Black Box IC108A Guia do Utilizador descarregar pdf (Página 73)

Advant

Smart Device (HART

) Interface User’s Guide

Section 3.3.5 Configuration of Smart Device (PLC) Parameters

3BUR 001 085R0001 REV A 3-19

BASE SCAN RATE

Enter the base scan rate of the PLC scanner (in seconds). This is the rate at which the scanner

function processes requests. It is the fastest that any command can be processed.

The range for this entry is 0.2 (200 ms) to 600.0 seconds.

Default = 1 second.

Enter 1 for SHIMs.

GOOD DATA WAIT

Enter the maximum time to wait at start-up for a full set of commands to complete. When this

time has expired, CCF is allowed to continue processing.

Range for this entry is 5 to 60 seconds.

Default = 15.

Enter 60 for SHIMs.

MAX READ WAIT

Enter the maximum base rate periods to wait before forcing a set of reads. This is needed

because data writes have precedent over reads.

Range for this entry is 5 to 60 scans.

Default = 15.

EXAMPLE: (MAX READ WAIT) x (BASE SCAN RATE) = Total Read Wait Time in

seconds

15 x 10 = 150 seconds

Enter 15 for SHIMs.

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Black Box IC108A Guia do Utilizador Página 73