Re: [foxboro] Foxboro I/A interface with PLC5/30's
- From: "Baptiste, Nigel" <NBaptiste@xxxxxxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Tue, 24 May 2005 09:47:23 -0400
Thanks Chuck,
Our BMS has to comply with NFPA8502. Hence if we were to change the =
PLC5's we would require another redundant CP60 pair and I/O. This is the =
preferred solution from the engineering point of view as with this =
solution the system would be almost identical to two other retrofits =
that were performed previously at our plant.
The constraint however is budget. This in addition to the fact that the =
BMS works reasonably well are the reasons why we would be keeping the =
PLC's.
The problems with the PLC have been - troubleshooting, alarm management =
& historical data. This we intend to solve with the I/A system =
integration.
I will look into the gateway solution.
Thanks.
NB.
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx
[mailto:foxboro-bounce@xxxxxxxxxxxxx]On Behalf Of Jones, Charles R.
(Chuck)
Sent: Monday, May 23, 2005 5:16 PM
To: 'foxboro@xxxxxxxxxxxxx'
Subject: Re: [foxboro] Foxboro I/A interface with PLC5/30's
I recommend clearly defining the separation between the PLC and I/A very =
for
a couple of reasons. One reason is to lower the amount of information =
that
needs to pass between them to the smallest amount necessary. If you can
define the BMS down to a "black box" you may treat it similarly to a =
motor
-- Turn ON, Turn OFF, Let me know if there is a problem, etc. =20
The other reason is to comply with safety regulatory agencies. I =
recommend
keeping the BMS as self-contained as possible, but the regulations in =
your
area may be different than mine. (And, if the current BMS works, why =
fix
it?) Lowering the amount of communication between I/A and burner =
management
makes it easier to certify for safety--and to troubleshoot, later on.
Our equipment is older than you have to work with. We have redundant =
CP30s
and AP51As. We use an AB Gateway. The basic processing cycle is 2 =
seconds.
So, our BMSs have to be self-contained to be fast enough. But, the =
combined
system works just fine.
Once you have clearly defined what each processor will do, the =
communication
solution will depend on how much data you actually need to pass between =
I/A
and PLC (and to how many PLCs you must communicate).
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 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 =
=3D
and motor control as well as data acquisition.
The project is still in the planning stages so I am seeking advice on =
=3D
how to proceed. We can do either of your options but I would like to =3D
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 =3D
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 =
=3D
are
running on Unix or Windows? =3D20
And, will your I/A system primarily supply the user interface or will =
=3D
there
be controls as well? =3D20
Or, better yet (since the PLC is only for BMS), can you focus your I/A =
=3D
to AB
interface down to passing a few digital bits of information back and =3D
forth?
Is it good enough that the I/A can just say, "Turn ON (or OFF) the =3D
flame"
and is it okay if the I/A only has to know whether the flame is ON or =
=3D
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] =
=3D
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
=3D3D
on a steam turbine generator unit.
The combustion controls would be replaced with the I/A system but the =
=3D
=3D3D
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.
=3D20
=3D20
_______________________________________________________________________
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
=3D20
foxboro mailing list: //www.freelists.org/list/foxboro
to subscribe: =3D
mailto:foxboro-request@xxxxxxxxxxxxx?subject=3D3Djoin
to unsubscribe: =3D
mailto:foxboro-request@xxxxxxxxxxxxx?subject=3D3Dleave
=3D20
*************************************************************************=
=3D
****************************
This email and any files transmitted with it are confidential and =3D
intended solely for the=3D20
use of the individual or entity to whom they are addressed. If you are =
=3D
not the intended=3D20
recipient or the person responsible for delivering the email to the =3D
intended recipient, be=3D20
advised that you have received this email in error that any use, =3D
dissemination,=3D20
forwarding, printing, or copying of this email is strictly prohibited. =
=3D
If you have received=3D20
this email in error please notify the sender immediately. Please note =
=3D
that we reserve=3D20
the right to monitor and read any emails sent and received by the =3D
Company in=3D20
accordance with and to the extent permitted by applicable legal rules.
*************************************************************************=
=3D
****************************
=3D20
=3D20
_______________________________________________________________________
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
=3D20
foxboro mailing list: //www.freelists.org/list/foxboro
to subscribe: =3D
mailto:foxboro-request@xxxxxxxxxxxxx?subject=3D3Djoin
to unsubscribe: =3D
mailto:foxboro-request@xxxxxxxxxxxxx?subject=3D3Dleave
=3D20
=20
=20
_______________________________________________________________________
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
=20
foxboro mailing list: //www.freelists.org/list/foxboro
to subscribe: =
mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Djoin
to unsubscribe: =
mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Dleave
=20
*************************************************************************=
****************************
This email and any files transmitted with it are confidential and =
intended solely for the=20
use of the individual or entity to whom they are addressed. If you are =
not the intended=20
recipient or the person responsible for delivering the email to the =
intended recipient, be=20
advised that you have received this email in error that any use, =
dissemination,=20
forwarding, printing, or copying of this email is strictly prohibited. =
If you have received=20
this email in error please notify the sender immediately. Please note =
that we reserve=20
the right to monitor and read any emails sent and received by the =
Company in=20
accordance with and to the extent permitted by applicable legal rules.
*************************************************************************=
****************************
=20
=20
_______________________________________________________________________
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
=20
foxboro mailing list: //www.freelists.org/list/foxboro
to subscribe: =
mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Djoin
to unsubscribe: =
mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Dleave
=20
_______________________________________________________________________
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
foxboro mailing list: //www.freelists.org/list/foxboro
to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave
Other related posts:
