Motorola DH6200 Specifications download pdf (Page 37)

2-25Master Glossary of Terms and Symbols

TR4.0:PROVOXRevision A — April 1997

CRC

Acronym: Cyclic Redundancy Check

CRI

Acronym: Control Room Instrumentation

critical gain

The gain of a proportional controller

required to produce oscillations of a

constant amplitude in a process variable.

critical period

The period of oscillations produced in a

process variable by a proportional

controller having the critical gain.

CRT

Acronym: Cathode Ray Tube.

CSA

Acronym: Canadian Standards

Association

CSV

Acronym: Comma Separated Value

CTD

Acronym: Console Trend Display

CU MPU

Acronym: Control Unit Microprocessor

Unit

current to p n eu matic transducer (I/P)

An electro-mechanical device that

converts a DC signal (typically 4- to

20-milliamps) to a proportional pneumatic

output signal.

current to pressure transducer (I/P)

An electric component or device that

converts a milliamp DC signal to a

proportional pneumatic pressure output

signal.

cursor

A graphical component that indicates:

1. Where text will appear on the screen

when keyboard keys are pressed.

2. The currently selected screen item.

custom computer (CCOMP)

A formerly-manufactured PROVOXr

console that has a superset of the

capabilities of the CCON, and enables

user-written FORTRAN programs to

interface with the console database.

custom console (CCON)

A formerly-manufactured PROVOXr

console that allows as many as 1000

database points and 100 user-defined

displays in its configuration. Additional

CCON capabilities include discrete

control device (DCD) points, user

calculations, and extended functions

(EDAS).

custom format operator’s console

(CFOC)

Early name for the CCON.

custom installation

When a custom installation is selected,

the installer is prompted to identify the IIS

client code components to be installed.

CWEN

Acronym: Cancel Wait Enable

cycle

A recurring pattern.

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