[foxboro] Loss of access to CP's
- From: "DUNHAM, KENNETH J" <kdunham@xxxxxxxx>
- To: "'foxboro@xxxxxxxxxxxxx'" <foxboro@xxxxxxxxxxxxx>
- Date: Sat, 3 Dec 2011 17:24:53 +0000
List,
Just wondering if anyone has seen any behavior like the below.
Following troubleshooting one of the redundant the Short Term AIM
historian/OPC Servers was rebooted to resolve a teamed network card issue.
Upon rebooting, the historian failed to reconnect with the gateway to the plant
computer. Subsequently a number of other things occurred:
-The redundant historian connection to the plant computer failed. It remained
failed for a few seconds and then restored without intervention. It continued
to do this periodically.
-Other DCS displays on two other workstations failed. The data being viewed
would "smurf" and then sometimes restore. Two different CPs were involved.
-Individual using IACC to download changes to 050ACP (turbine controls control
processor) was unable to download data to that CP. Download messages were
received indicating that the ICC Driver task could not communicate.
The rebooted historian showed the primary Network Interface Card (NIC)
"disabled".
After Rebooting the historian again with the NIC enabled, the problem with
communication seems to have resolved itself. IACC download was successful.
I/A 8.3, AIM/OPC 3.3, IACC 2.3.1, P91 Boxes on Windows XP.
This is of great concern because it looked like the entire system may have
become unresponsive. I am speculating the rebooted historian generated a
broadcast storm that overwhelmed the network. Didn't have a sniffer hooked up
at the time so we don't really know.
Has anyone experienced anything like this or have any thoughts or suggestions?
Kenneth Dunham
ERF/DCS System Engineer,
Fort Calhoun Station
9610 Power Lane, Blair, NE 68008
Mail Stop FC 1-9
Phone: (402) 533-6934
email: kdunham@xxxxxxxx<mailto:kdunham@xxxxxxxx>
Good judgement comes from experience.
Experience comes from bad judgement.
(Author Unknown)
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