Re: [foxboro] Rate of Change Alarming
- From: Corey R Clingo <corey.clingo@xxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Fri, 4 May 2007 14:25:06 -0500
It does appear to work that way, which unfortunately has rarely been
useful to me, for the reasons you cite. I usually end up doing it in a
CALC* block. You might also be able to use a DTIME block with appropriate
PERIOD and compare the first and last buckets, but I've never tried it.
Corey Clingo
BASF Corporation
"Wilson, Brad" <brad.wilson@xxxxxxxxxxxxxxxx>
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05/04/2007 10:34 AM
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Re: [foxboro] Rate of Change Alarming
There is nothing in REALM that allows you to qualify how it calculates
the rate of change - I'm guessing it compares inputs from scan to scan
which could result in very erratic reading for flows & pressures.
Temperatures are more steady, so perhaps you slow down the scan rate for
the REALM and see if that helps.
Brad Wilson
brad.wilson@xxxxxxxxxxxxxxxx
Invensys Systems, Inc
1090 King Georges Post Rd, Suite 204
Edison, NJ 08837
732-874-0087
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