a VFD.

block tag a character string name that uniquely identifies a block on a

fieldbus network

bridge an interface in a fieldbus network between two different

protocols

contained parameter a parameter that does not receive or send data, and is contained

within a function block

control loop a set of connections between blocks used to perform a control

algorithm

control strategy see function block application

CS Control Selector

DCS Distributed Control System

DD Device Description

deterministic communication in which data is transferred between a given set

communication devices at the same time during each loop

device ID An identifier for a device that the manufacturer assigns. Device

IDs must be unique to the device; no two devices can have the

same device ID.

device tag a name you assign to a fieldbus device

DI Discrete Input

DO Discrete Output

FBAP see function block application

fieldbus an all-digital, two-way communication system that connects

control systems to instrumentation

Fieldbus Foundation the organization that developed a fieldbus network specifically

based upon the work and principles of the ISA/IEC standards

committees

OUNDATION Fieldbus the communications network that the Fieldbus Foundation created

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Rockwell-automation 1788-FFCT NI-FBUS Configurator User Manual Manual de usuario Pagina 77