Motorola DH6200 Specifications download pdf (Page 106)

2-94 Master Glossary of Terms and Symbols

TR4.0:PROVOX Revision A — April 1997

proportional/integral/derivative

control action (PID)

Control action in which the change in the

output signal is proportional to a change

in the error signal, plus the time integral

of the error, plus the rate of change of the

input signal. (The error is the difference

between the PV and SP values.)

proposed revision tag

A proposed revision tag represents a

planned or projected change to an

as-built tag.

protocol

1. A set of data formats and transmission

rules for communication between

electronic devices. Devices that conform

to the same protocol can communicate

accurately.

2. A set of rules that governs the way

devices communicate with each other.

Protocol might include specifications for

transaction rules (master-slave

relationship, acknowledgement, timeouts,

error-recovery), message structure (start

character, addressing, data formats, error

checking), coding (text and numeric data

formats), and physical signal

characteristics (modulation techniques,

signal type, signal level, and transmission

medium, for example).

See Highway Addressable Remote

Transducer (HART).

PROVOXr process management

products

The Fisher-Rosemount Systems’ line of

process control products used in

PROVOX distributed process control

systems.

PROVOXr common area (PCOMM)

A CHIP software subdirectory that

contains general utilities, diagnostic

utilities, and sample code.

PROVOXr Data Highway

An Fisher-Rosemount Systems’ network

system tha t communicates at 250

kilobaud using a local traffic director to

coordinate and prioritize device

messages. The communications protocol

used is adapted from the CCITT x.25

standard.

PROVOXr display format (PDF)

ASCII-based format used for operator

screen displays on PROVOX system

consoles.

PROVOXr Highway II

A Fisher-Rosemount Systems network

system tha t communicates at 5

megabaud for complex process control

systems b y using a tok en-passing bus

access method. This system is the FRSI

implementation of ANSI/IEEE 802.4

token bu s access.

PROVUEr console

The Fisher-Rosemount Systems’ line of

console products for PROVOX systems

that use a global database configuration

and have high-resolution graphics,

ergonomically designed keyboards, and

color printers.

PROVUEr console point type

See Object ID.

PROVUEr display format (PDF)

The ASCII tab-delimited intermediate file

format f or PROVUE displays.

proxy

An @aGlance/IT security feature that

allows a client on an external node to

access a server on the local node.

PSC

Acronym: Power Supply Common

2

1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 197 198

Comments to this Manuals

No comments