Re: [foxboro] Foxboro I/A interface with PLC5/30's

If the I/O are low (<16), nothing beats hardwiring.

As the point count goes up, the cost benefit ratio moves to a gateway of
some type.

Regards,
 
Alex Johnson
Invensys Process Systems
Invensys Systems, Inc.
10707 Haddington
Houston, TX 77043
713.722.2859 (voice)
713.722.2700 (switchboard)
713.932.0222 (fax)
ajohnson@xxxxxxxxxxx

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of Baptiste, Nigel
Sent: Monday, May 23, 2005 3:21 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] Foxboro I/A interface with PLC5/30's

Thanks Chuck.

The I/A system (Unix based) will be doing the boiler combustion controls =
and motor control as well as data acquisition.

The project is still in the planning stages so I am seeking advice on =
how to proceed. We can do either of your options but I would like to =
know which is your recommendation based on your experience.

NB.




-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx
[mailto:foxboro-bounce@xxxxxxxxxxxxx]On Behalf Of Jones, Charles R.
(Chuck)
Sent: Monday, May 23, 2005 4:12 PM
To: 'foxboro@xxxxxxxxxxxxx'
Subject: Re: [foxboro] Foxboro I/A interface with PLC5/30's


I've done this and I'm sorry to hear about your troubles...  But =
seriously,
now it's not as bad as it once was.
Before we can begin to send you advice, can you let us know whether you =
are
running on Unix or Windows? =20

And, will your I/A system primarily supply the user interface or will =
there
be controls as well? =20

Or, better yet (since the PLC is only for BMS), can you focus your I/A =
to AB
interface down to passing a few digital bits of information back and =
forth?
Is it good enough that the I/A can just say, "Turn ON (or OFF) the =
flame"
and is it okay if the I/A only has to know whether the flame is ON or =
OFF?

Chuck Jones
Refinery Automation Technologist
Tate & Lyle -- Lafayette South Plant
765.477.5324 - Office  | 877.536.9219 - Pager





-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] =
On
Behalf Of Baptiste, Nigel
Sent: Monday, May 23, 2005 2:59 PM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] Foxboro I/A interface with PLC5/30's



Hello list,

Does anyone have experience interfacing I/A with AB PLC5/30's?

I have to integrate the two for combustion control & burner management =
=3D
on a steam turbine generator unit.

The combustion controls would be replaced with the I/A system but the =
=3D
budget does not permit the replacement of the PLC based BMS.

Hence I'm seeking the best way to interface the two systems.

Regards,
Nigel Baptiste.
=20
=20
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