Black Box IC108A Guia do Utilizador descarregar pdf (Página 85)

Advant

Smart Device (HART

) Interface User’s Guide

Section 3.4.3 Loop Definition and FCM Templets

3BUR 001 085R0001 REV A 3-31

Edit Window on Templet—The bottom of the first page of the Loop Definition Templet has an

edit window where you list the names and types of child templets that are to be generated for

this smart device support loop.

Make entries to the FCM list for FCMs of this loop. Typically, the loop needs FCMs that input

smart device data from, and output processed data to, CCF channels in the smart device

interface.

PROCESSING RATE Enter 0 (zero) for processing on demand, or enter a rate.

The smart device input to the loop is analog, a processing

rate must be specified. NOTE:

The rate at which the SHIM scans smart device data is

three times per second. If you place a hand-held monitor

on-line with the smart device, the rate at which the SHIM

scans smart device data drops to one time per second.

The loop processing rate should not be faster than the

SHIM scan rate.

PROCESSING PHASE Leave at default value if processing rate of zero is specified.

TREND RATE Leave at 0 (default) for no trending; or enter a number: 6,

12, 60, 120, 360, 720, 1440, or 2880.

An entry must be made to this field if the measured variable

is to be trended. The entry should be chosen to best suit the

smart device variable that is specified as the measured

variable of the loop in the NAME OF MEASURED FCM

field.

ORDER OF

PROCESSING

Leave at default value. This field is not applicable to this

type of loop.

LO ENG UNIT LIMIT Specify the lower boundary for trend graphs.

(Value becomes default for LO LIMIT and LO LO LIMIT

fields on page 2 of templet.)

HI ENG UNIT LIMIT Specify the upper boundary for trend graphs.

(Value becomes default for HI LIMIT and HI HI LIMIT fields

on page 2 of templet.)

MEASUREMENT

UNITS

Enter a string of up to 6 characters such as PSIG.

The character string that you enter is used as a label

whenever the measured variable of this loop is displayed on

the operational displays. The entry for this field should be

chosen to best suit the smart device variable that is

specified as the measured variable of the loop in the NAME

OF MEASURED FCM field.

LOOP STATE Enter the word ON.

ON should be the entry for this field.

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