
Original — December 1991
UM4.6:CS6003
Glossary-18
LOEC Low Engineering Units Scale Factor
Log A summary of process operation data, especially a list of significant
events and the times at which they occurred.
Logical Unit (LU)
A conceptual entity that has no real physical existence. A common
logical unit is a computer file: the data that makes up the file is stored in
some physical device, but not necessarily contiguously. Users of
PROVOX systems define points and other logical units as part of system
configuration; such logical units may have reserved portions of a hard-
disk storage device for their data.
Low Engineering Units Scale Factor (LOEC)
A floating-point number that represents the lower limit (0 percent) of the
anticipated range of an analog process variable.
LR Acronym: Link Read-ROM (for PCON)
LSD Acronym: Least Significant Digit
LSP Acronym: Last Setpoint
LTD Acronym: Local Traffic Director
LW Acronym: Link Write-RAM (for PCON)
LU Acronym: Logical Unit
M
Maintenance A PROVOX point type. A maintenance point indicates integrity of a
system device to the system operator.
MAN Abbreviation: Manual Mode
Manual Mode (MAN)
A loop control mode: the operator directly sets the output of a control
loop.
Master Ground Point (MGP)
A common termination point for as many as six local ground point (LGP)
assemblies.
MAX Abbreviation: Maximum
MCA Acronym and IBM trademark: MicroChannel Architecture
LOEC - MCA
Glossary
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