National Instruments FP-3000 - Manual (Page 133)

© National Instruments Corporation 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.