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From: "Walter Driedger"
References: <firstname.lastname@example.org> <email@example.com>
Subject: Re: Avoiding PLCs
X-Newsreader: Microsoft Outlook Express 6.00.2720.3000
Date: Wed, 16 Oct 2002 03:24:31 GMT
NNTP-Posting-Date: Tue, 15 Oct 2002 21:24:31 MDT
Organization: Shaw Residential Internet
When I specify that all PLCs on my project shall be make and model XYZ, you
can be sure I will not accept some customized PC on a board with programming
Let me put it this way, if your job was to supply vehicles and I insisted
that all cars be Toyota, I would not accept a GM dump truck as a
work-around. But I will not be arguing with you. You won't be hearing from
me at all if I get the impression that I am being jerked around in that
Your suggestion of using a PC with custom programming is EXACTLY why we
insist on a specific make and model of PLC in the first place. One more
time, WE DO NOT WANT SPECIALIZED HARDWARE AND WE DO NOT WANT SPECIALIZED
"Rufus V. Smith" wrote in message
> "Reed Blake" wrote in message
> > "JohnS" wrote in message
> > news:...
> > > We have run into a problem, hope someone here can make a helpful
> > > suggestion! We have a digital control system which is fairly easily
> > > using a plc. (Lots of interlock logic, timers, 4/20 mA circuits, 4
> > > display, etc) Unfortunately every customer then seems to insist that
> > > build using the make of controller already in use by them. In order to
> > avoid
> > > this I am looking for modular electronic systems that we can program
> > or
> > > whatever so we can avoid using a PLC, but still have the flexibility
> > add
> > > I/O etc as required.
> > Check out the ICL-4300 from Industrial Control Links. I haven't used it,
> > researched it for a project a few years ago.
> > http://www.iclinks.com/Products/IntelligentRtu/IntelligentRtu.html
> > You could also use a National Instruments FieldPoint system, with one of
> > their intelligent controllers.
> > http://www.ni.com
> If you want to go SBC (single board computer) you can check out:
> Which is an attempt to create an Open Source PLC-Like system to
> run on Linux.
> One interesting commercial system (which may be overkill):
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