Re: [foxboro] CP60 FT Shadow will not stay running

Neil,
        I have the fieldbus cable terminated at the CP, then goes to
redundant FBI10e's.  Here I have the second side of the connection setup
terminated and use a TEE to connect to the FBI10e's and continue on to my
next cabinet.  The cable then goes to a set of redundant FCM10e's where a
TEE is used to continue on to another cabinet with another set of FCM10e's.
Here there is a TEE used to connect to the FCM10e's and the other end of the
TEE is terminated.  

        It sounds like I should switch my FBI10e setup according to your
statement 5.  Also I don't know if the cables are crossed so I can check
that out.  Thanks for the help.

-----Original Message-----
From: Neil Martin [mailto:neil_martin@xxxxxxxxxxxx]
Sent: Wednesday, December 05, 2001 4:12 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] CP60 FT Shadow will not stay running




After learning the hard way in the past, my first thought is to check how
your ethernet (coax) fieldbus cables are connected and terminated.  If it
is not right, you can easily experience the problems you are seeing.  I
always get a little confused, but I think these are a few of the rules:

1.  For each Fieldbus (A or B) there should only be 2 terminators - one at
the CP end and one at the very end of the FBM chain.  A daisy chain
configuration is used in between the FBM segments.  If there are too many
terminators or not enough, you may not see some of the FBMs or your slave
CP might have a fit and drop off.

2.  The original release of the 200 Series I/O had a problem with the
Fieldbus terminators for the Back Plate assembly, make sure yours is of
recent vintage (Rev B or later I think).  If you made a purchase this year,
they should be the new vintage.  Make sure the 200 Series I/O Back Plates
are terminated correctly.

3.  Make sure your Fieldbus cables are not crossed- keep A only to A and B
only to B.  It seems to me that I remember hearing the 200 Series I/O knows
the difference and is position sensitive based on which slot the isolator
is in.

4.  If you are using ethernet coax to fiber transceivers in the middle of a
coax run, you might find that there needs to be a tee and terminator at
each of the tranceivers.

5.  If you are using FBI10Es, go in on one of the white coax cables and
then out on the other or terminate it if it is the last in the chain.


Neil Martin
Huntsman Corporation
7114 North Lamar Blvd
Austin, TX.  78752
ph) 512-483-0119


 

                    michael.telgenhoff@dowc

                    orning.com                     To:
foxboro@xxxxxxxxxxxxx                                        
                    Sent by:                       cc:

                    foxboro-bounce@freelist        Subject:     [foxboro]
CP60 FT Shadow will not stay running          
                    s.org

 

 

                    12/05/01 02:21 PM

                    Please respond to

                    foxboro

 

 





Hello,
           I have a Fault Tolerant pair of CP-60's installed here.  This is
our
first installation of CP-60's.  Since we have started the process, I have
not been able to keep the shadow module running for more than 24 hrs.  I
get
the both processors married, online and then usually after about 3 hours,
the shadow will fail.  The primary continues to run and the process works
fine but I am not longer redundant.  I have tried using different
controllers, a different Z connector, a different spot in the rack.  Has
anyone seen anything like this?  We are running software NT V. 6.2.1  We
have 3 CP-40 FT's on this system with no problem.

In System management the fail mode says NOT FAILED and the SHADOW MODE says
Off Line
Hardware Revision is 0G
EEPROM Revision is 3.02

If I tell the shadow to go OFFLINE and then run EXEC ALL on the
diagnostics,
everything passes
I can then hit restart and the controllers will go to Married for about 3
hours and then the shadow will go offline again.

Thanks for any help.

> **********************
> Michael Telgenhoff           Midland Plant Process Control Engineer
> Dow Corning Corporation           Voice:          989.496.6855
> 3901 S. Saginaw Rd.          Pager:          989.926.2706
> Midland MI 48686-0995        Fax:            989.496.1897
> mailto:michael.telgenhoff@xxxxxxxxxxxxxx
> **********************
>

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