[foxboro] Cyan Displays

We had a rather unusual event earlier this week and I was hoping that
someone might have seen something similar and can offer some
explanation.  I was called by our field supervisor who told me that the
workstations on all 4 of our nodes (which are connected via a carrier
LAN) were getting cyan connections when displays were called.  I called
up a stations display from a CP to an AW both on another node and it
also displayed cyan connections.  After checking the system I found a CP
that was failed in system management but was still "green" at the
modules.  When this CP was rebooted all of the problems stopped and
everything has run fine since.  The thing that is particularly curious
is how a failed CP could cause errors across several nodes.
Any information about a similar problem or any ideas on how this could
happen would be greatly appreciated.

Regards,
Terry  

Terry J. Deo
Process Control Systems Engineer
Infineum USA, L.P.
Bayway Chemical Plant
Linden, New Jersey


 
 
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