Re: [foxboro] RV: Open loop alarm

If you set the SCI to the proper value (4-20ma) and set the BAD option, you
get the described behavior for 4-20ma signals. This has been true since day
one.

Regards,
 
Alex Johnson
Invensys Systems, Inc.
10707 Haddington
Houston, TX 77063
+1 713 722 2859 (voice)
+1 713 932 0222 (fax)
+1 713 722 2700 (switchboard)
alex.johnson@xxxxxxxxxxxxxxxx
 

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of Corey R Clingo
Sent: Saturday, November 26, 2005 10:24 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] RV: Open loop alarm

On which version of I/A does this happen?  Open loops on analog outputs 
are not detected on any version I've used up to 7.1/CP60, even with the 
BAD option set, on legacy or 200-series FBMs.  I remember being quite 
surprised at this, as it is a standard feature on the Honeywell AO blocks 
I used before coming to I/A.  It would be nice to have.

Corey Clingo
BASF corp.





"Johnson, Alex P (IPS)" <alex.johnson@xxxxxxxxxxxxxxxx> 
Sent by: foxboro-bounce@xxxxxxxxxxxxx
11/25/2005 01:03 PM
Please respond to
foxboro@xxxxxxxxxxxxx


To
foxboro@xxxxxxxxxxxxx
cc

Subject
Re: [foxboro] RV: Open loop alarm






Open loop alarms are handled as Process Alarms and not Equipment (System)
alarms. As such, they are enabled by setting the BAD Alarm Option on the
block and specifying the alarm destination.

If the block has BAD alarming and alarm destinations set, the CAD will 
show
the message.

Hope this helps.

Regards,

Alex Johnson
Invensys Systems, Inc.
10707 Haddington
Houston, TX 77063
+1 713 722 2859 (voice)
+1 713 932 0222 (fax)
+1 713 722 2700 (switchboard)
alex.johnson@xxxxxxxxxxxxxxxx


-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] 
On
Behalf Of Perez, Claudio
Sent: Friday, November 25, 2005 9:01 AM
To: 'foxboro@xxxxxxxxxxxxx'
Subject: [foxboro] RV: Open loop alarm

Hi list,
There is a way to send an alarm to System monitor when =
analogs
outputs loops are opened? We couldn't find something related in I/A =
Docs.
We recently had a plant shut down because a control valve failed and
closed. Until now it hasn=C2=B4t been discovered the cause. We have =
several
hypothesis, having an open loop alarm could help to figure out what was
wrong.
=09
Thanks
Regards
Claudio A. Perez
Sr. Control Systems Eng.
T=C3=9CV FSEng. ID. Nr.: 0082/05
PROFERTIL S.A.
(54) 291 459-8139
cperez@xxxxxxxxxxxxxxxx
www.profertil.com.ar




 
 
_______________________________________________________________________
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:             http://www.freelists.org/list/foxboro
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe:      mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave
 

 
 
_______________________________________________________________________
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:             http://www.freelists.org/list/foxboro
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe:      mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave

Other related posts: