Response Electronics CL6011B Especificações Página 155

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Original — December 1991
UM4.6:CS6003
Glossary-33
Unit Operations Controller (UOC)
A PROVOX controller designed for batch, sequencing, discontinuous,
and unit-oriented continuous-control applications. A UOC includes FST
and LCP functionality.
UNIVOX Trademark for Fisher Controls’ line of self-contained process control
systems.
UOC Acronym: Unit Operations Controller
Upload The movement of Detail Display Parameters from system devices to a
configuration device. An upload lets the current values of parameters be
incorporated into existing configuration source files, eliminating user
entry specific tuning changes.
UPS Acronym: Uninterruptible Power Supply
UVROM Acronym: Ultraviolet Read-Only Memory or Ultraviolet Light Erasable
ROM
V
Valve Output (VO)
A controller voltage or current output that can be used by an actuator to
open or close a valve.
VAX Trademark of Digital Equipment Corporation for several lines of the firm’s
computers; an acronym for Virtual Access eXtension.
VDU Acronym: Video Display Unit
Velocity Limit A restriction on the rate of change of a particular variable.
Video Display Unit (VDU)
An electronic assembly that displays alphanumeric data and graphic
images on a screen, for viewing by a user.
VMS Trademark of Digital Equipment Corporation for one of the firm’s
computer operating systems; an acronym for Virtual Memory System.
VMS provides an operating environment for technical applications of
VAX computers.
VO Acronym: Valve Output or Voltage Output
Voltage Output (VO)
A terminal, available on a PROVOX controller or multiplexer, that
produces a 1- to 5-volt analog output signal.
Uni - Vol
Glossary
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