Emerson Bristol ControlWave Express Uživatelský manuál stáhnout pdf (Strana 9)

Product Data Document

420DS-3d

July 16, 2007 - Page 9

Bristol

ControlWave

Designer

Remote Automation Solutions

Website: www.EmersonProcess.com/Remote

ACCOL III Function Block Library

Function Block

Name

Description

DIFFERENTIATOR Calculates the rate of change of an input.

DISPLAY Used to congure the Bristol 2 button and 25 button keypad and display connected

to a controller. This will allow an operator to view/change signal data or be allowed

to scroll through lists of signal data based upon their login privileges.

ENCODE This Function Block will do the following:

- Convert packed Julian date/time to REAL values

- Convert REAL values to packed Julian date/time

- Convert system date/time to REAL values

FILE Provides program control to open, close, delete, read and write les

FPV Computes the supercompressibility factor (Fpv) of a gas measured in accordance

with the American Gas Association Report No. NX-19

FUNCTION Performs a table lookup based on array row and column inputs

GENERIC_SERIAL Allows the engineer to write custom serial protocols to third party devices through

message read and write

HILOLIMITER Compares the value of an input to a predened min and max

HILOSELECT Selects the largest and smallest values from a set of inputs.

INTEGRATOR Computes an integral approximation of an input value.

ISO5167 Calculates ow rate for Orice plates, Nozzles, Venturi tubes, and Venturi-nozzle

Primary Devices as specied in the International Organization for Standardization’s

International Standard ISO 5167-1980 (E), 1980 edition.

LEAD_LAG Performs a controlled delay on changes based on a given input. Module can also

be use for simulation of process lag

LIQ Liquids measurements for density ‘A’ and temperature ‘B’ tables 5, 6, 23, 24, 53,

54, 59 and 60. Also, F1 and F1M compressability.

LIST_ELE_NAME Fetches the variable name for a given list element

LIST10, 20, 30, 50 & 100 A list of up to 10, 20, 30, & 50 input or output variables.

MUX Performs a multiplex operation by selecting from a group of inputs, and applying

that selected input to an output.

PDO allows the user to produce pulses of variable width (Pulse Duration Output) at the

digital output eld wiring terminals

PID3TERM Provides a process control algorithm which allows proportional (P), proportional/in-

tegral (PI) or proportional/integral/derivative (PID) modes.

PORT_CTRL Allows the user to manually control the Data Terminal Ready (DTR) output of a

selected communications port. Setting DTR to FALSE will disable the selected port

and place it in low power mode.

1 2 3 4 5 6 7 8 9 10

ControlWave 1
Designer 1

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