Motorola DH6200 Specifications download pdf (Page 76)

2-64 Master Glossary of Terms and Symbols

TR4.0:PROVOX Revision A — April 1997

load

A software-initiated action on a database.

The term refers to the SYBASE database

load function and not the Open Database

load utilities embedded in ENVOXr

software.

load file

A specific type of data file used by the

Documentation Toolkit software to load

database information into AutoCAD

drawings using a data link.

local area network (LAN)

A group of electronic devices that are

relatively close to each other (usually less

than two miles apart) and communicate

with each other using a frequency range

of several megaHertz. LAN

communication includes a switching

capability. A LAN has inexpensive

communication media, such as coaxial or

twisted-pair cable; usually the owner of

the electronic devices also owns the

communication media.

local condition

A TRUE/FALSE evaluation of a

predetermined process state that exists

in the same controller where the

measured variable resides. These

conditions can be logically associated,

time dependent, or both. There are 320

local conditions per controller and three

different types of conditions.

local device (L D)

Any PROVOXr device that resides on a

local highway and can communicate

directly with a local traffic director.

local ground point (LGP)

A central termination point for all signal

common and power supply common

circuits within a cabinet group of eight or

fewer bays.

Local Highway II

A highway that is used to connect as

many as 30 PROVOXr devices together

into a logical token bus.

local point

A point that receives its parameter values

from application programs resident on the

host computer in which the point resides.

With CHIP software, the parameter

values of local points can be sent

unsolicited from CHIP to other PROVOXr

devices using CHIP’s unsolicited transmit

functionality.

local traffic director ( LTD)

A communications device that controls

the data flow on a local data highway. As

many as 30 devices can be on the

highway. An LTD also stores and

forwards messages to other local areas.

location

A logical location in IIS software that

refers to an internal database variable.

This logical location corresponds to one

or more physical locations in the real

world. These logical locations are used

for loop numbering.

locks

A software-initiated action on a database

table. The database software locks tables

that are being affected by a process. The

ENVOXr administrator can determine

which processes are locking which

tables.

LOCN_ID

Internally within IIS, locations are

associated with an internal index number

field called locn_id. The locn_id is what

IIS uses to maintain loop counters.

LOCN table

Table where location configuration is

stored.

LOEC

Acronym: Low Engineering Units Scale

Factor

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