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ePAQ-9150
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Flash
Format
Freeze
Full-Duplex
Group Address
Half-Duplex
Hardware
Hardwired
Hexadecimal
Hysteresis
Interface
Interrupt
I/O
LED
Limits
Link
Lower Limit
Lower Limit Return
LSB
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device, or program operation.
A type of non-volatile computer memory that can be electrically erased
and reprogrammed such as in an EEPROM. It usually contains the
computer program instructions needed for proper operation.
The specification for a transmitted or received message word, or for the
internal organization of data.
To maintain an input value, such as that from a pulse accumulator, at its
present magnitude, regardless of subsequent changes in the input.
Traffic on a communication channel in which transmission is simultaneous
in both directions as in a 4-wire circuit.
A number assigned to a block of local or remote supervisory status points.
Traffic on a two-wire communication channel in which transmission is only
in one direction at a time.
Any physical equipment, as opposed to documentation or software.
A connection made with a physical wire, as opposed to switching or
program selection.
The number system to the base 16. Composed of the characters 0, 1, 2,
3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F.
The difference between the value of an alarm limit and the value of the
corresponding alarm return. The hysteresis zones on either side of the
alarm limits prevent the oscillation of a signal about one of its limits from
generating multiple alarms.
A hardware device that is placed between two other devices, or between
a device and an operator, to make them compatible.
A signal that temporarily stops a microprocessor task and directs it to
another task.
Input/Output. Generally refers to a microprocessor input or output device.
Light Emitting Diode. A hardware device meant to indicate a binary state
or condition by means of the presence or absence of light.
Boundaries placed upon the maximum and minimum permitted values of
a measurement signal for the purpose of generating automatic alarm
messages.
Means either the physical means of communications between two devices
or the firmware programmed into a processor panel in order to function in
a predetermined manner.
The boundary at which an alarm condition is initiated when an analog
point is less than its minimum permissible value.
The lower limit hysteresis level at which a lower limit alarm condition is
removed.
Least Significant Bit.
Remote Terminal Unit
Section 3 – Glossary
27
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