[foxboro] FW: just a tip

You may also be able to implement the low cutoff in your AIN block (by
Configuring an appropriate value for the SCI parameter).

Below is one of a number of examples of signal conditioning with low cutoff
(what's shown below is logic built in the AIN block). Refer to document
B0193AW (Integrated Control Software Concepts) for the complete set.

---------------------------------------------------------------------
SCI = 7: Square Root 12800 to 64000 raw counts with low cutoff
IF raw_value <= 13184
THEN
converted_value = LSCO1;
ELSE
converted_value = (SQRT(51200 * (raw_value - 12800)) * (HSCO1-
LSCO1) / 51200) + LSCO1;
---------------------------------------------------------------------

Regards,

Ayoub Ghantous, Eng.
System Integration & IT
Invensys Systems Canada Inc
Tel: 514-421-8310
Fax: 514-421-8054
Email: aghantou@xxxxxxxxxx

-----Original Message-----
From: Ken.E.Moore@xxxxxxxxxxx [mailto:Ken.E.Moore@xxxxxxxxxxx] 
Sent: Tuesday, May 18, 2004 4:55 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] just a tip


We have had the same problem in the past, we resolved it by adjusting the
low flow cut off in the
meter itself.  This may or may not be an option for you depending on the
meter you are using.


Ken Moore
NSCC-Wdrf Plant




"Jaime Claramunt R. (Inforsa)" <jclaramunt@xxxxxxxxxxxxxxx>@freelists.org
on 05/18/2004 04:28:16 PM

Please respond to foxboro@xxxxxxxxxxxxx

Sent by:    foxboro-bounce@xxxxxxxxxxxxx


To:    foxboro@xxxxxxxxxxxxx
cc:
Subject:    [foxboro] just a tip


hey list,

does anybody have a tip for this ...
we have some flowmeters (AIN) that still indicates some when there is no
flow...
this is used then in ACCUM blocks, and I want to find the way to indicate
this block to accumulate only values over a low limit...with limits ?
clamping ? (without hold ...)

thanks

jaime Claramunt
INFORSA Paper Mill



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