Re: [foxboro] Some things to talk about
- From: James B Koenig <james.koenig@xxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Thu, 24 Jul 2008 12:12:36 -0500
I agree with Chuck and the others, but don't limit it to a Delay ON -
include a Delay OFF.
I could use a difference alarm in a SWCH block to know when my flows, temps
or levels start separating.
This would keep me from having to build a REALM block to do this and then
have to modify the faceplate to remove the SPT and replace it with the flow
ID.
James B Koenig
Sr. Production Tech / DCS Specialist
BASF Corporation
"Jones,
Charles
R. To
(Chuck)" <foxboro@xxxxxxxxxxxxx>
<Chuck.J cc
ones@tat
eandlyle Subject
.com> Re: [foxboro] Some things to
Sent by: talk about
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Like Corey, I (often) use LOGIC blocks for their inexpensive alarm delay
capability (to filter out spikes). I sometimes use them for creating
interlocks where I need to OR or AND some inputs. If LOGIC blocks go
away, I can use a MON block for the same function. For alarm delays, I
could still use the larger CALC or CALCA. =20
I think we should keep LOGIC blocks. Or, better yet, build a Delay ON
function into our existing alarms.
Chuck Jones
Automation Technologist
Tate & Lyle South Plant
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