Response Electronics CL6011B Especificaciones Pagina 137

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Original — December 1991
UM4.6:CS6003
Glossary-15
High Engineering Units Scale Factor (HIEC)
A floating-point number that represents the upper limit (100 percent) of
the anticipated range of an analog process variable.
High-Low Signal Selector
A type of primary control algorithm that accepts as many as four analog
input values, then selects the highest or lowest value to be the output
value. (The operator determines whether the algorithm selects the
highest or lowest value.)
I
I Abbreviation: Integral (Reset)
IAC Acronym: 1. (adjective): interactive. 2. (noun) interactive controller
IC Acronym: Integrated Circuit
ICA Acronym and IBM trademark: Industrial Control Architecture
IEEE Acronym: Institute of Electrical and Electronics Engineers
Implied Valve Position (IVP)
The output of a primary control algorithm (PCA). The IVP normally
determines how much to open a valve actuator, which moves to the
appropriate position. Note that if the IVP is modified by a station function
or FST after being computed by the PCA, the valve output and the IVP
will not be the same.
IND Abbreviation: Indicator
Industrial Control Architecture (ICA)
A group of basic principles that guided the design of several IBM
computers. The acronym ICA is an IBM trademark.
Input/Output (IO or I/O)
Signal reception and transmission, or signal interfacing. Input, for a
process control device, involves accepting and processing signals from
field devices. Output, for a process control device, involves converting
commands into electrical signals to field devices.
Institute of Electrical and Electronic Engineers (IEEE)
An independent technical organization that defines standards for the
electrical, electronic, and computer industries.
Instrument Society of America (ISA)
A professional organization of designers, manufacturers, and users of
process control instrumentation.
Hi
g
h - Ins
Glossary
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