Re: [foxboro] DNBX problem.

O yea,
I forgot to say that the DNBX has been swapped with a spare.

-----Original Message-----
From: Campbell John C [mailto:john_campbell@xxxxxxxxxx]
Sent: Tuesday, 30 April 2002 09:56
To: 'foxboro@xxxxxxxxxxxxx'
Subject: Re: [foxboro] DNBX problem.



Hello Frits

We had a similar problem and it took us a while to finally figure out what
was happening (even our Foxboro Service Rep was pulling his hair on this
one).  

Your options:

a) The WP is going into failure (not likely but I've seen stranger things)
b) You've got a crossed cable (easy to check and again not likely)
d) you've got a bad back plane (a possibility, but something you don't want
to see)
c) Your DNBX is failing.  This is what we finally found was giving us a
multitude of system alarms.   

In our case (and I suspect yours as well) the diagnostics for the DNBX is
minimal at best.  Consequently it never was clear as to what was failing.
We happened to stumble over it in desperate move to rebuild the whole
system.

Hope this helps

John Campbell
EMT Control Systems
Dofasco
(905) 548-4226
john_campbell@xxxxxxxxxx


-----Original Message-----
From: Schouten, Frits JF [mailto:Frits.Schouten@xxxxxxxxxxxx]
Sent: Monday, April 29, 2002 5:45 PM
To: Foxboro DCS Mail List (E-mail)
Subject: [foxboro] DNBX problem.


Dear all,

for a long time now we have a problem with one of the WP's which is
connected to the nodebus via a DNBX.
Values on the graphics are occasionally smurfed for a few seconds, updates
on the graphics are slow, changing graphics can be very slow, etc.
In SMDH the cable error for this WP are alternating between all four options
TA,TB,RA and RB.
I normally have 'station cable A and B' inhibited and the operators have
grown acustom to the slow response and smurfed values.
Last software upgrade to 6.2.1, for some reason, un-inibited the station
cable faults and the operators were screaming their head off about this
system alarm.
I think it's time to do something about it.

What I'm asking is, does anybody know a way of catching what goes on on the
DNBX?
Is it perhaps the comms (you know that second cable) to the DNBX that is
having difficulty and can I monitor that one.
I've been snooping le0 but what am I looking for?

Regards,

Frits Schouten
Process Computing Department
New Zealand Steel
Phone:   +64 +9 375 8111 ext 5261
Email:   Frits.Schouten@xxxxxxxxxxxx



EOM 

NOTICE - This message and any attached files may contain information that is
confidential and/or subject of legal privilege intended only for use by the
intended recipient. If you are not the intended recipient or the person
responsible for delivering the message to the intended recipient, be advised
that you have received this message in error and that any dissemination,
copying or use of this message or attachment is strictly forbidden, as is
the disclosure of the information therein.  If you have received this
message in error please notify the sender immediately and delete the
message.


 
 
_______________________________________________________________________
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
 

EOM 

NOTICE - This message and any attached files may contain information that is
confidential and/or subject of legal privilege intended only for use by the
intended recipient. If you are not the intended recipient or the person
responsible for delivering the message to the intended recipient, be advised
that you have received this message in error and that any dissemination,
copying or use of this message or attachment is strictly forbidden, as is
the disclosure of the information therein.  If you have received this
message in error please notify the sender immediately and delete the
message.


 
 
_______________________________________________________________________
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: