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Articles by ControlDraw Ltd
"Is a
storage tank a Unit?" a short article that explains how a Storage
tank can easily be handled by understanding that it does have batch
Exception
handling - a discussion about exception handling in an S88
framework.
Making
Recipes Simpler (PDF) - a WBF paper by Francis Lovering
Note - S88 is very
flexible, but many practitioners seem to follow an approach focused on the
Equipment Modules, with phases running in them.
There is another equally valid
one where phases run in the Unit. ControlDraw can handle either approach,
in fact it can have both in the same model.
You can download a ControlDraw
Model demonstrating this from the Download
page. This model contains a Process Cell and two Units, based on many examples
on the web.
Here are the Typical EM based PDF and
the Unit
Centric PDF exports.
A
Phase driving an Equipment module,
This new Flash movie shows a Phase that drives a chromatography Equipment
Module.
S88
Control Blog
Musings on the S88 standard and how it is used
A collection of papers by various expert authors, Some are PDF, some are web pages Purchase
the Standard from the ISA www.ISA-88.com
is a knowledge community for all who are interested in ISA-88.
Understanding
S88 Batch Control
PDF from Rockwell describing the S88.01 standard
Writing a Functional Specification for a Batch Project
Define the requirements first, or you’ll pay for it later! A PDF article
by Emerson
From
Control Magazine
Estimating
Process Control
Google Search
TWP training S88
links
Jim and Larry' BatchControl.com
Jim and Larry's S88.01
Tutorial
And Jim and Larry worked on automation Ben And Jerry's
They have an
excellent flash description of a batch plant
Vince Miller papers originally from the World Batch Forum
Things
Go Better With S88
The
original SAMA standard
Measurement, Control & Automation Association PDF, Published 1981
IEC1499
Function Blocks
University Halle-Wittenberg, Germany - see Tutorials
The
available White Papers from the 2006 WBF North American Conference.
From ControlGlobal
And one to make you think. OK, it's from a Web company but
it rings bells
"Visual design first, programming second. The more traditional process is starting from the abstract (documentation, diagrams, charts, etc.), coding a skeleton app, and then homing in on the real by finishing it up with an interface. We think that’s backwards."
Getting Real, Step 1: No Functional Spec
"Don’t write a functional specifications document. Why? Well,
there’s nothing functional about a functional specifications document."
Of course that is not true with a ControlDraw FS.
And from another non S88 source - if you are having problem
modelling something it may be a Wicked
Requirement!
Or you just don't know how to tame it.
In such cases ControlDraw Consultants may well be able to help.
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