Linkage – National Instruments NI-FBUS User Manual
Page 142
Glossary
NI-FBUS Configurator User Manual
G-6
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ISO
International Organization for Standardization. A technical standards
organization that creates international technical standards for
computers and communications. The ISO is composed of national
standards organizations in 89 countries. The American National
Standards Institute (ANSI) represents the United States in the ISO.
Isolation
A type of signal conditioning in which you isolate the transducer
signals from the computer for safety purposes. This protects you and
your computer from large voltage spikes and makes sure the
measurements from the devices are not affected by differences in
ground potentials.
L
LAS
Link
A Foundation Fieldbus network is made up of devices connected by
a serial bus. This serial bus is called a link (also known as a segment).
Link Active Schedule
A schedule of times in the macrocycle when devices must publish
their output values on the Fieldbus.
Link Active Scheduler
The Fieldbus device that is currently controlling access to the
Fieldbus. A device that is responsible for keeping a link operational.
The LAS executes the link schedule, circulates tokens, distributes
time, and probes for new devices.
Link master device
A device that is capable of becoming the LAS.
Linkage
A connection between function blocks.
Linkage object
An object resident in a device that defines connections between
function block input and output across the network. Linkage objects
also specify trending connections.
LM
Link Master.
Lookout
National Instruments Lookout is a full-featured object-based
automation software system that delivers unparalleled power and
ease of use in demanding industrial measurement and automation
applications.
Loop
.