From: "Rufus V. Smith"
Subject: Re: Avoiding PLCs
Date: Tue, 15 Oct 2002 10:59:15 -0400
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"Reed Blake" wrote in message news:firstname.lastname@example.org...
> "JohnS" wrote in message
> > We have run into a problem, hope someone here can make a helpful
> > suggestion! We have a digital control system which is fairly easily built
> > using a plc. (Lots of interlock logic, timers, 4/20 mA circuits, 4 line
> > display, etc) Unfortunately every customer then seems to insist that we
> > build using the make of controller already in use by them. In order to
> > this I am looking for modular electronic systems that we can program in C
> > whatever so we can avoid using a PLC, but still have the flexibility to
> > I/O etc as required.
> Check out the ICL-4300 from Industrial Control Links. I haven't used it, but
> researched it for a project a few years ago.
> You could also use a National Instruments FieldPoint system, with one of
> their intelligent controllers.
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):