Re: [foxboro] CALCULATING CHANGE IN VALUE
- From: Richard Peck <lovetomix@xxxxxxxxx>
- To: "foxboro@xxxxxxxxxxxxx" <foxboro@xxxxxxxxxxxxx>
- Date: Sat, 27 Jul 2013 11:58:19 +1000
Hi Tom,
Off topic - you take down the whole DCS once a year?
What maintenance are you doing?
Richard.
On 26 July 2013 06:00, Badura, Tom <tbadura@xxxxxxxxxx> wrote:
> Rakesh,
> Real quick off the top of my head something like this in a CALC block
> should work. I'd give it a try, but our whole system is down for annual
> maintenance.
>
> Tom Badura
> Plastics Engineering Company
> tbadura@xxxxxxxxxx
>
>
> IN M01; One-Shot Toggle
> DON M02; 2 Min Delay M02=120
> OUT M01;
> BIF xx; IF Delay Time
> IN RI01; Current Value
> SUB M03; - Previous Value
> OUT RO01; = Difference
> IN RI01; Current Value
> OUT M03; = Previous Value
> xx END;
>
> -----Original Message-----
> From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
> On Behalf Of RAKESH DASH
> Sent: Thursday, July 25, 2013 12:36 PM
> To: foxboro@xxxxxxxxxxxxx
> Subject: [foxboro] CALCULATING CHANGE IN VALUE
>
> Hi,
> I want to make a calculation where the result would be the subtraction of
> current real value and value of the signal 2 minute before. How to do that ?
> how to capture the value 2 minute before ?
> Using IACC.
>
> Thanks in advance.
>
> Regards,
> Rakesh
>
>
>
>
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>
>
> _______________________________________________________________________
> This mailing list is neither sponsored nor endorsed by Invensys Process
> Systems (formerly The Foxboro Company). Use the info you obtain here at
> your own risks. Read http://www.thecassandraproject.org/disclaimer.html
>
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