Re: [foxboro] PI points and location 2
- From: "Johnson, Alex (Foxboro)" <ajohnson@xxxxxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Thu, 19 May 2005 11:22:40 -0400
In my experience, if the list is too large and the time between lists
(controlled by foxapi.cfg) is too short, the OM will timeout those tags and
they will be marked OOS by the OM and 0x103 (status word) by FoxAPI.
They will not update.
I believe that a checkpoint of the station that has the tag will force a
reconnection, but other than that, they will not update because the OM
thinks that they do not exist.
Make sense?
PS. This typically happens with large sets, short intervals between list
opening, and heavily loaded or slow stations. In the latter case, the
culprit was frequently DI15/CmP15 based gateways.
Regards,
Alex Johnson
Invensys Process Systems
Invensys Systems, Inc.
10707 Haddington
Houston, TX 77043
713.722.2859 (voice)
713.722.2700 (switchboard)
713.932.0222 (fax)
ajohnson@xxxxxxxxxxx
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of Balmer, Robert D.
Sent: Thursday, May 19, 2005 8:05 AM
To: Foxboro DCS Mail List
Subject: [foxboro] PI points and location 2
PI users
What have those of you that use PI observed with PI tags that reside in a PI
list that has more than 250 points?
Have the points beyond a certain number simply not been updated or have they
been marked as "BAD POINT"?
Robert Balmer
Climax Molybdenum Co.
Applications Analyst/Programmer
ISA CCST
Fort Madison Iowa
319 463 2206
rbalmer@xxxxxxxxxxxxxxx
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