Re: [foxboro] SAMA and Integrated Control Blocks...
- From: "Johnson, Alex P \(IPS\)" <alex.johnson@xxxxxxxxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Tue, 30 Jan 2007 18:58:43 -0500
You are welcome.
Regards,
=20
Alex Johnson
Invensys Systems, Inc.
10900 Equity Drive
Houston, TX 77041
713.329.8472 (voice)
713.329.1700 (fax)
713.329.1600 (switchboard)
alex.johnson@xxxxxxxxxxxxxxxx
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Stephen Ziegler
Sent: Tuesday, January 30, 2007 6:37 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] SAMA and Integrated Control Blocks...
Alex,
I greatly appreciate your help!
Regards,
Steve Ziegler
On 1/24/07, Johnson, Alex P (IPS) <alex.johnson@xxxxxxxxxxxxxxxx> wrote:
>
> Re: SAMA and the I/A Series
>
> There is no automatic correlation between the SAMA notation and the
I/A
> Series control blocks.
>
> That is, there is no I/A Series tool that can convert SAMA to one or
> more control blocks or vice versa. This is a limitation that
aggravates
> the heck out of folks in the US power market.
>
> Typically, a SAMA drawing is done manually to illustrate the behavior
of
> the control blocks in a CP, but there is nothing that indicates how
the
> CP blocks are used to implement the SAMA logic.
>
> So, the statement that the drawing you are looking at represents a
CALCA
> block may well be true, but there is know way to know that for certain
> other than to identify the block and work it out the hard way.
>
> The new configuration tool - InFusion Engineering Environment - goes a
> long, long way towards fixing that issue, but I doubt that you have it
> in your plant. Currently, it is limited to V8.2 equipment and later.
>
>
> Re: CALC block language
> It is a stack oriented, reverse-polish notation. If you've ever used
an
> HP calculator you've worked with a similar system.
>
> I don't know if Winston Jenks still has it up or not, but he had some
> tools that would take equations and yield CALC block steps (and I
think
> vice versa). His company is Cape Software www.capesoftware.com. It is
a
> useful learning tool at the minimum.
>
>
> Regards,
> =3D20
> Alex Johnson
> Invensys Systems, Inc.
> 10900 Equity Drive
> Houston, TX 77041
> 713.329.8472 (voice)
> 713.329.1700 (fax)
> 713.329.1600 (switchboard)
> alex.johnson@xxxxxxxxxxxxxxxx
> -----Original Message-----
> From: foxboro-bounce@xxxxxxxxxxxxx
[mailto:foxboro-bounce@xxxxxxxxxxxxx]
> On Behalf Of Stephen Ziegler
> Sent: Wednesday, January 24, 2007 9:28 PM
> To: foxboro@xxxxxxxxxxxxx
> Subject: [foxboro] SAMA and Integrated Control Blocks...
>
> Hello all,
> I have been working with Foxboro logic for a few days now. I come from
> a
> Siemens background (TXP) and the notation is somewhat similar.
>
> However, I do have one question. After looking through the
documentation
> (in
> particular, the integrated control block descriptions), I am still not
> sure
> how a block would appear on a logic diagram. For instance, I have
> several
> functional diagrams for valves and instrumentation within a power
plant.
> I
> understand and can follow the logic, but it is all standard SAMA
> notation,
> however one of my colleagues refers to whole diagram as a CALCA block.
> So am
> I to assume that this diagram is literally showing the logic within
the
> CALCA block itself? How can one tell that this is a CALCA block just
by
> looking at the SAMA?
>
> Reading through the I/A docs, I understand what's going on in these
> blocks.
> Essentially it looks like assembly language within the block acting on
> inputs and outputs.
>
> I greatly appreciate your help!
>
> Regards,
> Steve
>
>
> =3D20
> =3D20
>
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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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