Re: [foxboro] FBM 224

Tom,

Thanks for your feedback.  We have experienced the phenomenon that you
are describing on other Gateways/PLC's.  This is different.  Taking the
FBM 224 and the PORT offline and online does not fix the problem.  We
even tried doing a database download before putting them back online.
None of these helps.  The only thing that we haven't tried is turning
the PLC off and back on.  Not willing to take the process down to try
that.

Alan D. Weldon, PE
Sr. Process Control Engineer
Hunt Refining Company
aweldon@xxxxxxxxxxxxxxxx
(205) 391-3345
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of tom.vandewater@xxxxxxxxxxxxxx
Sent: Monday, January 31, 2005 12:22 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] FBM 224

Alan,
        We don't have any FBM224's but we have seen something similar
with
our multi-drop PLC's connected via a Modicon gateway.  Even though the
remote device/PLC appears to be capable of communicating, the gateway
loses
communication and won't pick it up again unless we go into Sys_Mgmt and
manually take the device/PLC offline and then put it back online again.
We
haven't tried deleting and undeleting the blocks.  Don't know if this is
something similar to what you are experiencing or not.

Tom VandeWater
Control Systems Developer/Analyst
Dow Corning Corporation
Carrollton, KY   USA

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx
[mailto:foxboro-bounce@xxxxxxxxxxxxx]On Behalf Of Alan Weldon
Sent: Monday, January 31, 2005 9:42 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] FBM 224


I have seen some traffic on the list concerning FBM 224's recently, so
maybe someone has experienced the same problem.
=20

We have an FBM 224 talking to ControlLogix via a Prosoft module.  We
have had a couple of occasions where the communications have dropped
out.  Of course all of the points that are coming in over the Modbus
link "smurf out".  The problem is that some of the points do not come
back.  They remained smurfed and have a W69 - Unvresolved connection

=20

The only way that we have been able to resolve the connection has been
to "Delete Undelete" the points.=20

=20

TAC's response was to submit a CAR, which we will do, however I was
wondering if anyone has experienced this and have any ideas.

=20

Thanks,

=20

Alan D. Weldon, PE

Sr. Process Control Engineer

Hunt Refining Company

aweldon@xxxxxxxxxxxxxxxx

(205) 391-3345

=20


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