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Glossary

Original Ć June 1990CE4.2:CL6211

Group A PROVOX point type. A group point controls as many as 8 DCD points

allowing them to work in unison.

Group Display A set of 12 point faceplates that appear together on a PROVOX console

screen, so that an operator can see at a glance the most important

information about 12 different points. During system configuration the

user establishes the number of group displays, as well as which point

faceplates make up each group display.

Group Template

A matrix of set point values defined for a group point. For each group

set point, the group template specifies a unique combination of set

points for the individual DCDs which are subordinate to the group point.

Hard Manual Mode (HMAN)

A special control mode associated with controller backup. In Fisher

systems with Redundant Manual Units, if a controller fails, the operator

can retain manual mode control of the loop output.

HighĆLow Signal Selector

A type of primary control algorithm (PCA) which monitors up to four input

signals, and is configured to select either the highest or lowest value.

The selected input signal is then routed directly to the PCA's output.

I Abbreviation: Integral (Reset)

IAC Acronym: 1. (adjective): interactive. 2. (noun) Interactive Controller

ICP Acronym: Indirect Control Point

IFC Acronym: Integrated Function Controller

Implied Valve Position (IVP)

The output of a primary control algorithm (PCA). Usually, the IVP

determines how much to open a valve actuator, which moves to the

appropriate position.

Indirect Control Point (ICP)

A point which is made up of a set of analog or discrete values that may

be displayed at a console, but is not used to directly control a process.

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.

Grou

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Response Electronics CL6011B Specifiche Pagina 298