Glossary, Numbers – National Instruments NI-FBUS User Manual
Page 137
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G-1
NI-FBUS Configurator User Manual
Glossary
Symbol
Prefix
Value
m
milli
10
-3
k
kilo
10
3
Numbers
4-20 mA system
Traditional control system in which a computer or control unit
provides control for a network of devices controlled by 4-20 mA
signals.
A
A
Amperes.
Actuator
A device that translates electrical signals into mechanical actions.
Acyclic communication
Unscheduled communication on the bus.
Address
Character code that identifies a specific location (or series of
locations) in memory.
AI
Analog Input.
Alarm
A notification the NI-FBUS Communications Manager software
sends when it detects that a block leaves or returns to a particular
state.
Alarm condition
A notification that a Fieldbus device sends to another Fieldbus device
or interface when it leaves or returns to a particular state.
Alert
An alarm or event.
Analog
A description of a continuously variable signal or a circuit or device
designed to handle such signals.
AO
Analog Output.
API