Glossary, Numbers – National Instruments FP-3000 User Manual
Page 133
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Glossary-1
FieldPoint FP-3000 User Manual
Glossary
Prefix
Meanings
Value
m-
milli-
10
–3
M-
mega-
10
6
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.
A/D
Analog-to-digital converter.
Address
Character code that identifies a specific location (or series of
locations) in memory.
Administrative Function
An NI-FBUS function that deals with administrative tasks, such as
returning descriptors and closing descriptors.
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.