Table of Contents
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e-PAQ-9150
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Transition Alarm
Transducer
Turnaround Time
Two's Complement
Unauthorized Change
Update
Upper Limit
Upper Limit Return
Upset
USASCII
Value
Word
Write
30
Section 3 - Glossary
digital signals are used to represent information and these signals are
modified to traverse the remote/master distance by suitable methods
required by their transmission mediums.
An alarm condition created by a device in the act of changing state.
A device, used at the measurement point, for converting the measured
energy (electrical, mechanical, heat, etc.) into a current or a voltage.
The time required to reverse the direction of transmission in a half-duplex
channel.
A binary number obtained by changing each original 0 to a 1, each 1 to a
0, and then adding 1 to the least significant bit (LSB).
Any change in the status of a system point that is not due to a command
initiated by the master station operator.
To place more recent data from a supervisory point into computer
memory, either at the remote or at the master station.
The boundary at which an alarm condition is initiated when an analog
point exceeds the maximum permissible value.
The upper limit hysteresis level at which an upper limit alarm condition is
removed.
A change in the state of a status point, or a specified change percentage
change in the value of a measurement value.
USA Standard Code for Information Interchange (usually abbreviated as
ASCII). An eight-bit binary code for the representation of characters.
The magnitude or state of a supervisory point. A status point has only two
values, while a measurement point has some specific quantity that is
usually specified in engineering units.
A number of binary digits, grouped to be processed as a unit, in which
each position in the group conveys certain specified information. Message
words between master and remote contain 32 bits. Words used within the
microprocessor (such as address or instruction words) are "byte size", or
8 bits.
To enter or provide information, such as when the computer places data
in a RAM memory location or permits information to a peripheral device.
Remote Terminal Unit
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