National-instruments FP-3000 Manual de usuario Pagina 138

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Glossary
FieldPoint FP-3000 User Manual Glossary-6 www.ni.com
Link AF
OUNDATION
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 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.
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
See control loop.
M
Macrocycle The least common multiple of all the loop times on a given link, or
one iteration of a the process control loop.
Menu An area accessible from the command bar that displays a subset of the
possible command choices. In the NI-FBUS Configurator, refers to
menus defined by the manufacturer for a given block.
Method Methods describe operating procedures to guide a user through a
sequence of actions.
mm millimeter.
Mode Type of communication.
N
Network address The Fieldbus network address of a device.
Nifb.exe The NIFB process that must be running in the background for you to
use your AT-FBUS or PCMCIA-FBUS interface to communicate
between the board and the Fieldbus.
NI-FBUS API The NI-FBUS Communications Manager.
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