Re: [foxboro] AIN Block / Deadband
- From: Ken.E.Moore@xxxxxxxxxxx
- To: foxboro@xxxxxxxxxxxxx
- Date: Fri, 21 May 2004 10:01:46 -0400
A quick solution may be to use a Calc or logic block with
a DON instruction.
That way your analog value would have to be above the threshold for "some"
amout
of time before your equipment would react.
Ken Moore
NSCC-Wdrf Plant
"Livingood, William" <wlivingood@xxxxxxx>@freelists.org on 05/21/2004
09:48:07 AM
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Subject: [foxboro] AIN Block / Deadband
Based on the output from an AIN block, I am turning on/off equipment. The
value from the AIN block sometimes lies right near the threshold for
turning
on/off the equipment. The result is that the value from the AIN block
"bounces" above and below the threshold causing the equipment to turn on
and
off rapidly. Looking at the AIN block documentation, they have a deadband
category (DELT01), BUT the documentation suggests that it is not
functional.
Does anyone have a simple way to send the output of the AIN block through a
deadband feature?
~Bill
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